Effective Strategies for Satellite Communications RFI Mitigation
|
|
- Walter Carpenter
- 6 years ago
- Views:
Transcription
1 Effective Strategies for Satellite Communications RFI Mitigation Daniel L Oltrogge, SDC Program Manager Haroon Rashid, Sr Advisory Software Dev & Sr. Member, IEEE ESTEL Conference, Roma, Italy, 4 Oct 2012
2 Introduction Radio Frequency Interference (RFI) of Great Importance CSSI: Center for Space Standards & Innovation Goal of space standards is to help facilitate cooperative, sustainable and commercially-viable use of space Many of CSSI s innovations focused on detection and mitigation of collision & RFI threats RF Interference is current topic in Space News RFI has a large impact on the business of commercial SatCom ($Millions) due to lost bandwidth and transmission delays 2 of 30
3 Effective Strategies for Satellite RFI Mitigation Describe coupling of authoritative satellite operator data & capable analysis framework Provide space operators timely, actionable RFI mitigation Facilitate pre-emptive avoidance of anticipated RFI events while proactively identifying and quickly mitigating others Discuss RFI geolocation testing and simulation activities using satellite operator data Suggest Figures-of-Merit for pre-computed RFI solution sets 3 of 30
4 Most Problematic RFI Paths: 2 RFI types difficult to mitigate: Satellites-to/from-Ground Inter-Satellite vs GEO-to-Ground RFIs are either unintentional Bad Equipment, mistaken schedules or polarities, or Fly-By (LEOP or drifting) satellites or intentional (jamming/dos) Occurrence of intentional jamming varies by operator and satellite location, but is typically rare (<< 1%) Source: ITU Recommendation ITU-R S of 30
5 Typical Operator Workflow for RFI Mitigation Triggered by carrier monitoring or customer report Interference detected or reported Level 2 team investigates L2 specialists for persistent, complex RFI - Dedicated effort on RFI cases - Mitigation expertise (tools, carrier monitoring, DSP, geolocation, industry databases) - Liaise with all parties - Customer(s), Sales Engr., Suspected Source L1 Ops Center Priority: Restore service - Degraded but still operating? - Outage, can service be relocated? After restoring service: - Identify RFI - Remove RFI Trouble Ticket created 24x7 Level 1 Operations Center investigates Interference resolved? Escalate to Level 2 No Interference resolved? Yes 15% of tickets escalated to L2 Staff Inform 24x7 Ops Centers for restoration of affected services No Further actions: - Continue to investigate w/other orgs. - Seek corrective actions w/rfi source - ASI Operator actions - Legal/regulatory Yes Trouble Ticket closed Trouble Ticket closed 5 of 30
6 Typical RFI Incidents for Large GEO Operators Intermodulation 9% CW 7% Number of Tickets Sweeper 4% Unknown 1% Re-Transmit/ Re-Broadcast 4% ASI 19% Compression 1% RFI data based on number of tickets for each interference type 368 events, covering 30 satellites Better Metric: Weight incidents based upon affected bandwidth and time to resolve Cross-Pol 24% Source of data: Satellite Operator tickets, Dec 2010-May 2011 Major problems are Co-pol and Cross-pol (from Operator s own customers), followed by ASI Co-Pol 31% Level 1 Team fixes Co-pol, Cross-pol Bandwidth*Time to Resolve Sweeper Unknown Re-Transmit/Re- 6% 0% Broadcast 2% ASI Intermodulation 37% 6% CW 1% Cross-Pol 29% Adjacent Satellite Interference (ASI) is single largest RFI problem (37%) due to extensive ASI mitigation time Co-Pol 18% Source of data: Satellite Operator tickets Dec 2010-May 2011 Compression 1% 6 of 30
7 Adjacent Satellite Interference (ASI) ASI caused by [unintentional] multi-path of interfering signal thru interfered comm. satellite 7 of 30
8 Analytical Indication of Interference: ASI characterization: Crudely approximated by boresight off-axis angle [ Carrier ] [ Noise Interference] Occurs when < Receiver Sensitivity Limit 8 of 30
9 ASI Mitigation Via RFI Geolocation COTS capabilities already exist to perform highly accurate RFI geolocation Time and Frequency Difference of Arrival Interferometrics, Glowlink, RT Logic, Siemans Utilized by large space operators We re often tempted by new technical solutions But existing COTS solutions very good if not data-starved Process improvement = biggest RFI mitigation gain AGI investigated benefit of injecting most current/actionable data into geolocation process Initial finding: 30x improvement in FDOA location 9 of 30
10 Multiple RFI Geolocation Approaches Exist: RFI geolocation determines interferer location Geolocation one of principal RFI mitigation tools today At least 5 geolocation technique broad categories: TDOA, FDOA or combined TDOA/FDOA-based methods Received signal power amplitude (RSPA) analysis based on a single pre-determined antenna pattern RSPA methods using an array of two or more antennas with pre-determined antenna patterns Angle of Arrival (AOA) using two simultaneous measurements of azimuth/elevation Line-of-Bearing, using two simultaneous measurements on two platforms or measurements at 2 separate times 10 of 30
11 TDOA/FDOA Typical Results Combining TDOA & FDOA measurements of two adjacent satellites yields a geolocation solution: 11 of 30
12 Space Data Association Overview SDA Executive Members: Chief Technology Adviser / SDC Operator: Commercial enterprise (NCAGE Code: U0HJ4) Space Data Center Verified, normalized data Automated analysis/reporting Open to all satellite operators in all orbital regimes Additional participants: Arabsat, Avanti, EchoStar, GeoEye, GE Satellite, NASA, NOAA, Optus, Paradigm, Space Systems/Loral, StarOne, Telesat Canada Strong legal agreements protect member information from disclosure/misuse 12 of 30
