Introduction. DRAFT DRAFT DRAFT JHU/APL 8/5/02 NanoSat Crosslink Transceiver Software Interface Document

Size: px
Start display at page:

Download "Introduction. DRAFT DRAFT DRAFT JHU/APL 8/5/02 NanoSat Crosslink Transceiver Software Interface Document"

Transcription

1 Introduction NanoSat Crosslink Transceiver Software Interface Document This document details the operation of the NanoSat Crosslink Transceiver (NCLT) as it impacts the interface between the NCLT unit and the host spacecraft Command and Data Handling (C&DH) system. Detailed formats of referenced vector words, packet configurations, and data configuration appear in the accompanying spreadsheet. The NCLT provides GPSbased absolute navigation as well as relative navigation and crosslink communication among a formation of three spacecraft for the University Nanosatellite ION-F team. As currently envisioned, this formation will be deployed from the NASA Space Shuttle as an attached stack of three spacecraft that subsequently separate to perform several formation flying experiments. Each spacecraft will contain an NCLT unit that will provide a GPS navigation system with an integrated crosslink communication capability. Upon initial power-up of the NCLT unit by the host spacecraft, a Navigation Initialization Mode will be entered by the NCLT in which the unit will acquire and track GPS satellites in view, perform Kalman filtering operations, and obtain a navigation estimate for the spacecraft. This Navigation Initialization will require approximately 45 minutes (the dayside of a single spacecraft orbit). To meet aggressive power constraints, the host spacecraft will power-down the NCLT unit during the nightside of the orbit. During subsequent orbits, the host spacecraft will power up the NCLT unit during the dayside orbit phase and the unit will operate in a nominal mode consisting of the sequence: Boot Mode, Software Initialization Mode, Acquisition Mode, Navigation Mode, Crosslink Mode. This sequence will initialize the NCLT for operation, acquire and track GPS to update navigation estimates and crosslink with other spacecraft in the formation for data exchange. When these operations are complete, the host spacecraft will power down the NCLT.

2 1. NCLT Basic Operation When the host spacecraft provides power to the NCLT, the system enters Boot Mode, which loads application code into the appropriate memory. After the NCLT boot system has completed, the application software is initialized, and initiates a general Navigation task. The NCLT begins operation by searching for GPS satellites. Once at least four satellites are in week synch (phase locked with synchronization on the week indicator in the GPS data), the NCLT will begin navigating a GPS derived position and velocity. It will also align the NCLT clock with the UTC epoch. The primary data interface between the NCLT and the host spacecraft C&DH is the baud serial port. Once obtained, the GPS derived navigation estimates, including spacecraft position, velocity, and time, are provided as one-second (1 Hz) data products. The one-second data products are output on the serial port between 10 and 250 milliseconds after the 1-PPS signal indicates the UTC epoch. When the NCLT is tracking GPS (i.e., when in Navigation Mode), the one-second data products consist of: synch pattern and vector word, navigated position and velocity data, vector pointing to the sun, event flags, data validity flags, NCLT error data, command status data, NCLT status data. If the one-second navigation data products are available, the NCLT will output the full data products on the serial port that second. If the products are not available (e.g. during GPS Acquisition Mode), the NCLT will output only the fixed synch pattern and the vector word. In each case, the vector word will indicate (bit #7) whether the unpacketized data products will follow. All data products coming from the NCLT to the C&DH system will be preceded by a fixed synch pattern of 32 bits Boot Mode When powered-up by the host spacecraft, the NCLT will load and execute the boot software. Indications of boot execution are in the Boot Code External Interface Control Document Software Initialization Mode Upon completion of the boot code execution, the NCLT enters Software Initialization Mode, in which the system is initialized for nominal operations. Software initialization occurs for

3 approximately TBD <10s> seconds The Navigation code fills RAM with data stored in EEPROM, initializes various systems, and enters Acquisition Mode Acquisition Mode While the NCLT is searching for GPS satellites, it is in Acquisition Mode. In this mode, the NCLT continually scans for and attempts to lock onto the signal of GPS satellites. On the first power-up the satellite pseudorandom noise sequences (PRNs) are searched in a predetermined sequence. On subsequent power-ups, the satellite PRNs are searched using a PRN sequence derived from a saved state vector propagated to the current time. During Acquisition Mode, the NCLT will continually attempt to reach Navigation Mode. The NCLT is will switch to Navigation Mode after it has: 1. obtained week synch with at least 4 GPS satellites, 2. initialized the navigation filter, and 3. begun producing a navigated solution along with the associated one-second data products. During acquisition mode, the NCLT will output only the synch word (1) and the C&DH vector word. Acquisition mode can last from approximately 4 minutes to 24 minutes Navigation Mode During navigation mode, the NCLT will perform a navigation Kalman filter update once every 60 seconds. This will update the estimated NCLT position, velocity, drag error, clock bias, and frequency bias. Using this navigated solution, the navigation system will compute one-second data products to be sent to the C&DH system for use by the spacecraft. Once these navigation data products are available, the NCLT will output the full data products on the serial port each second. These data need not be saved onto the Flight data recorder, it is solely for the immediate use of the spacecraft. If, for any reason, the NCLT ceases navigation, it will return to Acquisition Mode until navigation is resumed. After the first Kalman filter update, the 1-PPS signal will be synchronized to UTC to within TBD <200ns> nanoseconds. The 1-PPS signal s change from high to low voltage indicates the UTC epoch. The low to high transition is ½ second after the UTC epoch. As indicated previously, the first time the NCLT is powered by the host spacecraft it will remain in Navigation Mode for approximately 45 minutes in order to obtain an accurate navigation

