1.
The joint TerraSAR-X/TanDEM-X Mission Planning System F. Mrowka, M. P. Geyer, C. Lenzen, A. Spörl, T. Göttfert, E. Maurer, M. Wickler, B. Schättler I GARSS 2011, Vancouver, 29-July-2011

2.
Overview <ul><li>The TanDEM-X Mission Planning Challenges </li></ul><ul><ul><li>Two Satellites and Two Missions </li></ul></ul><ul><ul><li>Mutual Illumination Risks </li></ul></ul><ul><ul><li>Sync-Warning Handling </li></ul></ul><ul><li>From the TerraSAR-X (TSX-1 Satellite only: MPS-tsx ) to the TanDEM-X (both satellites/both Missions: MPS-tsm-tdm ) Mission Planning System </li></ul><ul><ul><li>Before Launch </li></ul></ul><ul><ul><li>Commissioning Phase </li></ul></ul><ul><ul><li>Operational Phase </li></ul></ul><ul><li>Outlook </li></ul>

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Challenges: Two Satellites – Two Missions

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Challenges: Two Satellites – Two Missions <ul><li>MPS-tsx </li></ul>TSX-1 CmdGen Constraint- Check, etc Order- Ingestion TSM- R2CC Order- Ingestion TSM- Order- Ingestion MPS DB

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Challenges: Two Satellites – Two Missions <ul><li>MPS-tsm-tdm </li></ul>TSX-1 CmdGen TSM- R2CC TDX-1 CmdGen TSM- Order- Ingestion MPS DB Constraint- Check, etc

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Challenges: Two Satellites – Two Missions

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Challenges: Two Satellites – Two Missions <ul><li>MPS-tsm-tdm </li></ul>TSX-1 CmdGen TSM- R2CC TDX-1 CmdGen TSM- Order- Ingestion TDM- Order- Ingestion TDM- R2CC TAP MPS DB

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Challenges: Mutual Illumination Risks <ul><li>Input provided every 12h by the FDS </li></ul><ul><li>For nominal TerraSAR-X-Acquisitions: </li></ul><ul><ul><li>TSX-1 or TDX-1 is selected at first in respect to the exclusion zones </li></ul></ul><ul><li>For nominal TanDEM-X Acquisitions: </li></ul><ul><ul><li>Selection of the active Satellite at first in respect to the exclusion zones </li></ul></ul>0° 30° 50° 65° “ TDX may not transmit in desc. orbit” exclusion zones (example) TSX-1 TDX-1 “ TSX may not transmit in asc. orbit” TSX-1 TDX-1

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Challenges: Sync-Warnings – The course timing Sync-Warning-Opportunity 1 Sync-Warning-Opportunity 2 TSX-DT t SWOC- Result SW max. 53min SW TDX TSX

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Challenges: Sync-Warnings – The precise timing TDM DT t SW SW TDM DT TDX TSX DataTake- StartTime- Correction Disabled Disabled Disabled Disabled TSM DT Enabled

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Challenges: Sync-Warnings - Example

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Challenges <ul><li>Power-Thermal-Model </li></ul><ul><ul><li>MPS-tsx : Orbit-Usage-Model for one Orbit only </li></ul></ul><ul><ul><li>MPS-tsm-tdm (To fulfill the demanding TanDEM-X needs): </li></ul></ul><ul><ul><ul><li>Thermal-Model: more then 30 independent accumulating time-frames for modeling data acquisition and data downlink </li></ul></ul></ul><ul><ul><ul><li>Power-Model: elaborated Power-Usage-Model was implemented to predict the on-board battery-charge-level (consumer: Instrument incl. several Warm-Up-Levels, X-Band-Downlink-Transition, etc. and supply: taking into account eclipse times, satellite-attitude. etc.) </li></ul></ul></ul><ul><li>Enhanced priority concept implements a flexibility for GlobalDEM-acquisitions </li></ul><ul><li>Down-Link-Delay for TDX-1 and Downlink from both satellites to one station contact </li></ul><ul><li>=> MPS-tsm-tdm has the same availability and performance requirements as the MPS-tsx </li></ul>