13 Motivations for SDA s Creation Enhance Safety of flight Definition: The condition where satellites are positioned and operated in a manner that preserves their long-term operational viability, the long-term operational viability of any other satellites, and the preservation of the orbital regime(s) involved EMI/RFI Geolocation and Resolution Support More rapidly find and address interference sources Efficient, timely, accurate conjunction assessments Consolidate and use best available data from operators, including planned maneuvers Reduce false alarms, missed events Minimize member time and resources devoted to CA SSA / Format Conversions / Information Repository Minimize confusion, potential for conflicting decisions Encourage evolution of best practices for Members SDA Enhances Satellite Operations & Lowers Operational Costs13 of 30
14 Space Data Center as Key RFI Mitigation Tool Collision Avoidance monitoring, maneuver planning & flight safety Radio Frequency Interference mitigation & geo-location support Authoritative contact info (ops center POCs) for SDA member satellites Space Data Center (SDC) currently supporting 231 satellites from 15 GEO operators and 110 satellites from 7 LEO operators 341 Sats 14 of 30
15 SDA RFI Planned Process Flow Members contribute and dynamically maintain proprietary RF data: Freq plan; polarization; translation freqs; antenna patterns, Rx & Tx chars, beam coverage Members contribute data on Reference Emitters/Calibrators Satellite ephemerides are automatically updated by all SDA members Members detect an RFI event and report the details to the SDC SDC Data stored in common format Frequency bands and beam coverages searched for suitable adjacent satellites for geolocation measurements Database queried for most likely region, satellite(s), and contact information to investigate potential interference source Get reliable contacts for other Operators, to investigate RFI Search RFI case studies from RFI database, to help find similar events Geolocation solution sets generated and sent to Member in format for geolocation system Optional information provided to third parties for geolocation or other services Flyby notification to warn of possible interference RFI Alert notification sent to Members System allows faster investigation of RFI events, improving service quality and creating more efficient operations 16 of 30
16 Summary of SDA s Technical Approach SDA striving to aggregate largest set of authoritative & normalized ephemeris, RF parameters & POCs into analysis Space Data Center to facilitate preemptive, proactive RFI mitigation Dynamically populate SDC s Radio Frequency (RF) database with current and actionable RF data may constitute biggest and most daunting task Once accomplished, however, RF analysts will be able to generate actionable forensic and predictive RF and RFI assessments Pre-generate RFI solution sets 17 of 30
17 RFI Mitigation #1: Pre-emptive Fly-By Analysis Fly-By events include: Satellite relocation to new GEO orbital slot Sea Launch & Arianne Equatorial or 5.3- inclined orbits yield LEOP drift phase with high RFI potential Satellite technicians can de-conflict anticipated RFIs if known in advance Requires sufficient detail is available on all pertinent satellite RF parameters, antenna patterns/orientation and orbital positions 18 of 30
18 Typical Fly-By Preemptive Analysis Product RFI avoidable by orbit maneuver or Tx coordination [Carrier]/[Noise] (db) Interfered Span Time (Seconds) [Carrier]/[Noise] (db) [Carrier]/[Noise + Interference] (db) 19 of 30
19 RFI Mitigation Analysis Cases #2 & #3: Case 1: Fly-By analysis was one example of the preemptive RFI mitigation figures-of-merit that can be generated given sufficient RF data We now examine figures of merit that can be precomputed if satellite operator RF parameters (incl. detailed, well-known antenna pattern) Case 2: RFI from transiting LEO satellite into GEO downlink to ship-based receiving antenna Case 3: RFI from a well-quantified interfering uplink signal impacting an adjacent satellite s communications Case 4: RFI from a well-quantified interfering downlink signal impacting an Earth station 20 of 30
20 RFI Preemptive Analysis Case #2: LEO satellite transits thru GEO downlink to ship-based receiving antenna; can evaluate transit impact Pre-interference nominal Received Signal Predicted Received Signal Including LEO Interference 21 of 30
21 RFI Preemptive Analysis Case #3 Description For this case: Earth station A is transmitting into satellite A Interfering Earth station B (at unknown location but w/known antenna pattern) transmitting into satellite B (2 from A in GEO belt) Assuming: Earth station B and GEO satellite A antenna pointing well-known Satellites A & B positionally well known Then: Can generate contours of [Interference : Noise] at all possible earth station B Tx locations 22 of 30
22 RFI Preemptive Analysis Case #3: Well-quantified uplink RFI into adjacent satellite Such contours + measured received normalized interference level yields a location area of admissibility e.g., Rx interference signal w/normalized power level 3 db above noise likely originates from green region 23 of 30
23 RFI Preemptive Analysis Case #4: Well-quantified downlink from adjacent satellite Identifies admissible interfering satellite antenna pointing e.g., if interfered comm. system withstands 3 db above noise, collaborating operator must avoid orange region 24 of 30