4 solution. During subsequent power-ups, the NCLT will operate in Navigation Mode for 15 minutes, providing a navigation solution update before entering Crosslink Mode Crosslink Mode Upon entering Crosslink Mode, the NCLT will output to the serial port only the synch word and the C&DH vector word. This will continue for TBD minutes. Crosslink Mode consists of a round-robin operation involving half-duplex, time division multiple access communication among the three spacecraft in the formation. At the completion of the crosslink session, after all spacecraft have transmitted and received the available data, all crosslink data will be output in a data dump to the serial port. These data include: Crosslink Message Data These data are the crosslink data for all three spacecraft. The 1 st set of crosslink message data will be for spacecraft #1, the 2 nd for spacecraft #2, the 3 rd for spacecraft #3. For example, if the present spacecraft is #1, then the 1 st set of crosslink message data will be the data that was sent on the crosslink to spacecraft #2 and #3. The 2 nd and 3 rd sets of crosslink message data will be data received on the crosslink from spacecraft #2 and #3 respectively. If the present spacecraft is #2, then the 1 st set of crosslink message data will be the data that was received on the crosslink from spacecraft #1. The 2 nd set of crosslink message data will be that sent on the crosslink to spacecraft #1 and #3. The 3 rd set of crosslink message data will be data received on the crosslink from spacecraft #3 respectively. Unpacketized Data These data is numerous sets of unpacketized data saved by the NCLT for downlink to the ground. Packetized Data These data include several telemetry data packets created by the NCLT for downlink to the ground. The data dump should be saved to the onboard recorder and downlinked for use by APL.

5 2. Vector Word Description Bits 0-2 Number of Telemetry Packets contained in the packetized data: For the NCLT, this is zero because packetized data has been disabled. Bit 3 Reserved. Bit 4 NCLT Heartbeat: This bit is toggled by the NCLT once a second (except while executing the boot code) to indicate that the NCLT is alive. IF the toggling ceases for a period of 2 seconds, it is presumed that the NCLT is inoperable. Bit 5 Operational Status: This bit changes to 1 once the NCLT application code has begun operating. Bit 6 Physical Memory Dump: This bit indicates if a NCLT physical memory dump packet is available. For the NCLT, this bit will remain zero. Bit 7 Unpacketized Data Indicator: This bit indicates whether there is unpacketized data following the vector word. 0 = no unpacketized data following vector word 1 = unpacketized data will following vector word

6 3. Telecommand Packets Telecommand packets are sent to the NCLT from the host spacecraft C&DH across the serial port interface. These packets may span a one-second interval. As soon as the complete telecommand packet is received, the NCLT will execute the telecommand packet. One should wait at least (2) seconds after a telecommand packet has been sent before sending another packet. 3.1 Packet Description The NCLT can receive, at most, (1) 2086-byte maximum telecommand packet per second which is comprised of up to a maximum of 8 commands. See Figure 1 for a diagram of the NCLT telecommand packets. The 32-bit XOR checksum in each command is calculated on the Command ID (Opcode), Word Count and Command Data fields. Bit Field Length (bits) Value (binary) Fixed/User Defined Description Version Number Fixed Packet Type 1 1 Fixed Telecommand Packet Secondary Header Flag 1 0 Fixed No Secondary Header Application ID Fixed NCLT Sequence Flag 2 11 Fixed Standalone Packet Source Sequence Count 14 0 to Incrementing Counter Pkt Length (bytes) 16 7 to 2079 User Defined Sec. Hdr & Appl Data -1 Secondary Header 0 Not Used Application Data 8 to 2080 bytes User Defined 8 Commands Max Figure 1 NCLT Telecommand Packet Structure Bit Field Length (bits) Value Fixed/User Defined Description Command ID 16 User Defined 32-bit Word Count 16 2 to 520 User Defined Of All Command Fields Command Data 0 to 518 words User Defined Depends on # of Cmds XOR Checksum 32 User Defined Bit Field Length (bits) Value Fixed/User Defined Description Command ID 16 User Defined 32-bit Word Count 16 2 to 520 User Defined Of All Command Fields Command Data 0 to 518 words User Defined Depends on # of Cmds XOR Checksum 32 User Defined Figure 2 NCLT Command Structure (Max. of 8 Commands per Telecommand Packet) 3.2 Command Description All command parameters consist of (1) unsigned 32-bit word unless otherwise noted.

7 NCLT Command Description: Upload ION-F Crosslink Commands Opcode: 0x100A Command Length (words): 9 Parameter: #1: ION-F Command #1 #2: ION-F Command #2 #3: ION-F Command #3 #4: ION-F Command #4 #5: ION-F Command #5 #6: ION-F Command #6 #7: ION-F Command #7 Comments: This is used to upload the 7 ION-F commands that will be contained in the crosslink message sent to the other spacecraft. Note: This command should be sent only once during the navigation phase of the NCLT operation. If it is sent more than once, only the last set of commands will be sent on the crosslink.

Spacecraft to Science Instrument Data Interface Control Document. Dwg. No

Spacecraft to Science Instrument Data Interface Control Document. Dwg. No Rev. ECO Description Checked Approval Date 01 Initial Release for S/C negotiation RFGoeke 4 Oct.02 Spacecraft to Science Instrument Data Interface Control Document Dwg. No. 43-03001 Revision 01 4 October

More information

A GLONASS Observation Message Compatible With The Compact Measurement Record Format

A GLONASS Observation Message Compatible With The Compact Measurement Record Format A GLONASS Observation Message Compatible With The Compact Measurement Record Format Leica Geosystems AG 1 Introduction Real-time kinematic (RTK) Global Navigation Satellite System (GNSS) positioning has

More information

THE GPS SATELLITE AND PAYLOAD

THE GPS SATELLITE AND PAYLOAD THE GPS SATELLITE AND PAYLOAD Andrew Codik and Robert A. Gronlund Rockwell International Corporation Satellite Systems Division 12214 Lakewood Boulevard Downey, California, USA 90241 ABSTRACT The NAVSTAR/Global

More information

AntelSat Amateur Radio services

AntelSat Amateur Radio services AntelSat Amateur Radio services Facultad de Ingeniería 2014-06-23 1 Introduction AntelSat is a 2U CubeSat class nanosatellite, designed and developed by engineering teams from Uruguay s state university

More information

MN5020HS Smart GPS Antenna Module

MN5020HS Smart GPS Antenna Module 1 Description The Micro Modular Technologies MN5020HS Smart Global Positioning System (GPS) Antenna Module is a complete 20-channel receiver with an integrated 18 x 18 mm patch antenna. With this highly

