Study of Micro/Nanosatellite Operation Model for Building Operation Network

Transcription

1 4 th Nano-Satellite Symposium Nagoya, Japan Oct, 2012 Study of Micro/Nanosatellite Operation Model for Building Operation Network 4th Nanosatellite Symposium, Nagoya Naomi Kurahara 1*, Seiko Shirasaka 2, and Shinichi Nakasuka 1 1 Department of Aeronautics and Astronautics University of Tokyo, Tokyo, Japan 2 Graduate School of System Design and Management Keio University, Kanagawa, Japan

2 Contents Introduction Commercialization for space Ground System Network Motivation & Objective Ground System Architecture Summary

3 Introduction Commercialization for Space (1/2) Space development at Universities and private business Surrey Satellite Technology Ltd. (UK) Satrec Initiative (Korea) University of Tront UTIAS(Canada) CalPoly (USA) ISIS (Netherlands) Axel Space (Japan) SPACE X DMC ii

4 Introduction Commercialization for Space (2/2) Who is the Customer/User? Someone who wants to develop a satellite Someone who needs satellite data/information Popularization Increase of non-specialist user Needs of satellite operation service Cost vs. Benefit Customer buy a micro/nanosatellite with 0.1~10M$ How much does customer pay for the ground system and operation cost? Customer/User s interest: How much benefit can be created with? (eg.) for Earth Observation Satellite benefit amount of received data on the ground Amount of Data is proportional to number of ground station Difficulty to maintain several ground stations for 1 customer/user

5 Introduction Ground System Network Ground System Network for mutual collaboration

6 Motivation & Objective Ground System Network for mutual collaboration Internationally distributed antenna is preferred Limited budget for a project team or customer/user For commercialization Longer communication time (=increase of amount of downlink data) is needed Satellite data access reliability should be improved (Research Objective) Study an appropriate ground system architecture for building micro/nanosatellite operation and utilization network

7 Contents Introduction Commercialization for space Ground System Network Motivation & Objective Ground System Architecture Summary

8 Ground System Architecture Goal = to build Ground System Network Interface should be defined Ground Stations Ground Station - Satellite Operation Center/Mission Control Center Ground Station - Mission Data Center 3 ways of approach Operational View.. How target system behave System View.functional & physical design Technical View SysML is used

9 (SysML Modeling) Operation Block Breakdown Satellite Life Cycle

10 (SysML Modeling) Operation Block Breakdown

11 (SysML Modeling) Operation Block Breakdown Satellite Operation Item

12 (SysML Modeling) Operation Block Breakdown Satellite Operation Item

13 Basic Procedure for Satellite Operation Satellite Operation Item

14 (SysML Modeling) Operation Block Breakdown

15 Activity Allocation Satellite Operation Center Ground Station Satellite Operational Nodes Mission Data Center Interface should be discussed

16 Operational Interface Ground Station Node Satellite Operation Center Node Demodulate Decode Decompose Data Packet Common Activity Ground Station A/D convert Decode Synchronize (CCSDS) - Sync Marker Error-correct - Pseudo-randomizing - Reed-Solomon - Convolution - etc. Satellite-dependent Activity Satellite Operation Center

17 Summary Micro/nanosatellite project is very active in many countries Ground System Network is needed Basic operation architecture is studied Operation interface between Ground Station and Satellite Operation Center/Mission Control Center is suggested

18 Call for Participation --- Satellite Operation Network Project Background: Satellite Operation Network as an infrastracture for Satellite Utilization Business IT/Web Business Satellite Utilization Business Satellite Operation Network (Satellite)-(Ground Station)-(Operator) Internet based data transfer network for satellite Operation. Mission data, HK telemetry, and command are transferred. ICT Technology Satellite Operation Network It is difficult to own many ground stations for satellite owners/developers because of its cost. Operation network infrastructure and framework is needed to realize satellite utilization business, such as ICT (Internet) generate IT/Web business market. 2. Mission: Active & Usable Network Mission of this network is to develop real-use operation network which is used for on-going satellite project. Network should be actually under operation. This project is not a software-development project. This project aims to make a paradigm shift for micro/nanosatellite system design via offering an infrastructure of satellite communication link. 3. Milestone 2012 Oct. ~ Nov.: Interface coordination with participants 2012 Dec. ~ 2013 Jan.: Network development for first operation phase 2012 Dec. ~ 2013 Aug: Network development for second operation phase 2013 Feb. ~: First operation phase start Operation target>hodoyoshi-1 (Mission telemetry) 2013 Sep. ~: Second operation phase start Operation target>uniform-1(mission telemetry), HODOYOSHI-3,4 (HK & Mission telemetry, Mission Data UL(UHF) ), and more.

19 Thank you for your attention. Naomi Kurahara

20 Node Definition 4th Nanosatellite Symposium, Nagoya Ground System s 3 main object: telecommunication to satellite, satellite operation, and satellite utilization(data process & provide) Ground System Space System Satellite User Site Mission Data Center (+Service Segment) Satellite Operation Center Ground Station Satellite For operation network another function is needed Network Administration

21 Micro/Nanosatellite Example: HODOYOSHI-1 Satellite weight and size Mission Power Sensors Actuators Attitude Control Communication 50kg (max 60kg), 60cm x 60cm x 60cm (envelope) Earth Remote Sensing with 4 bands, GSD 5m 83W(average), GaAs cell, Li-Ion Battery (15.2V, 7.2 Ah) magnetic sensor, gyro, sun sensor, star sensor, GPS magnetic torquer, reaction wheel, thruster (H 2 O 2, TBD) 3 axis, determination: 30 arc-sec, control: 5 arc-minutes UHF (10Kbps), X-band (10-20Mbps) Developer: Axel Space Launch: 2012 Dec(TBD)