24 Sources of RFI Geolocation Degradation Many factors degrade RFI geolocation accuracy: Ephemeris uncertainty Undersampled orbit observations and time of day variations Selection of satellite pair w/non-synch movement Accumulation of multiple measurements over time ASI relative geometry (incl. Ref in line w/satellites & target) Adjacent satellite RF Compatibility & frequency bandwidth overlap Collector clock synchronization Uncertainty in center frequency and phase noise Geoid and terrain model uncertainties Processing and TDOA measurement errors Ionosphere-induced TDOA and FDOA errors Troposphere-induced path length errors 25 of 30
25 RFI geolocation sensitivity to orbit sampling/quality Gov t-sponsored RFI mitigation test conducted using three adjacent GEOs Jan 2012 Goal is to determine sensitivities to data Results of first test: SDA data 30x improvement in TDOA dimension But also noted distinct nightfavoring accuracy trend in TLEs May stem from systemic undersampling for optical obs 26 of 30
26 RFI geolocation sensitivity to OD w/o Ref. Emitters 27 of 30
27 Figures-of-Merit for Precomputed Sol n Sets Currently evaluating time-varying RFI geolocation degradation errors we can control or quantify FOM GeolocSolnSet = Aσ epha t + Bσ ephb t + C f Geom t + D f RF_Antennas_EIRP_etc + E f(freq_bw_overlap) + Next step: further definition of f(t) alternatives, implementation, simulation and test evaluation 28 of 30
28 Summary: Improving RFI Mitigation Timelines Customer Identifies Interference Issue Exhausted Level 1 Suuport Mitigation Options Schedule & Conduct Geoloc Search for Suitable Adj S/C Define & Exchange RF Search Adj Sats Search Adj Sats,POCs Post- Process, Identify Define & Exchange Ephem Notify Interferer; Resolve Schedule & Conduct Geoloc Search for Suitable Adj S/C Define & Exchange Ephem Post- Process, Identify Schedule & Conduct Geoloc Rectify Ephem Format/ Frame Notify Interferer; Resolve Rectify Ephem Format/ Frame Post- Process, Identify Define & Exchange RF Define & Exchange RF Notify Interferer; Resolve Search for Suitable Adj S/C Search for Suitable Adj S/C Schedule & Conduct Geoloc Schedule & Conduct Geoloc SDC Phonebk, Ephem, RF Alerts, RF Params, Ref Emitters, Precomputed Geoloc Sets Post- Process, Identify Post- Process, Identify SDC Phonebk, Ephem, RF Alerts, RF Params, Ref Emitters Notify Interferer; Resolve SDC Phonebk, Ephem, RF Alerts Notify Interferer; Resolve SDC Phonebk & RFI Alerts None Time from Initial RFI Report (days) 5 29 of 30
29 Questions? 30 of 30
30 Cross-Organizational Data Fusion Radar/Optical sensor shortcoming is inability to predict or account for operators maneuvers SDA implemented workable data fusion concept Multi-source data sharing, orthogonal data and trustbut-verify independent data quality checks Few objects (e.g., <100): Share ephemeris Catalog (>100 RSOs): Adopt AIAA standards approach Astrodynamics Propagation Specifications, Test Cases, and Recommended Practices (ANSI S ) USG focus on improving algorithms; let users implement based on USG-provided governing equations, approach & test cases 31 of 30
31 Important Elements of Data Fusion Quantified uncertainty of inputs Data Alignment Reference Frames Coordinate Systems Time Scales Fundamental Measures of time, distance, and mass Input sequencing and synchronization 32 of 30
Satellite Interference Geolocation Considerations May 2016
Satellite Interference Geolocation Considerations May 2016 Paul Chan, MIEEE, MIET, MSc. Telecommunications Spacecraft Engineer, Asia Satellite Telecommunications Co. Ltd. (AsiaSat) Introduction Interference
More informationOrbital Slots and Spectrum Use in an Era of Interference
Orbital Slots and Spectrum Use in an Era of Interference Brussels-Belgium (9 th October-2014) Yasir Hassan Director, Transmission Operations Arabsat in glance an IGO established in 1976 6 orbital locations,
More informationAn Evaluation of CubeSat Orbital Decay
SSC11-VII-2 An Evaluation of CubeSat Orbital Decay AGI s Center for Space Stds &Innovation CEO, 1Earth Research Dan Oltrogge SRI International, Inc. Kyle Leveque Contents The CubeSat Historical Manifest
More informationIntegrity of Satellite Navigation in the Arctic
Integrity of Satellite Navigation in the Arctic TODD WALTER & TYLER REID STANFORD UNIVERSITY APRIL 2018 Satellite Based Augmentation Systems (SBAS) in 2018 2 SBAS Networks in 2021? 3 What is Meant by Integrity?
More informationApplication of a Dual Satellite Geolocation System on Locating Sweeping Interference
Application of a Dual Satellite Geolocation System on Locating Sweeping Interference M. H. Chan Abstract This paper describes an application of a dual satellite geolocation (DSG) system on identifying
More informationEvent Detection From RF Sensing Space Symposium 2018 Technical Track. 16 April 2018
Event Detection From RF Sensing Space Symposium 2018 Technical Track 16 April 2018 RF Sensing Background In 2010 Kratos RT Logic created a commercial network of SATCOM RF EMI Monitoring and Geolocation
More informationICG-12 Kyoto Japan WG-B December Dr. Lisa Mazzuca
ICG-12 Kyoto Japan WG-B December 5 2017 Dr. Lisa Mazzuca MEOSAR: SPACE SEGMENT BDS & Cospas-Sarsat: C-S JC-31 (Oct 2017) China Working Papers BDS 406 MHz MEOSAR REPEATER TECHNOLOGY STATUS (JC31-9/2) Executive
More informationFREQUENCY DECLARATION FOR THE ARGOS-4 SYSTEM. NOAA-WP-40 presents a summary of frequency declarations for the Argos-4 system.