More information

CubeSat Developers Workshop 2014

CubeSat Developers Workshop 2014 CubeSat Developers Workshop 2014 IPEX Intelligent Payload EXperiment Eric Baumgarten 4/23/14 CubeSat Workshop 2014 1 IPEX Mission Summary 1U Cubesat in collaboration with JPL Cal Poly s PolySat constructed

More information

3V TRANSCEIVER 2.4GHz BAND

3V TRANSCEIVER 2.4GHz BAND 3V TRANSCEIVER 2.4GHz BAND Rev. 2 Code: 32001271 QUICK DESCRIPTION: IEEE 802.15.4 compliant transceiver operating in the 2.4 GHz ISM band with extremely compact dimensions. The module operates as an independent

More information

CubeSat Navigation System and Software Design. Submitted for CIS-4722 Senior Project II Vermont Technical College Al Corkery

CubeSat Navigation System and Software Design. Submitted for CIS-4722 Senior Project II Vermont Technical College Al Corkery CubeSat Navigation System and Software Design Submitted for CIS-4722 Senior Project II Vermont Technical College Al Corkery Project Objectives Research the technical aspects of integrating the CubeSat

More information

The TEXAS Satellite Design Laboratory: An Overview of Our Current Projects FASTRAC, BEVO-2, & ARMADILLO

The TEXAS Satellite Design Laboratory: An Overview of Our Current Projects FASTRAC, BEVO-2, & ARMADILLO The TEXAS Satellite Design Laboratory: An Overview of Our Current Projects FASTRAC, BEVO-2, & ARMADILLO Dr. E. Glenn Lightsey (Principal Investigator), Sebastián Muñoz, Katharine Brumbaugh UT Austin s

More information

Generic Bathymetry Data - Interface Control Document

Generic Bathymetry Data - Interface Control Document Generic Bathymetry Data - Interface Control Document For WASSP Prepared by: Keith Fletcher Electronic Navigation Ltd October 15, 2013 Version 2.2 2013 by WASSP Ltd No part of this document should be reproduced

More information

GNSS Technologies. GNSS Acquisition Dr. Zahidul Bhuiyan Finnish Geospatial Research Institute, National Land Survey

GNSS Technologies. GNSS Acquisition Dr. Zahidul Bhuiyan Finnish Geospatial Research Institute, National Land Survey GNSS Acquisition 25.1.2016 Dr. Zahidul Bhuiyan Finnish Geospatial Research Institute, National Land Survey Content GNSS signal background Binary phase shift keying (BPSK) modulation Binary offset carrier

More information

SNIPE mission for Space Weather Research. CubeSat Developers Workshop 2017 Jaejin Lee (KASI)

SNIPE mission for Space Weather Research. CubeSat Developers Workshop 2017 Jaejin Lee (KASI) SNIPE mission for Space Weather Research CubeSat Developers Workshop 2017 Jaejin Lee (KASI) New Challenge with Nanosatellites In observing small-scale plasma structures, single satellite inherently suffers

More information

(SDR) Based Communication Downlinks for CubeSats

(SDR) Based Communication Downlinks for CubeSats Software Defined Radio (SDR) Based Communication Downlinks for CubeSats Nestor Voronka, Tyrel Newton, Alan Chandler, Peter Gagnon Tethers Unlimited, Inc. 11711 N. Creek Pkwy S., Suite D113 Bothell, WA

More information

Integrating a GPS Receiver with the Digiquartz Nano-Resolution Barometer

Integrating a GPS Receiver with the Digiquartz Nano-Resolution Barometer Integrating a GPS Receiver with the Digiquartz Nano-Resolution Barometer Paroscientific, Inc. 4500 148 th Ave. N.E. Redmond, WA 98052, USA Tel: (425) 883-8700 Fax: (425) 867-5407 www.paroscientific.com

More information

EVDP610 IXDP610 Digital PWM Controller IC Evaluation Board

EVDP610 IXDP610 Digital PWM Controller IC Evaluation Board IXDP610 Digital PWM Controller IC Evaluation Board General Description The IXDP610 Digital Pulse Width Modulator (DPWM) is a programmable CMOS LSI device, which accepts digital pulse width data from a

More information

Internet based Real-Time Telemetry System for the micro-satellite. in Low Earth Orbit. 1 Introduction

Internet based Real-Time Telemetry System for the micro-satellite. in Low Earth Orbit. 1 Introduction Internet based Real-Time Telemetry System for the micro-satellite in Low Earth Orbit C. W. Park 1,.G Réhel 1, P. Olivier 2, J. Cimon 2, B. Piyau 1,and L. Dion 2. 1 Université du Québec à Rimouski, Rimouski,

More information

Every GNSS receiver processes

Every GNSS receiver processes GNSS Solutions: Code Tracking & Pseudoranges GNSS Solutions is a regular column featuring questions and answers about technical aspects of GNSS. Readers are invited to send their questions to the columnist,

More information

1 UAT Test Procedure and Report

1 UAT Test Procedure and Report 1 UAT Test Procedure and Report These tests are performed to ensure that the UAT Transmitter will comply with the equipment performance tests during and subsequent to all normal standard operating conditions

More information

LABsat Manual Fall 2005

LABsat Manual Fall 2005 LABsat Manual Fall 2005 This manual describes the USNA Laboratory Satellite System which has been designed to provide a realistic combination of all the aspects of satellite design including the Electrical

More information

CANopen Programmer s Manual Part Number Version 1.0 October All rights reserved

CANopen Programmer s Manual Part Number Version 1.0 October All rights reserved Part Number 95-00271-000 Version 1.0 October 2002 2002 All rights reserved Table Of Contents TABLE OF CONTENTS About This Manual... iii Overview and Scope... iii Related Documentation... iii Document Validity

More information

UKube-1 Platform Design. Craig Clark

UKube-1 Platform Design. Craig Clark UKube-1 Platform Design Craig Clark Ukube-1 Background Ukube-1 is the first mission of the newly formed UK Space Agency The UK Space Agency gave us 5 core mission objectives: 1. Demonstrate new UK space

More information

Specifications Attitude and Heading Specifications. GP9 GPS-Aided AHRS Datasheet, Revision 1.3

