Commissioning of the NigeriaSat-2 High Resolution Imaging Mission

Transcription

1 Changing the economics of space Commissioning of the NigeriaSat-2 High Resolution Imaging Mission Phil Davies (presenting) SSTL Francis Chizea - NASRDA Andrew Cawthorne SSTL Andrew Carrel - SSTL Luis Gomes SSTL Alex da Silva Curiel SSTL Prof Sir Martin Sweeting - SSTL USU Small Satellite Conference, August 2012, Logan, Utah

2 Overview NigeriaSat LEO programme NigeriaSat-2 overview Launch Campaign In orbit results 2

3 NigeriaSat-1 Approximately 100kg 32m resolution 600km x 600km images Imaging in Red, Green and Near Infra-red (NIR) Built in parallel with an engineering model to train Nigerian engineers 3

4 NigeriaSat-1 Results Full imaging of the Niger river 4

5 NigeriaSat-2 mission objectives Mission designed with key Nigerian objectives in mind: To support food supply security, agricultural and geology applications To support mapping and security applications To support development of national GIS infrastructure To provide continuity and compatibility with the existing NigeriaSat-1 system Objectives place key requirements on system: Both medium and high resolution imaging capability Provide timely global imaging access Deliver a high data throughput Support a number of special imaging modes Provide high accuracy geolocation of imagery Be capable of fast slew manoeuvres 5

6 Key mission parameters 2 Day Revisit to Anywhere on Earth 3 Imagers 2.5 metre x 20 kilometre (pan) 5 metre x 20 kilometre (4 bands) 32 metre x 300 kilometre (4 bands) 2 day revisit 5 Operational Modes Scene, Strip, Fast-response, Area, Stereo 7 Year Life High data volume Fast slewing in roll and pitch High accuracy pointing Observation target 30-45deg ~60deg Groundstation Agility 6

7 Spacecraft Configuration APM (1 of 2) Avionics Stack B VHRI MRI Earth Facing Facet Propulsion Tanks X-Band Tx (1 of 2) Battery (Obscured) Avionics Stack A Reaction Wheel SmallSat (1 of 4) Space Facing Facet Avionics Stack C Reaction Wheel MicroSat (1 of 4) Magnetorquer (1 of 3) 7 Commercial in Confidence 7

8 SSTL-300 S1 Launch 2014 The DMC-3 constellation will be the first three spacecraft of the SSTL-300 S1 product This builds on the heritage of the SSTL-300 product (NigeriaSat-2) SSTL metre GSD SSTL-300 S metre GSD 8

9 Changing the economics of space Programme Photos Test campaign Launch campaign In-orbit results

10 Very High Resolution Imager (VHRI) 10

11 Spacecraft Integration NIGERIASAT-2 11

12 One Pixel Micro-vibration Testing Testing of fully assembled spacecraft Isolated from environmental noise Payload used to measure induced mirror motion Illumination centroid monitored while Microwheels and Antenna Pointing Mechanisms are running centroid Linear detector array 12

13 Spacecraft Thermal Vacuum Test 13

14 NigeriaSat-2 14

15 Ground Station Installation in Nigeria 15

16 Getting ready for launch 16

17 Yasny Cosmodrome, Russia June SSTL arrives 17

18 NigeriaSat-2 and NigeriaSat-X 18

19 NigeriaSat-2 Integration with SHM - August 19

20 NigeriaSat-X Integration with SHM 20

21 Dnepr SHM 21

22 Team Photo 22

23 Crocodile 23

24 Off to the Launch Complex 24

25 Launch 17 Aug

26 NigeriaSat-2 Commissioning Largely to plan, apart from schedule adjust to carry out debris avoidance manoeuvre required within days of launch. Commissioning started in Abuja, with support from Guildford Calibration and testing activities have continued from Guildford Two further visits to the Abuja MCC have prepared the Mission Control Centre for nominal operations System testing in December has demonstrated image scheduling, downlink and processing 26

27 Payload support commissioning All payload primary and redundant interfaces tested AOCS calibration Slewing speed and settling times Control accuracy Geolocation <20m CE Microvibration check Compression performance VHRI MRI GPS0 OBC0 HSDR0 HSDR1 GPS1 OBC1 HSDR2 Rx0 XTx0 XTx1 Rx1 27

28 Payload commissioning Real images processed for visual inspection. ~3300 VHRI scenes successfully captured and downloaded ~1500 MRI scenes successfully captured and downloaded Focusing optimised, MTF, SNR, dark noise characterised In-orbit radiometric calibration and satellite cross-calibration All imaging modes tested Strip mode Point and shoot mode Extreme off-pointing Stereo 3x3 and 4x4 Area modes 7 day unattended imaging schedule demonstrated

29 NigeriaSat-2 Capabilities tested Detailed 2.5m resolution images with 20km swath Area mosaics can be captured on a single pass (80km x 80km) 29

30 NigeriaSat-2 Capabilities tested Stereo imaging Wide area imaging at 32m resolution, 300km swath All imaging modes tested successfully in-orbit 30

31 Changing the economics of space NigeriaSat-2 Images

32 Salt Lake City 32

33 Salt Lake City Airport 33

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35 Cape Town 28 Sep 35

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37 Commercialisation Commercial Distribution of Data & Value Added Apps. GeoAppsPlus Ltd The commercial Division of NASRDA Commercial Distribution Partners, Agencies: DMCii Other Private Companies, particularly with focus on Africa Market, with well established market channels, technical infrastructure and capacity for large data processing and distribution 37

38 Conclusion Commissioning of a spacecraft with complex modes and performance completed NigeriaSat-2 is the first instance of the SSTL- 300 platform, and provides cost-effective operational service competing with classical systems costing an order of magnitude greater High duty cycle imaging and mapping Commercial imaging operations have commenced 38

39 Thank You 39