Prepared by CNES Agenda Item: I/1 Discussed in WG1 FREQUENCY DECLARATION FOR THE ARGOS-4 SYSTEM NOAA-WP-40 presents a summary of frequency declarations for the Argos-4 system. FREQUENCY DECLARATION FOR
More informationAir Force Institute of Technology. A CubeSat Mission for Locating and Mapping Spot Beams of GEO Comm-Satellites
Air Force Institute of Technology A CubeSat Mission for Locating and Mapping Spot Beams of GEO Comm-Satellites Lt. Jake LaSarge PI: Dr. Jonathan Black Dr. Brad King Dr. Gary Duke August 9, 2015 1 Outline
More informationJager UAVs to Locate GPS Interference
JIFX 16-1 2-6 November 2015 Camp Roberts, CA Jager UAVs to Locate GPS Interference Stanford GPS Research Laboratory and the Stanford Intelligent Systems Lab Principal Investigator: Sherman Lo, PhD Area
More informationSatellite Link Budget 6/10/5244-1
Satellite Link Budget 6/10/5244-1 Link Budgets This will provide an overview of the information that is required to perform a link budget and their impact on the Communication link Link Budget tool Has
More informationSIECAMS. Siemens Space. SIECAMS Siemens Satellite Monitoring System. Siemens AG Austria All rights reserved.
Siemens Space SIECAMS Siemens Satellite Monitoring System Siemens AG Austria 2010. All rights reserved. Benefits Multi-site and multi-satellite system based on state of the art SW technology Less investment
More information2015 Interference 101. Robin Jackman Application Engineer
2015 Interference 101 Robin Jackman Application Engineer Agenda What is Interference Introduction Definitions Spectrum Analyzer Concepts Concepts, Controls, Displays Making good measurements Measuring
More informationDeep Space Communication The further you go, the harder it gets. D. Kanipe, Sept. 2013
Deep Space Communication The further you go, the harder it gets D. Kanipe, Sept. 2013 Deep Space Communication Introduction Obstacles: enormous distances, S/C mass and power limits International Telecommunications
More informationThe fight against interference
Satellite Interference Satmotion Pocket is an excellent tool for accelerating VSAT installation productivity while enforcing interference prevention The fight against interference Interference is a tricky
More informationWorst-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 informationSmall Satellites: The Execution and Launch of a GPS Radio Occultation Instrument in a 6U Nanosatellite
Small Satellites: The Execution and Launch of a GPS Radio Occultation Instrument in a 6U Nanosatellite Dave Williamson Director, Strategic Programs Tyvak Tyvak: Satellite Solutions for Multiple Organizations
More informationW-Band Satellite Transmission in the WAVE Mission
W-Band Satellite Transmission in the WAVE Mission A. Jebril, M. Lucente, M. Ruggieri, T. Rossi University of Rome-Tor Vergata, Dept. of Electronic Engineering, Via del Politecnico 1, 00133 Rome - Italy
More informationMultiple Access. Difference between Multiplexing and Multiple Access
Multiple Access (MA) Satellite transponders are wide bandwidth devices with bandwidths standard bandwidth of around 35 MHz to 7 MHz. A satellite transponder is rarely used fully by a single user (for example
More informationCGMS Agency Best Practices in support to Local and Regional Processing of LEO Direct Broadcast data for Achieving
CGMS Agency Best Practices in support to Local and Regional Processing of LEO Direct Broadcast data for Achieving User Readiness for New Meteorological Satellites Best Practices for Achieving User Readiness
More informationThe Effect of Radio Frequency Interference on GNSS Signals and Mitigation Techniques Presented by Dr. Tarek Attia
International Conference and Exhibition Melaha2016 GNSS WAY Ahead 25-27 April2016, Cairo, Egypt The Effect of Radio Frequency Interference on GNSS Signals and Mitigation Techniques Presented by Dr. Tarek
More informationEmergency Locator Signal Detection and Geolocation Small Satellite Constellation Feasibility Study
Emergency Locator Signal Detection and Geolocation Small Satellite Constellation Feasibility Study Authors: Adam Gunderson, Celena Byers, David Klumpar Background Aircraft Emergency Locator Transmitters
More informationOverview: Radio Frequency Spectrum
Overview: Radio Frequency Spectrum Krystal Wilson, Secure World Foundation Working Group on Spectrum and Operational Challenges with the Emergence of Small Satellites 15 th Space Generation Congress Guadalajara,
More informationChannel Modeling ETIN10. Wireless Positioning
Channel Modeling ETIN10 Lecture no: 10 Wireless Positioning Fredrik Tufvesson Department of Electrical and Information Technology 2014-03-03 Fredrik Tufvesson - ETIN10 1 Overview Motivation: why wireless
More informationCubeSat Integration into the Space Situational Awareness Architecture
CubeSat Integration into the Space Situational Awareness Architecture Keith Morris, Chris Rice, Mark Wolfson Lockheed Martin Space Systems Company 12257 S. Wadsworth Blvd. Mailstop S6040 Littleton, CO
More informationSatellite Communications. Chapter 9
Satellite Communications Chapter 9 Satellite-Related Terms Earth Stations antenna systems on or near earth Uplink transmission from an earth station to a satellite Downlink transmission from a satellite
More informationSatellite Communications. Chapter 9