Specifications Attitude and Heading Specifications. GP9 GPS-Aided AHRS Datasheet, Revision 1.3 Introduction The GP9 GPS-Aided AHRS combines MEMS inertial sensors and embedded GPS with an Extended Kalman Filter to produce attitude estimates that are immune to long-term angular drift and sustained

More information

Low Energy Telescope Interface Control Document for the Solar Energetic Particle Central Electronics. LET-SEP_Central ICD

Low Energy Telescope Interface Control Document for the Solar Energetic Particle Central Electronics. LET-SEP_Central ICD Document No. Low Energy Telescope Interface Control Document for the Solar Energetic Particle Central Electronics LET-SEP_Central ICD Revision A March 19, 2003 Prepared by Branislav Kecman Approval signatures:

More information

High Energy Telescope Interface Control Document for the Solar Energetic Particle Central Electronics. HET-SEP_Central ICD

High Energy Telescope Interface Control Document for the Solar Energetic Particle Central Electronics. HET-SEP_Central ICD Document No. High Energy Telescope Interface Control Document for the Solar Energetic Particle Central Electronics HET-SEP_Central ICD Revision A March 19, 2003 Prepared by Branislav Kecman Approval signatures:

More information

BRB900 GPS Telemetry System August 2013 Version 0.06

BRB900 GPS Telemetry System August 2013 Version 0.06 BRB900 GPS Telemetry System August 2013 Version 0.06 As of January 2013, a new model of the BRB900 has been introduced. The key differences are listed below. 1. U-blox GPS Chipset: The Trimble Lassen IQ

More information

ROTRONIC HygroClip Digital Input / Output

ROTRONIC HygroClip Digital Input / Output ROTRONIC HygroClip Digital Input / Output OEM customers that use the HygroClip have the choice of using either the analog humidity and temperature output signals or the digital signal input / output (DIO).

More information

Stensat Transmitter Module

Stensat Transmitter Module Stensat Transmitter Module Stensat Group LLC Introduction The Stensat Transmitter Module is an RF subsystem designed for applications where a low-cost low-power radio link is required. The Transmitter

More information

ICESat (GLAS) Science Processing Software Document Series The Algorithm Theoretical Basis Document for Level 1A Processing Version 1.

ICESat (GLAS) Science Processing Software Document Series The Algorithm Theoretical Basis Document for Level 1A Processing Version 1. ICESat (GLAS) Science Processing Software Document Series The Algorithm Theoretical Basis Document for Level 1A Processing Version 1.7 Peggy L. Jester/SGT, Inc. Observational Science Branch Laboratory

More information

Know your energy. Modbus Register Map EB etactica Power Bar

Know your energy. Modbus Register Map EB etactica Power Bar Know your energy Modbus Register Map EB etactica Power Bar Revision history Version Action Author Date 1.0 Initial document KP 25.08.2013 1.1 Document review, description and register update GP 26.08.2013

More information

Data Sheet Version 1.3

Data Sheet Version 1.3 Low-Power High-Performance and Low-Cost ost 65 Channel GPS Engine Board (Flash based) Data Sheet Version 1.3 Abstract Technical data sheet describing the cost effective, high-performance GPS610F based

More information

GPS SMART ANTENNA (GWG4287SX)

GPS SMART ANTENNA (GWG4287SX) GPS SMART ANTENNA (GWG4287SX) SiRFSTARIII /LPx Specifications are subject to change without notice KOREA ELECTRIC TERMINAL CO., LTD. All right reserved http://www.ket.com 1. Introduction 1.1 Over view

More information

2320 cousteau court

2320 cousteau court Technical Brief AN139 Rev C22 2320 cousteau court 1-760-444-5995 sales@raveon.com www.raveon.com RV-M7 GX with TDMA Data By John Sonnenberg Raveon Technologies Corporation Overview The RV-M7 GX radio modem

More information

Lecture 3: Modulation & Clock Recovery. CSE 123: Computer Networks Stefan Savage

Lecture 3: Modulation & Clock Recovery. CSE 123: Computer Networks Stefan Savage Lecture 3: Modulation & Clock Recovery CSE 123: Computer Networks Stefan Savage Lecture 3 Overview Signaling constraints Shannon s Law Nyquist Limit Encoding schemes Clock recovery Manchester, NRZ, NRZI,

More information

The GLOBAL POSITIONING SYSTEM James R. Clynch February 2006

The GLOBAL POSITIONING SYSTEM James R. Clynch February 2006 The GLOBAL POSITIONING SYSTEM James R. Clynch February 2006 I. Introduction What is GPS The Global Positioning System, or GPS, is a satellite based navigation system developed by the United States Defense

More information

EVALUATION OF GPS BLOCK IIR TIME KEEPING SYSTEM FOR INTEGRITY MONITORING

EVALUATION OF GPS BLOCK IIR TIME KEEPING SYSTEM FOR INTEGRITY MONITORING EVALUATION OF GPS BLOCK IIR TIME KEEPING SYSTEM FOR INTEGRITY MONITORING Dr. Andy Wu The Aerospace Corporation 2350 E El Segundo Blvd. M5/689 El Segundo, CA 90245-4691 E-mail: c.wu@aero.org Abstract Onboard

More information

USING GLONASS SIGNAL FOR CLOCK SYNCHRONIZATION

USING GLONASS SIGNAL FOR CLOCK SYNCHRONIZATION USING GLONASS SIGNAL FOR CLOCK SYNCHRONIZATION Prof. Yuri G.Gouzhva, Prof. Anid G.Gevorkyan, Dr. Pyotr P.Eogdanov, Dr. Vitaly V. Ovchinnikov Russian Institute of Radionavigation and Time 2, Rastrelli square,

More information

A. Measured weight of the payload (not including payload plate) Table 1. Weights of the payload subsystems

A. Measured weight of the payload (not including payload plate) Table 1. Weights of the payload subsystems Payload Title: High Altitude Radiation Detector Payload Class: Small Large (circle one) Payload ID: Institution: Contact Name: Contact Phone: Contact E-mail: GU-HARD-PL02 Gannon University Nichole McGuire