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MPS-tsx to MPS-tsm-tdm : Before TDX-1Launch <ul><li>MPS-tsm-tdm </li></ul>TSX-1 CmdGen Constraint- Check, etc Order- Ingestion TSM- R2CC Order- Ingestion TSM- Order- Ingestion MPS-tsx MPS DB TSX-1 CmdGen TSM- R2CC TDX-1 CmdGen TSM- Order- Ingestion TDM- Order- Ingestion TDM- R2CC TAP MPS DB Space-Craft- Simulator On-ground After TDX-1 Launch ? TSX-1 TDX-1

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MPS-tsx to MPS-tsm-tdm: Commisioning Phase June‘10 July‘10 Aug‘10 Sep‘10 Oct‘10 Nov‘10 Dec‘10 Early Orbit Phase Grg Segment Checkout Bi-static Commissioning Phase 20 km Formation TDX Orbit Drift 16.000 km  20 km Close Helix-Formation 300-400 m Launch 21 June First SAR Image 24 June (MET +3.6) First DEM 16 July (MET +25) TDX Monostatic Comm. Phase 6 Months Commissioning Phase First close formation DEM 19 October (MET +124) First bi-static SAR image 8 August (MET +48) 20 km Formation TDX Orbit Drift 16.000 km  20 km

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MPS-tsx to MPS-tsm-tdm : Commissioning Phase <ul><li>Mono-Static-Commissioning-Phase </li></ul><ul><li>MPS-tsx : </li></ul><ul><ul><li>Minor modification to identify TanDEM-X acquisition requests </li></ul></ul><ul><li>Ground-Segment ready to support two mission planning systems </li></ul><ul><ul><li>Routing of nominal TerraSAR-X Orders to MPS-tsx and specifically ordered ones for TDX-1 to MPS-tsm-tdm </li></ul></ul><ul><ul><li>TSX-1 part of TanDEM-X orders need to be ordered as System-Orders via MPS-tsx </li></ul></ul><ul><li>MPS-tsm-tdm : </li></ul><ul><ul><li>TSX-1 commands verified on space-craft-simulator (occasionally) </li></ul></ul>

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MPS-tsx to MPS-tsm-tdm: Commisioning Phase June‘10 July‘10 Aug‘10 Sep‘10 Oct‘10 Nov‘10 Dec‘10 Early Orbit Phase Grg Segment Checkout Bi-static Commissioning Phase 20 km Formation TDX Orbit Drift 16.000 km  20 km Close Helix-Formation 300-400 m Launch 21 June First SAR Image 24 June (MET +3.6) First DEM 16 July (MET +25) TDX Monostatic Comm. Phase 6 Months Commissioning Phase First close formation DEM 19 October (MET +124) First bi-static SAR image 8 August (MET +48)

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MPS-tsx to MPS-tsm-tdm : Commissioning Phase <ul><li>Close-Formation without full-operational MPS-tsm-tdm not possible: </li></ul><ul><li>Sync-Warnings </li></ul><ul><li>Exclusion-Zones </li></ul><ul><li>Operationalisation of MPS-tsm-tdm: </li></ul><ul><li>Switch of MPS-tsx </li></ul><ul><li>Routing of all TerraSAR-X orders to MPS-tsm-tdm </li></ul><ul><li>TSX-1 commands out of MPS-tsm-tdm sent to the TSX-1 satellite </li></ul>

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MPS-tsm-tdm: Operationalization / Close Formation Change 07.10.2010 Forma-tion change 2 3 4 5 6 7 8 9 10 11 1 2 3 4 MPS-tsm-tdm Operation-alisation 5 6 7 8 9 10 11 18.10.2010 W W W W <ul><ul><li>FFR </li></ul></ul>W W Kiruna Sync Warn, ISL 05.10.2010 Cycle 8 Cycle 6 TSX: extend. timeline First timelines with updated Ground Segment Cycle 7 1 2 3 4 5 6 7 8 9 10 11 29.10.2010 W W NSG Inuvik Statisitical DTs TSXX DAS TSXX DAS Statistical DTs TSXX DAS <ul><ul><li>TSM Release on 2 Satellites </li></ul></ul>TSX ASM Test Bi- CP TDX: operational DTs W TSX Excl. Zone Test 04.10.2010 26.09.2010 First bi-static image