Satellite Communications Chapter 9 Satellite-Related Terms Earth Stations antenna systems on or near earth Uplink transmission from an earth station to a satellite Downlink transmission from a satellite
More informationCoordination and Analysis of GSO Satellite Networks
Coordination and Analysis of GSO Satellite Networks BR-SSD e-learning Center BR / SSD / SNP 1 Summary: 1) How to Identify Satellite Networks and other Systems for which Coordination is Required? 2) Several
More informationExploring Trends in Technology and Testing in Satellite Communications
Exploring Trends in Technology and Testing in Satellite Communications Aerospace Defense Symposium Giuseppe Savoia Keysight Technologies Agenda Page 2 Evolving military and commercial satellite communications
More informationIan D Souza (1), David Martin (2)
NANO-SATTELITE DEMONSTRATION MISSION: THE DETECTION OF MARITIME AIS SIGNALS FROM LOW EARTH ORBIT SMALL SATELLITE SYSTEMS AND SERVICES SYMPOSIUM Pestana Conference Centre Funchal, Madeira - Portugal 31
More informationAutomated Terrestrial EMI Emitter Detection, Classification, and Localization 1
Automated Terrestrial EMI Emitter Detection, Classification, and Localization 1 Richard Stottler James Ong Chris Gioia Stottler Henke Associates, Inc., San Mateo, CA 94402 Chris Bowman, PhD Data Fusion
More informationUTILIZATION OF AN IEEE 1588 TIMING REFERENCE SOURCE IN THE inet RF TRANSCEIVER
UTILIZATION OF AN IEEE 1588 TIMING REFERENCE SOURCE IN THE inet RF TRANSCEIVER Dr. Cheng Lu, Chief Communications System Engineer John Roach, Vice President, Network Products Division Dr. George Sasvari,
More informationReal-Time Spectrum Monitoring System Provides Superior Detection And Location Of Suspicious RF Traffic
Real-Time Spectrum Monitoring System Provides Superior Detection And Location Of Suspicious RF Traffic By Malcolm Levy, Vice President, Americas, CRFS Inc., California INTRODUCTION TO RF SPECTRUM MONITORING
More informationTechnical and Regulatory Studies on HAPS
Technical and Regulatory Studies on HAPS 04 December 2008 Jong Min Park Contents 1. Overview of HAPS 2. Frequency identifications for HAPS 3. Technical and regulatory conditions for HAPS 4. Conclusions
More informationRecommendation ITU-R M (09/2015)
Recommendation ITU-R M.1906-1 (09/2015) Characteristics and protection criteria of receiving space stations and characteristics of transmitting earth stations in the radionavigation-satellite service (Earth-to-space)
More informationBasic Satellite Communication. Thaicom Customer and Network Services Department
Basic Satellite Communication Thaicom Customer and Network Services Department Satellite Communication System Control & Monitoring Station Satellite Space Segment Uplink Signals Downlink Signals Receive
More informationAssessing & Mitigation of risks on railways operational scenarios
R H I N O S Railway High Integrity Navigation Overlay System Assessing & Mitigation of risks on railways operational scenarios Rome, June 22 nd 2017 Anja Grosch, Ilaria Martini, Omar Garcia Crespillo (DLR)
More informationKeynote Speaker: TS Kelso, A Personal Journey
Space Traffic Management Conference 2018 Seeking Sustainable Solutions Jan 18th, 9:00 AM - 9:30 AM Keynote Speaker: TS Kelso, A Personal Journey TS Kelso AGI / Space Data Association Follow this and additional
More information737 LF/HF/VHF/UHF/SHF Spectrum Monitoring System
737 LF/HF/VHF/UHF/SHF Spectrum Monitoring System The ITU-Compliant TCI Model 737 is the highest performance member of TCI s 700 series of fieldproven Spectrum Monitoring Systems (SMS), which addresses
More informationTELECOMMUNICATION SATELLITE TELEMETRY TRACKING AND COMMAND SUB-SYSTEM
TELECOMMUNICATION SATELLITE TELEMETRY TRACKING AND COMMAND SUB-SYSTEM Rodolphe Nasta Engineering Division ALCATEL ESPACE Toulouse, France ABSTRACT This paper gives an overview on Telemetry, Tracking and
More information2009 CubeSat Developer s Workshop San Luis Obispo, CA
Exploiting Link Dynamics in LEO-to-Ground Communications 2009 CubeSat Developer s Workshop San Luis Obispo, CA Michael Caffrey mpc@lanl.gov Joseph Palmer jmp@lanl.gov Los Alamos National Laboratory Paper
More informationSatellite Interference: an Operator s Perspective. 10 June 2013
Satellite Interference: an Operator s Perspective 10 June 2013 1 Why are we here? Addressing concerns of satellite industry, policymakers and citizens Satellite Operator Mission: provide customers access
More informationSpace Traffic Management
Space Traffic Management Brian Weeden Asangire Oprong United States Kenya Space Traffic Management 1 Ben Baseley-Walker United Kingdom Overview The Problem ISU Report Conclusions and Recommendations Future
More informationSPACE SITUATIONAL AWARENESS: IT S NOT JUST ABOUT THE ALGORITHMS
SPACE SITUATIONAL AWARENESS: IT S NOT JUST ABOUT THE ALGORITHMS William P. Schonberg Missouri University of Science & Technology wschon@mst.edu Yanping Guo The Johns Hopkins University, Applied Physics
More informationTACSAT-2 Target Indicator Experiment (TIE) AIS Payload Overview
TACSAT-2 Target Indicator Experiment (TIE) AIS Payload Overview 2007 Maritime Domain Awareness Forum 29 October 2007 NRL_2007-MDAF-29OCT-TIE.1 Christopher Huffine Technical Staff, Code 8120 Naval Research
More informationLeveraging Commercial Communication Satellites to support the Space Situational Awareness Mission Area. Timothy L. Deaver Americom Government Services