More information

Using GPS in Embedded Applications Pascal Stang Stanford University - EE281 November 28, 2000

Using GPS in Embedded Applications Pascal Stang Stanford University - EE281 November 28, 2000 Using GPS in Embedded Applications Pascal Stang Stanford University - EE281 INTRODUCTION Brief history of GPS Transit System NavStar (what we now call GPS) Started development in 1973 First four satellites

More information

Global Navigation Satellite System for IE 5000

Global Navigation Satellite System for IE 5000 Global Navigation Satellite System for IE 5000 Configuring GNSS 2 Information About GNSS 2 Guidelines and Limitations 4 Default Settings 4 Configuring GNSS 5 Configuring GNSS as Time Source for PTP 6 Verifying

More information

Servo Switch/Controller Users Manual

Servo Switch/Controller Users Manual Servo Switch/Controller Users Manual March 4, 2005 UK / Europe Office Tel: +44 (0)8700 434040 Fax: +44 (0)8700 434045 info@omniinstruments.co.uk www.omniinstruments.co.uk Australia / Asia Pacific Office

More information

Non-Packet Time-of-Day Distribution

Non-Packet Time-of-Day Distribution Non-Packet Time-of-Day Distribution Presented to: WSTS 2011 Session 2 Telcordia Contact: Tom Bowmaster Principal Analyst Advanced Technology Solutions tbowmast@telcordia.com +1 732.699.5489 May 10, 2011

More information

Kongsberg Mesotech Ltd.

Kongsberg Mesotech Ltd. Kongsberg Mesotech Ltd. Doc. No. : 974-00007904 Title : Digital Telemetry Notes elease : Version 1.4 Date : 2010-04-30 1. PUPOSE This document briefly describes the digital telemetry standards, formats

More information

Implementation of three axis magnetic control mode for PISAT

Implementation of three axis magnetic control mode for PISAT Implementation of three axis magnetic control mode for PISAT Shashank Nagesh Bhat, Arjun Haritsa Krishnamurthy Student, PES Institute of Technology, Bangalore Prof. Divya Rao, Prof. M. Mahendra Nayak CORI

More information

VRS20. Contents. Communications. Stay involved. RS232 Communications. 2/14/2014 VRS20 - Valeport

VRS20. Contents. Communications. Stay involved. RS232 Communications. 2/14/2014 VRS20 - Valeport Brian VRS20 View Edit History Contents Communications RS232 Communications RS485 Communications RS485 Address Mode SDI12 Communications Data Standalone Data Format GPRS Data Format Data Status Sampling

More information

DS1867 Dual Digital Potentiometer with EEPROM

DS1867 Dual Digital Potentiometer with EEPROM Dual Digital Potentiometer with EEPROM www.dalsemi.com FEATURES Nonvolatile version of the popular DS1267 Low power consumption, quiet, pumpless design Operates from single 5V or ±5V supplies Two digitally

More information

CDR-915 Data Radio Module INTEGRATOR S GUIDE

CDR-915 Data Radio Module INTEGRATOR S GUIDE CDR-915 Data Radio Module Coyote DataCom, Inc. 3941 Park Drive, Suite 20-266, El Dorado Hills, CA 95762 Tel. 916-933-9981 Fax 916-913-0951 www.coyotedatacom.com TABLE OF CONTENTS General Information and

More information

Principles of the Global Positioning System Lecture 19

Principles of the Global Positioning System Lecture 19 12.540 Principles of the Global Positioning System Lecture 19 Prof. Thomas Herring http://geoweb.mit.edu/~tah/12.540 GPS Models and processing Summary: Finish up modeling aspects Rank deficiencies Processing

More information

NMEA2000- Par PGN. Mandatory Request, Command, or Acknowledge Group Function Receive/Transmit PGN's

NMEA2000- Par PGN. Mandatory Request, Command, or Acknowledge Group Function Receive/Transmit PGN's PGN Number Category Notes - Datum Local geodetic datum and datum offsets from a reference datum. T The Request / Command / Acknowledge Group type of 126208 - NMEA - Request function is defined by first

More information

GPS Global Positioning System

GPS Global Positioning System GPS Global Positioning System 10.04.2012 1 Agenda What is GPS? Basic consept History GPS receivers How they work Comunication Message format Satellite frequencies Sources of GPS signal errors 10.04.2012

More information

LOCALIZATION WITH GPS UNAVAILABLE

LOCALIZATION WITH GPS UNAVAILABLE LOCALIZATION WITH GPS UNAVAILABLE ARES SWIEE MEETING - ROME, SEPT. 26 2014 TOR VERGATA UNIVERSITY Summary Introduction Technology State of art Application Scenarios vs. Technology Advanced Research in

More information

A Miniaturized Nanosatellite VHF / UHF Communications System

A Miniaturized Nanosatellite VHF / UHF Communications System A Miniaturized Nanosatellite VHF / UHF Communications System W.J. Ubbels, A.R. Bonnema, J. Rotteveel, E.D. van Breukelen ISIS Innovative Solutions In Space BV Rotterdamseweg 380, 2629HG Delft; +31 15 256

More information

JT4 Data on the UKµWG Reverse DDS Module

JT4 Data on the UKµWG Reverse DDS Module JT4 Data on the UKµWG Reverse DDS Module Andy Talbot G4JNT April 2010 JT4 Overview The JT4G data mode, part of the WSJT Suite by Joe Taylor, K1JT, [1] has proved its capability for getting through under

More information

APN-0046: Configure CAN for SPAN

APN-0046: Configure CAN for SPAN APN-0046: Configure CAN for SPAN Page 1 March 11, 2015 Configure CAN for SPAN This application note provides general guidance on how to configure the Controller Area Network (CAN) interface for NovAtel

More information

SAT SCD/ARGOS INSTRUCTION MANUAL

SAT SCD/ARGOS INSTRUCTION MANUAL INSTRUCTION MANUAL REVISION: 1/03 COPYRIGHT (c) 2000-2003 CAMPBELL SCIENTIFIC, INC. This is a blank page. WARRANTY AND ASSISTANCE This equipment is warranted by CAMPBELL SCIENTIFIC (CANADA) CORP. ( CSC