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MPS-tsm-tdm: Bistatic Commisioning Phase June‘10 July‘10 Aug‘10 Sep‘10 Oct‘10 Nov‘10 Dec‘10 Early Orbit Phase Grg Segment Checkout Bi-static Commissioning Phase 20 km Formation TDX Orbit Drift 16.000 km  20 km Close Helix-Formation 300-400 m Launch 21 June First SAR Image 24 June (MET +3.6) First DEM 16 July (MET +25) TDX Monostatic Comm. Phase 6 Months Commissioning Phase First close formation DEM 19 October (MET +124) First bi-static SAR image 8 August (MET +48)

20.
MPS-tsm-tdm: Full automatic operations <ul><li>Since 2010-12-14 MPS-tsm-tdm is running full-automatic and is showing </li></ul><ul><ul><li>Same or better performance and </li></ul></ul><ul><ul><li>A similar reliability as MPS-tsx! </li></ul></ul><ul><li>Some Numbers </li></ul>Often more then 100 000 Usually less then 10 000 Internal Profile-Pieces Around 200 Around 100 Constraints Often more then 3000 Usually less then 1000 Commands per day Often more then 4000 Usually less then 500 Datatakes (candidates) per day MPS-tsm-tdm MPS-tsx Number of ..

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MPS-tsm-tdm: Operations <ul><li>A 24h snap-shot of a command timeline. In this time frame were commanded: </li></ul><ul><li>52 replays (27 TSX-1 and 25 TDX-1) in 33 different downlink contacts to 8 different ground stations </li></ul><ul><li>98 acquisitions (47 on TSX-1 and 51 on TDX-1) comprising 26 TanDEM-X pairs </li></ul><ul><li>31 Sync-Warnings </li></ul>

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TanDEM-X Ground Station Network Inuvik O‘Higgins Kiruna Chetumal DLR Neustrelitz for TerraSAR-X

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MPS-tsm-tdm: Operations

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Outlook <ul><ul><li>Currently fixed Planning- and Command-Generation nominal time between last order reception and first possible downlink between 6 and 18 hours (except special short notice planning 1h))  event driven planning (just with order reception) and command generation, if confirmed uplink is demanded </li></ul></ul><ul><ul><li>Specific for optical sensors </li></ul></ul><ul><ul><ul><li>Cloud-Forecast-Handling </li></ul></ul></ul><ul><ul><li>Support of constellations </li></ul></ul><ul><ul><li>Generic Mission-Planning-System </li></ul></ul>

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Outlook <ul><li>Future Missions </li></ul><ul><ul><li>FireBIRD (2013) </li></ul></ul><ul><ul><ul><li>IR-Sensor </li></ul></ul></ul><ul><ul><ul><li>Two Satellites in Constellation </li></ul></ul></ul><ul><ul><li>EnMAP (2015) </li></ul></ul><ul><ul><ul><li>Hyper-Spectral-Imager </li></ul></ul></ul><ul><ul><ul><li>New Feature: Cloud-Handling </li></ul></ul></ul><ul><ul><li>TerraSAR-X 2 (2015) </li></ul></ul><ul><ul><ul><li>Probably with TSX-1 and TDX-1 in Constellation </li></ul></ul></ul><ul><ul><ul><li>Event-Driven-Planning – Short-Notice-Command-Generation </li></ul></ul></ul><ul><ul><li>TanDEM-L (net 2019) </li></ul></ul><ul><ul><ul><li>On-Board-Planning? </li></ul></ul></ul>

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Mt. St. Helens, USA 2010-08-13T01:54:09

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Power Modeling I Energy conflict Lost Values (unused energy) Fill Level (state of charge) Upper Limit (battery capacity) Lower Bound Conflict on fill level Solar panels charging the battery Battery full Energy consumption greater than supply Solar panels charging the battery Battery discharging

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Power Modeling II Charge level without warm-up Charge level with warm-up Warm-up of RS1 instrument Consumption profile Charge level

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SSMM-Modelling DL1 TDX-1 DL1 TSX-2 Datatake 1 Datatake 2 Datatake 3 Datatake 4 Datatake 5 Datatake 6 DL1 TSX-1 DL1 TDX-2 DL1 TSX-3 DL1 TDX-3 Groundstation GS Groundstation DL1 TSX-4 DL1 TDX-4 DL1 TDX-1 DL1 TDX-2 DL1 TSX-5 DL1 TDX-5 DL1 TDX-3 DL1 TSX-6 DL1 TDX-6 DL1 TDX-4 DL1 TDX-5 DL1 TDX-6 TDX-1 memory TSX-1 memory