Leveraging Commercial Communication Satellites to support the Space Situational Awareness Mission Area Timothy L. Deaver Americom Government Services ABSTRACT The majority of USSTRATCOM detect and track
More informationNetworked Targeting Technology
Networked Targeting Technology Stephen Welby Next Generation Time Critical Targeting Future Battlespace Dominance Requires the Ability to Hold Opposing Forces at Risk: At Any Time In Any Weather Fixed,
More informationmodel 802C HF Wideband Direction Finding System 802C
model 802C HF Wideband Direction Finding System 802C Complete HF COMINT platform that provides direction finding and signal collection capabilities in a single integrated solution Wideband signal detection,
More informationWHITE PAPER: LTE & TELEVISION SERVICES COEXISTENCE REPORT FOR BRAZIL PRODUCED BY ATDI LTD DECEMBER 2013 ON BEHALF OF GSMA
ATDI Ltd The Beehive, City Place Gatwick, West Sussex RH6 0PA UK Tel: + (44) 1 293 522052 www.atdi.co.uk WHITE PAPER: LTE & TELEVISION SERVICES COEXISTENCE REPORT FOR BRAZIL PRODUCED BY ATDI LTD DECEMBER
More informationLOCALIZATION 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 informationSPECTRUM SHARING: OVERVIEW AND CHALLENGES OF SMALL CELLS INNOVATION IN THE PROPOSED 3.5 GHZ BAND
SPECTRUM SHARING: OVERVIEW AND CHALLENGES OF SMALL CELLS INNOVATION IN THE PROPOSED 3.5 GHZ BAND David Oyediran, Graduate Student, Farzad Moazzami, Advisor Electrical and Computer Engineering Morgan State
More informationPropagation Effects Handbook for Satellite Systems Design
ITT Industries Advanced Engineering & Sciences Ashburn, VA 20147 Phone: (703) 858-4061, Fax: (703) 858-4130 E-mail: louis.ippolito@itt.com Abstract This paper describes the latest edition of the NASA and
More informationCarrier to Interference (C /I ratio) Calculations
Carrier to Interference (C /I ratio) Calculations Danny THAM Weng Hoa danny.tham@itu.int BR Space Services Department International Telecommunication Union Section B3, Part B of the Rules of Procedure
More informationThe first videoconference at Q/V Band: a new era of the satellite telecommunication history
COPUOS Scientific and Technical Subcommittee Fifty-second session The first videoconference at Q/V Band: a new era of the satellite telecommunication history Giuseppe Codispoti Italian Space Agency giuseppe.codispoti@asi.it
More informationDigital Communications Theory. Phil Horkin/AF7GY Satellite Communications Consultant
Digital Communications Theory Phil Horkin/AF7GY Satellite Communications Consultant AF7GY@arrl.net Overview Sending voice or data over a constrained channel is a balancing act trading many communication
More informationARTICLE 22. Space services 1
CHAPTER VI Provisions for services and stations RR22-1 ARTICLE 22 Space services 1 Section I Cessation of emissions 22.1 1 Space stations shall be fitted with devices to ensure immediate cessation of their
More informationEarth Science and Applications from Space National Imperatives for the Next Decade and Beyond
Earth Science and Applications from Space National Imperatives for the Next Decade and Beyond Lessons Learned from 2007 Survey Rick Anthes CESAS Meeting Washington, D.C. 3/4/2014 1 ESAS Charge Recommend
More informationSPACE DOMAIN AWARENESS: A GLOBAL CHALLENGE. Konichiwa and thank you Yoshitomi-San for that very kind
SPACE DOMAIN AWARENESS: A GLOBAL CHALLENGE Konichiwa and thank you Yoshitomi-San for that very kind introduction. It is great to be back in Japan and I look forward to the opportunity of seeing many great
More information(650536) Prerequisite: Digital Communications (610533) Instructor: Dr. Abdel-Rahman Al-Qawasmi
Communications & Electronics Engineering Dept. Part 6 Satellite Communications Communication Networks (650536) Prerequisite: Digital Communications (610533) Instructor: Dr. Abdel-Rahman Al-Qawasmi Text
More informationIEEE ax / OFDMA
#WLPC 2018 PRAGUE CZECH REPUBLIC IEEE 802.11ax / OFDMA WFA CERTIFIED Wi-Fi 6 PERRY CORRELL DIR. PRODUCT MANAGEMENT 1 2018 Aerohive Networks. All Rights Reserved. IEEE 802.11ax Timeline IEEE 802.11ax Passed
More informationReport ITU-R SM.2181 (09/2010)
Report ITU-R SM.2181 (09/2010) Use of Appendix 10 of the Radio Regulations to convey information related to emissions from both GSO and non-gso space stations including geolocation information SM Series
More informationRECOMMENDATION ITU-R M * Definition of availability for radiocommunication circuits in the mobile-satellite service
Rec. ITU-R M.828-2 1 RECOMMENDATION ITU-R M.828-2 * Definition of availability for radiocommunication circuits in the mobile-satellite service (Question ITU-R 85/8) (1992-1994-2006) Scope This Recommendation
More informationDRONACHARYA GROUP OF INSTITUTIONS, GREATER NOIDA. SATELLITE COMMUNICATIONS (EEC 021) QUESTION BANK
DRONACHARYA GROUP OF INSTITUTIONS, GREATER NOIDA. SATELLITE COMMUNICATIONS (EEC 021) QUESTION BANK 1. Write the advantages and disadvantages of Satellite Communication. 2. Distinguish between active and
More informationUNIVERSITY OF NAIROBI Radio Frequency Interference in Satellite Communications Systems
UNIVERSITY OF NAIROBI Radio Frequency Interference in Satellite Communications Systems Project No. 090 Mitei Ronald Kipkoech F17/2128/04 Supervisor: Dr.V.K Oduol Examiner: Dr. Gakuru OBJECTIVES To study
More informationAdvanced Radiocommunications. White Paper. Interference mitigation for LTE and television signals in adjacent frequencies. Enter