More information

Tracking, Telemetry and Command

Tracking, Telemetry and Command Tracking, Telemetry and Command Jyh-Ching Juang ( 莊智清 ) Department of Electrical Engineering National Cheng Kung University juang@mail.ncku.edu.tw April, 2006 1 Purpose Given that the students have acquired

More information

Configuring the Global Navigation Satellite System

Configuring the Global Navigation Satellite System Configuring the Global Navigation Satellite System Effective Cisco IOS-XE Release 3.17, the Cisco ASR-920-12SZ-IM router uses a satellite receiver, also called the global navigation satellite system (GNSS),

More information

MN8010 GPS Receiver Module

MN8010 GPS Receiver Module 1 Description PRELIMINARY DATA SHEET The Micro Modular Technologies MN8010 Global Positioning System (GPS) Receiver Module is a complete 48-channel receiver with high sensitivity that measures only 10

More information

HOMANN DESIGNS. DigiSpeed. Instruction manual. Version 1.0. Copyright 2004 Homann Designs.

HOMANN DESIGNS. DigiSpeed. Instruction manual. Version 1.0. Copyright 2004 Homann Designs. HOMANN DESIGNS DigiSpeed Instruction manual Version 1.0 Copyright 2004 Homann Designs http://www.homanndesigns.com Table of Contents Introduction...3 Features...3 DigiSpeed Operation Description...5 Overview...5

More information

Orion-S GPS Receiver Software Validation

Orion-S GPS Receiver Software Validation Space Flight Technology, German Space Operations Center (GSOC) Deutsches Zentrum für Luft- und Raumfahrt (DLR) e.v. O. Montenbruck Doc. No. : GTN-TST-11 Version : 1.1 Date : July 9, 23 Document Title:

More information

DS1720 ECON-Digital Thermometer and Thermostat

DS1720 ECON-Digital Thermometer and Thermostat www.maxim-ic.com FEATURES Requires no external components Supply voltage range covers from 2.7V to 5.5V Measures temperatures from 55 C to +125 C in 0.5 C increments. Fahrenheit equivalent is 67 F to +257

More information

Simulation Results of Alternative Methods for Formation Separation Control

Simulation Results of Alternative Methods for Formation Separation Control Simulation Results of Alternative Methods for Formation Separation Control Thomas Heine, Charles Bussy-Virat, Mark Moldwin, Aaron Ridley Department of Climate and Space Sciences and Engineering University

More information

NMEA 2000 Parameter Group Numbers and Description as of August 2007 NMEA 2000 DB Ver

NMEA 2000 Parameter Group Numbers and Description as of August 2007 NMEA 2000 DB Ver Category General & or Mandatory ISO Acknowledgment This message is provided by ISO 11783 for a handshake mechanism between transmitting and receiving devices. This message is the possible response to acknowledge

More information

THE TIME DISTRIBUTION SYSTEM FOR THE WIDE AREA AUGMENTATION SYSTEM (WAAS)

THE TIME DISTRIBUTION SYSTEM FOR THE WIDE AREA AUGMENTATION SYSTEM (WAAS) 30th Annual Precise Time and Time Interval (PTTI, Meeting THE TIME DISTRIBUTION SYSTEM FOR THE WIDE AREA AUGMENTATION SYSTEM (WAAS) William J. Klepczynski Innovative Solutions International, Inc. 1608

More information

C3-470B Jnavi SPECSHEET

C3-470B Jnavi SPECSHEET HighPerformance GPS Receiver C3-470B Jnavi SPECSHEET MODEL NAME GR C3-470B - XXXX - T - P CODE NO. CUSTOMER MODEL NAME C3-470B INVESTIGATION INSPECTION APPROVAL 1/19 HighPerformance GPS Receiver Contents

More information

Design of Xilinx Based Telemetry System Using Verilog

Design of Xilinx Based Telemetry System Using Verilog Design of Xilinx Based Telemetry System Using Verilog N. P. Lavanya Kumari 1, A. Sarvani 2, K. S. S. Soujanya Kumari 3, L. Y. Swathi 4, M. Purnachandra Rao 5 1 Assistant.Professor (C), Department of Systems

More information

Configuring the Global Navigation Satellite System

Configuring the Global Navigation Satellite System Configuring the Global Navigation Satellite System Effective Cisco IOS-XE Release 3.17, the Cisco ASR-920-12SZ-IM router uses a satellite receiver, also called the global navigation satellite system (GNSS),

More information

SonoLab Echo-I User Manual

SonoLab Echo-I User Manual SonoLab Echo-I User Manual Overview: SonoLab Echo-I is a single board digital ultrasound pulse-echo solution. The system has a built in 50 volt high voltage generation circuit, a bipolar pulser, a transmit/receive

More information

ME218C 2018 Communications Protocol. Revision # 1 5/7/18 Initial Draft /10/18 Meet w/ Karl /11/18 Update State Diagrams to Reflect Unpair

ME218C 2018 Communications Protocol. Revision # 1 5/7/18 Initial Draft /10/18 Meet w/ Karl /11/18 Update State Diagrams to Reflect Unpair ME218C 2018 Communications Protocol Revision # 1 5/7/18 Initial Draft 1.1 5/10/18 Meet w/ Karl 1.2 5/11/18 Update State Diagrams to Reflect Unpair 1.3 5/17/18 Standardizing Ship Pairing Addresses 1.4 5/28/18

More information

GLOBAL POSITIONING SYSTEMS

GLOBAL POSITIONING SYSTEMS GLOBAL POSITIONING SYSTEMS GPS & GIS Fall 2017 Global Positioning Systems GPS is a general term for the navigation system consisting of 24-32 satellites orbiting the Earth, broadcasting data that allows

More information

LORD MANUAL 3DM-GQ4-45. Data Communications Protocol

LORD MANUAL 3DM-GQ4-45. Data Communications Protocol LORD MANUAL 3DM-GQ4-45 Communications Protocol 1 2015 LORD Corporation MicroStrain Sensing Systems 459 Hurricane Lane Suite 102 Williston, VT 05495 United States of America Phone: 802-862-6629 Fax: 802-863-4093

More information

Introduction to Global Navigation Satellite System (GNSS) Signal Structure

Introduction to Global Navigation Satellite System (GNSS) Signal Structure Introduction to Global Navigation Satellite System (GNSS) Signal Structure Dinesh Manandhar Center for Spatial Information Science The University of Tokyo Contact Information: dinesh@iis.u-tokyo.ac.jp

More information

Telemetry formats and equations of Painani-2 Satellite

Telemetry formats and equations of Painani-2 Satellite Telemetry formats and equations of Painani-2 Satellite Uplink and Downlink telemetry commands have a special format. This commands have 2 as header (the header always will be the same, it is M, X in ASCII

More information

The Global Positioning System

The Global Positioning System The Global Positioning System Principles of GPS positioning GPS signal and observables Errors and corrections Processing GPS data GPS measurement strategies Precision and accuracy E. Calais Purdue University

More information

Key Modules For Your Success SKYTRAQ. GPS Module MG-ST1315. UUser s Manual Ver 展得國際有限公司

Key Modules For Your Success SKYTRAQ. GPS Module MG-ST1315. UUser s Manual Ver 展得國際有限公司 SKYTRAQ GPS Module MG-ST1315 UUser s Manual Ver 1.01 1. IntroductionT 1.1 Overview Modulestek GPS module MG-ST1315 is a high sensitivity, low power consumption; compact size GPS module designed for a broad

More information

Know your energy. Modbus Register Map EM etactica Power Meter

Know your energy. Modbus Register Map EM etactica Power Meter Know your energy Modbus Register Map EM etactica Power Meter Revision history Version Action Author Date 1.0 Initial document KP 25.08.2013 1.1 Document review, description and register update GP 26.08.2013

More information

Binary Inputs. Ref.-No. KNX universal binary input, 8-gang. ETS-product family: Series embodiment (SE-) device (2 units) Ref.-No.

Binary Inputs. Ref.-No. KNX universal binary input, 8-gang. ETS-product family: Series embodiment (SE-) device (2 units) Ref.-No. Binary s 1 L1 L2 L3 N E1 N1 E2 N2 E3 N3 E4 N4 KNX + - 2 1 KNX universal binary input, 4-gang ETS-product family: Product type: Series embodiment (SE-) device (2 units) Ref.-No. 2114 REG 4-gang binary input

More information

Compact Data Transmission Standard for High-Precision GPS

Compact Data Transmission Standard for High-Precision GPS Compact Data Transmission Standard for High-Precision GPS Dr. Nicholas C. Talbot Trimble Navigation BIOGRAPHY Nicholas Talbot graduated from the Royal Melbourne Institute of Technology, Australia, with

More information

DRG-Series. Digital Radio Gateway. Tait P25 CCDI Tier-2 (TM9400 Series Mobile Radio) Digital Radio Supplement

DRG-Series. Digital Radio Gateway. Tait P25 CCDI Tier-2 (TM9400 Series Mobile Radio) Digital Radio Supplement DRG-Series Digital Radio Gateway Tait P25 CCDI Tier-2 (TM9400 Series Mobile Radio) Digital Radio Supplement DRG-Series Digital Radio Gateway Tait P25 CCDI Tier-2 (TM9400 Series Mobile Radio) Digital Radio

More information

Quasi-Zenith Satellite System Interface Specification Positioning Technology Verification Service (IS-QZSS-TV-001)

Quasi-Zenith Satellite System Interface Specification Positioning Technology Verification Service (IS-QZSS-TV-001) Quasi-Zenith Satellite System Interface Specification Positioning Technology Verification Service (IS-QZSS-TV-001) (April 13, 2018) Cabinet Office Disclaimer of Liability The Cabinet Office, Government

More information

WWVB Receiver/Decoder With Serial BCD or ASCII Interface DESCRIPTION FEATURES APPLICATIONS

WWVB Receiver/Decoder With Serial BCD or ASCII Interface DESCRIPTION FEATURES APPLICATIONS Linking computers to the real world WWVB Receiver/Decoder With Serial BCD or ASCII Interface DESCRIPTION General The Model 321BS provides computer readable time and date information based on the United

More information

WWVB Receiver/Decoder Module With Serial BCD Interface DESCRIPTION FEATURES APPLICATIONS

WWVB Receiver/Decoder Module With Serial BCD Interface DESCRIPTION FEATURES APPLICATIONS Linking computers to the real world WWVB Receiver/Decoder Module With Serial BCD Interface DESCRIPTION General The Model 321BS provides computer readable time and date information based on the United States

More information

3.0 Payload Sensors Subsystem

3.0 Payload Sensors Subsystem 3.0 Payload Sensors Subsystem If the C&DH subsystem is the brain of the CubeSat, then the Payload Sensors Subsystem is the eyes and nose of the CubeSat. The payload sensors subsystem consists of several

More information

GPS-41EBR GPS-41EBF. GPS Receiver Module GPS-41EB. Fast Acquisition Enhanced Sensitivity 12 Channel GPS Sensor Module FEATURES. Ordering Information

GPS-41EBR GPS-41EBF. GPS Receiver Module GPS-41EB. Fast Acquisition Enhanced Sensitivity 12 Channel GPS Sensor Module FEATURES. Ordering Information FEATURES 12 parallel channel GPS receiver 4000 simultaneous time-frequency search bins SBAS (WAAS, EGNOS) support High Sensitivity: -140dBm acquisition sensitivity -150dBm tracking sensitivity Fast Acquisition:

More information

Configuring the Global Navigation Satellite System

Configuring the Global Navigation Satellite System Configuring the Global Navigation Satellite System uses a satellite receiver, also called the global navigation satellite system (GNSS), as a new timing interface. In typical telecom networks, synchronization

More information

TAPR TICC Timestamping Counter Operation Manual. Introduction

TAPR TICC Timestamping Counter Operation Manual. Introduction TAPR TICC Timestamping Counter Operation Manual Revised: 23 November 2016 2016 Tucson Amateur Packet Radio Corporation Introduction The TAPR TICC is a two-channel timestamping counter ("TSC") implemented

More information

Firmware Development of the LAICE Instrument Interface Board (LIIB)