White Paper Interference mitigation for LTE and television signals in adjacent frequencies Enter Author: Paul Grant ATDI Ltd December 2013 Advanced Radiocommunications Introduction Spectrum is limited,
More informationHarmful Interference to Space Services
Harmful Interference to Space Services BR-SSD e-learning Center BR / SSD / SNP 1 Radiocommunication Sector in brief Strategic Goals: GOOD QUALITY AND LESS COSTLY EQUIPMENT MORE FAVORABLE INVESTMENT ENVIRONMENT
More informationNUMERICAL OPTIMIZATION OF A SATELLITE SHF NULLING MULTIPLE BEAM ANTENNA
NUMERICAL OPTIMIZATION OF A SATELLITE SHF NULLING MULTIPLE BEAM ANTENNA D. Maiarelli (1), R. Guidi (2), G. Galgani (2), V. Lubrano (1), M. Bandinelli (2) (1) Alcatel Alenia Space Italia, via Saccomuro,
More informationRECOMMENDATION ITU-R SNG * Uniform technical standards (analogue) for satellite news gathering (SNG)
Rec. ITU-R SNG.722-1 1 RECOMMENDATION ITU-R SNG.722-1 * Uniform technical standards (analogue) for satellite news gathering (SNG) (1990-1992) The ITU Radiocommunication Assembly, considering a) that satellite
More informationRadio Frequency Interference
Radio Frequency Interference Regional Preparatory Workshop for WRC-19 Mexico City, Mexico 6 7 February, 2018 Mike Biggs Senior Engineer US FAA Spectrum Engineering Services What is Radio Frequency Interference
More informationGNSS Reflectometry and Passive Radar at DLR
ACES and FUTURE GNSS-Based EARTH OBSERVATION and NAVIGATION 26./27. May 2008, TU München Dr. Thomas Börner, Microwaves and Radar Institute, DLR Overview GNSS Reflectometry a joined proposal of DLR and
More information1. Discuss in detail the Design Consideration of a Satellite Communication Systems. [16]
Code No: R05410409 Set No. 1 1. Discuss in detail the Design Consideration of a Satellite Communication Systems. 2. (a) What is a Geosynchronous Orbit? Discuss the advantages and disadvantages of these
More informationHD Radio FM Transmission. System Specifications
HD Radio FM Transmission System Specifications Rev. G December 14, 2016 SY_SSS_1026s TRADEMARKS HD Radio and the HD, HD Radio, and Arc logos are proprietary trademarks of ibiquity Digital Corporation.
More informationDesigning Next-Generation AESA Radar Part 2: Individual Antenna Design
Design Designing Next-Generation AESA Radar Part 2: Individual Antenna Design Figure 8: Antenna design Specsheet user interface showing the electrical requirements input (a), physical constraints input
More informationSubmission on Proposed Methodology for Engineering Licenses in Managed Spectrum Parks
Submission on Proposed Methodology and Rules for Engineering Licenses in Managed Spectrum Parks Introduction General This is a submission on the discussion paper entitled proposed methodology and rules
More informationSECTION 2 BROADBAND RF CHARACTERISTICS. 2.1 Frequency bands
SECTION 2 BROADBAND RF CHARACTERISTICS 2.1 Frequency bands 2.1.1 Use of AMS(R)S bands Note.- Categories of messages, and their relative priorities within the aeronautical mobile (R) service, are given
More informationB ==================================== C
Satellite Space Segment Communication Frequencies Frequency Band (GHz) Band Uplink Crosslink Downlink Bandwidth ==================================== C 5.9-6.4 3.7 4.2 0.5 X 7.9-8.4 7.25-7.7575 0.5 Ku 14-14.5
More informationRECEIVER TYPES AND CHARACTERISTICS
RECEIVER TYPES AND CHARACTERISTICS Besides the considerations of noise and noise figure, the capabilities of receivers are highly dependant on the type of receiver design. Most receiver designs are trade-offs
More informationRegional Radiocommunication Seminar - Dakar March
Regional Radiocommunication Seminar - Dakar 27-31 March 2017 1 RADIO REGULATIONS (RR) 1. RR: Organization and Main concepts 2. International Table of Frequency Allocations (ITFA) 3. Rules of Procedure
More informationChallenging, innovative and fascinating
O3b 2.4m antennas operating in California. Photo courtesy Hung Tran, O3b Networks Challenging, innovative and fascinating The satellite communications industry is challenging, innovative and fascinating.
More information3-2 Configuration for Mobile Communication Satellite System and Broadcasting Satellite Systems
3-2 Configuration for Mobile Communication Satellite System and Broadcasting Satellite Systems KOZONO Shin-ichi To realize S-band mobile satellite communications and broadcasting systems, onboard mission
More informationTechnical Requirements for Wireless Broadband Services (WBS) in the Band MHz
Issue 2 June 2010 Spectrum Management and Telecommunications Standard Radio System Plan Technical Requirements for Wireless Broadband Services (WBS) in the Band 3650-3700 MHz Aussi disponible en français
More informationRECOMMENDATION ITU-R BO.1834*
Rec. ITU-R BO.1834 1 RECOMMENDATION ITU-R BO.1834* Coordination between geostationary-satellite orbit fixed-satellite service networks and broadcasting-satellite service networks in the band 17.3-17.8
More informationSMARTER SOLUTIONS FOR AN UNKNOWN FUTURE
SMARTER SOLUTIONS FOR AN UNKNOWN FUTURE Nicholas Daly Eutelsat UK Limited, 13 May 2015, GVF Aberdeen Courtesy Airbus Defence & Space There are known, knowns. These are things we know that we know. There
More informationAlmost-Optimal Sensor Tasking using Auction Methods Richard S. Hujsak Analytical Graphics, Inc.
Almost-Optimal Sensor Tasking using Auction Methods Richard S. Hujsak Analytical Graphics, Inc. ABSTRACT The problem for efficient use of radar assets for space surveillance is unsolved. Partial solutions
More informationInternational Spectrum Management and Interference Mitigation
International Spectrum Management and Interference Mitigation 1 Related ITU documents Prevention of interference Resolving cases of interference Radiomonitoring as a complementary instrument of interference
More informationASSESSMENT OF THE USE OF C-BAND FOR GNSS AO 5410, closing 30/05/2007
ASSESSMENT OF THE USE OF C-BAND FOR GNSS AO 5410, closing 30/05/2007 GNSS EVOLUTIONS PROGRAMME SYSTEM EXPLORATION STUDIES Information Day 23 rd April 2007 This presentation is for information purposes
More informationS a t e l l i t e T i m e a n d L o c a t i o n. N o v e m b e r John Fischer VP Advanced R&D
STL - S a t e l l i t e T i m e a n d L o c a t i o n N o v e m b e r 2 0 1 7 John Fischer VP Advanced R&D jfischer@orolia.com 11/28/201 1 7 WHY AUGMENT GNSS? Recent UK Study Economic Input to UK of a
More informationSENSORS SESSION. Operational GNSS Integrity. By Arne Rinnan, Nina Gundersen, Marit E. Sigmond, Jan K. Nilsen
Author s Name Name of the Paper Session DYNAMIC POSITIONING CONFERENCE 11-12 October, 2011 SENSORS SESSION By Arne Rinnan, Nina Gundersen, Marit E. Sigmond, Jan K. Nilsen Kongsberg Seatex AS Trondheim,
More informationIEEE Working Group on Mobile Broadband Wireless Access <http://grouper.ieee.org/groups/802/20/>
00-0- Project Title Date Submitted Source(s) Re: Abstract Purpose Notice Release Patent Policy IEEE 0.0 Working Group on Mobile Broadband Wireless Access IEEE C0.0-/0
More informationOn Discriminating CubeSats Launched Together
On Discriminating CubeSats Launched Together Michael Cousins SRI International 2008 CubeSat Developer s Workshop San Luis Obispo, California 1 CubeSat Discrimination Scope: Discuss and explore the problem
More information2009 Small Satellite Conference Logan, Utah
Exploiting Link Dynamics in LEO-to-Ground Communications 2009 Small Satellite Conference Logan, Utah Joseph Palmer jmp@lanl.gov Michael Caffrey mpc@lanl.gov Los Alamos National Laboratory Paper Abstract
More informationProf. Maria Papadopouli
Lecture on Positioning Prof. Maria Papadopouli University of Crete ICS-FORTH http://www.ics.forth.gr/mobile 1 Roadmap Location Sensing Overview Location sensing techniques Location sensing properties Survey
More informationGlobal Navigation Satellite Systems II
Global Navigation Satellite Systems II AERO4701 Space Engineering 3 Week 4 Last Week Examined the problem of satellite coverage and constellation design Looked at the GPS satellite constellation Overview
More informationITU Radiocommunication Sector (ITU-R) and Climate Change. Alexandre VASSILIEV ITU Radiocommunication Bureau
ITU Radiocommunication Sector (ITU-R) and Climate Change Alexandre VASSILIEV ITU Radiocommunication Bureau WSIS FORUM 2009, Geneva, 18-22 May 2009 Radio and Information Society Today radio technologies
More informationDICE Telemetry Overview and Current Status
DICE Telemetry Overview and Current Status CubeSat Workshop, April 2012 Jacob Gunther Overview DICE telemetry overview Operations experience and timeline Narrowband interference mitigation Frequency domain
More informationLE/ESSE Payload Design
LE/ESSE4360 - Payload Design 4.3 Communications Satellite Payload - Hardware Elements Earth, Moon, Mars, and Beyond Dr. Jinjun Shan, Professor of Space Engineering Department of Earth and Space Science
More informationSAR Interferometry Capabilities of Canada's planned SAR Satellite Constellation
SAR Interferometry Capabilities of Canada's planned SAR Satellite Constellation Dirk Geudtner, Guy Séguin,, Ralph Girard Canadian Space Agency RADARSAT Follow-on Program CSA is in the middle of a Phase
More informationRECOMMENDATION ITU-R S.1512
Rec. ITU-R S.151 1 RECOMMENDATION ITU-R S.151 Measurement procedure for determining non-geostationary satellite orbit satellite equivalent isotropically radiated power and antenna discrimination The ITU
More informationACAS Xu UAS Detect and Avoid Solution
ACAS Xu UAS Detect and Avoid Solution Wes Olson 8 December, 2016 Sponsor: Neal Suchy, TCAS Program Manager, AJM-233 DISTRIBUTION STATEMENT A. Approved for public release: distribution unlimited. Legal
More informationAnnex B: HEO Satellite Mission
Annex B: HEO Satellite Mission Table of Content TABLE OF CONTENT...I 1. INTRODUCTION...1 1.1. General... 1 1.2. Response Guidelines... 1 2. BRAODBAND CAPACITY...2 2.1. Mission Overview... 2 2.1.1. HEO
More information