Firmware Development of the LAICE Instrument Interface Board (LIIB) Firmware Development of the LAICE Instrument Interface Board (LIIB) Samiksha Arora Thesis submitted to the Faculty of the Virginia Polytechnic Institute and State University in partial fulfillment of the

More information

KOMPSAT-2 Orbit Determination using GPS SIgnals

KOMPSAT-2 Orbit Determination using GPS SIgnals Presented at GNSS 2004 The 2004 International Symposium on GNSS/GPS Sydney, Australia 6 8 December 2004 KOMPSAT-2 Orbit Determination using GPS SIgnals Dae-Won Chung KOMPSAT Systems Engineering and Integration

More information

RADIO FREQUENCY AND MODULATION SYSTEMS PART 1: EARTH STATIONS AND SPACECRAFT

RADIO FREQUENCY AND MODULATION SYSTEMS PART 1: EARTH STATIONS AND SPACECRAFT Draft Recommendations for Space Data System Standards RADIO FREQUENCY AND MODULATION SYSTEMS PART 1: EARTH STATIONS AND SPACECRAFT DRAFT RECOMMENDED STANDARD CCSDS 401.0-B-27.1 RED/PINK SHEETS August 2017

More information

UniTraQ OEM Module. GT-310F (Flash version) Fast Acquisition Enhanced Sensitivity 12 Channel GPS Sensor Module. Features

UniTraQ OEM Module. GT-310F (Flash version) Fast Acquisition Enhanced Sensitivity 12 Channel GPS Sensor Module. Features UniTraQ OEM Module Features 12 parallel channel GPS receiver 4000 simultaneous time-frequency search bins SBAS (WAAS, EGNOS) support Programmable Flash version -140dBm acquisition sensitivity -150dBm tracking

More information

t =1 Transmitter #2 Figure 1-1 One Way Ranging Schematic

t =1 Transmitter #2 Figure 1-1 One Way Ranging Schematic 1.0 Introduction OpenSource GPS is open source software that runs a GPS receiver based on the Zarlink GP2015 / GP2021 front end and digital processing chipset. It is a fully functional GPS receiver which

More information

High Data Rate QPSK Modulator with CCSDS Punctured FEC channel Coding for Geo-Imaging Satellite

High Data Rate QPSK Modulator with CCSDS Punctured FEC channel Coding for Geo-Imaging Satellite International Journal of Advances in Engineering Science and Technology 01 www.sestindia.org/volume-ijaest/ and www.ijaestonline.com ISSN: 2319-1120 High Data Rate QPSK Modulator with CCSDS Punctured FEC

More information

Worst-Case GPS Constellation for Testing Navigation at Geosynchronous Orbit for GOES-R

Worst-Case GPS Constellation for Testing Navigation at Geosynchronous Orbit for GOES-R Worst-Case GPS Constellation for Testing Navigation at Geosynchronous Orbit for GOES-R Kristin Larson, Dave Gaylor, and Stephen Winkler Emergent Space Technologies and Lockheed Martin Space Systems 36

More information

SAT ARGOS INSTRUCTION MANUAL

SAT ARGOS INSTRUCTION MANUAL INSTRUCTION MANUAL 7/01 COPYRIGHT (c) 2000-2001 CAMPBELL SCIENTIFIC, INC. This is a blank page. Warranty and Assistance The is warranted by CAMPBELL SCIENTIFIC, INC. to be free from defects in materials

More information

DS1802 Dual Audio Taper Potentiometer With Pushbutton Control

DS1802 Dual Audio Taper Potentiometer With Pushbutton Control www.dalsemi.com FEATURES Ultra-low power consumption Operates from 3V or 5V supplies Two digitally controlled, 65-position potentiometers including mute Logarithmic resistive characteristics (1 db per

More information

Applying Multisensor Information Fusion Technology to Develop an UAV Aircraft with Collision Avoidance Model

Applying Multisensor Information Fusion Technology to Develop an UAV Aircraft with Collision Avoidance Model 1 Applying Multisensor Information Fusion Technology to Develop an UAV Aircraft with Collision Avoidance Model {Final Version with

More information

GEM - Generic Engineering Model Overview

GEM - Generic Engineering Model Overview GEM - Generic Engineering Model 2 Introduction The GEM has been developed by ISIS with the ambition to offer a starting point for new nanosatellite missions. The system allows satellite developers to get

More information

Configuring the Global Navigation Satellite System

Configuring the Global Navigation Satellite System Configuring the Global Navigation Satellite System Effective Cisco IOS-XE Release 3.17, the Cisco ASR 903 (with RSP3 module) and Cisco ASR 907 router uses a satellite receiver, also called the global navigation

More information

Lecture 3: Modulation & Clock Recovery. CSE 123: Computer Networks Alex C. Snoeren

Lecture 3: Modulation & Clock Recovery. CSE 123: Computer Networks Alex C. Snoeren Lecture 3: Modulation & Clock Recovery CSE 123: Computer Networks Alex C. Snoeren Lecture 3 Overview Signaling constraints Shannon s Law Nyquist Limit Encoding schemes Clock recovery Manchester, NRZ, NRZI,

More information

CONTENTS. Operation File name (TH-D72_) CONTENTS 1 OPERATING THROUGH REPEATERS... REPEATER. 01_REPEATER_E.pdf MEMORY CHANNELS...

CONTENTS. Operation File name (TH-D72_) CONTENTS 1 OPERATING THROUGH REPEATERS... REPEATER. 01_REPEATER_E.pdf MEMORY CHANNELS... CONTENTS Operation File name (TH-D72_) OPERATING THROUGH REPEATERS... REPEATER REPEATER ACCESS... 1 Selecting an Offset Direction... 1 Selecting an Offset Frequency... 1 Activating the Tone Function...

More information

ONCORE ENGINEERING NOTE M12 Oncore

ONCORE ENGINEERING NOTE M12 Oncore ONCORE ENGINEERING NOTE M12 Oncore 1. Product Specifications 2. Basic Description 3. Mechanical 4. Environmental 5. Electrical 6. RF Characteristics of Receiver 7. RF Requirements for Antenna 8. Performance

More information