SARAL Project Overview CNES Activities Progress Status

Transcription

1 SARAL Project Overview CNES Activities Progress Status Dr. J. Noubel, P. Sengenes 2nd SARAL-AltiKa Science Workshop Ahmedabad 15-17, March, 2011 ISRO/SAC Ahmedabad - India

2 SARAL Program SARAL Program : joint mission conducted by ISRO and CNES Signature of SARAL and ARGOS-3/SARAL MoU on February 2007 Two missions on-board the SARAL satellite which is based on ISRO SSB (Small Satellite Bus) platform : ALTIKa mission SARAL Satellite with ARgos and ALtika ARGOS-3 mission SARAL Orbit: Polar (incl. = ) and Sun-Synchronous orbit local time at ascending/descending node : 6 am / 6 pm 800 km altitude, low eccentricity same orbit/ground-track as ENVISAT Ground-track repetition period : 35 days Ground-track stability requirement: +/- 1 km SARAL mission lifetime requirement : 5 years of exploitation, to be continued as long as the satellite ang ground components will be operational ARGOS-3/SARAL lifetime requirement: 5 years of operations, objective : 7 years AltiKa/SARAL lifetime requirement: 3 years of operations, objective : 5 years 2 nd SARAL-AltiKa Science Workshop Ahmedabad 15-17, March, 2011 CNES SARAL project overview 2

3 ALTIKA mission Need expressed by scientific oceanography community (IGOS, GODAE, OSTST,.. ) since 2000: «Continuity of high accuracy, high resolution near-real time observations of the ocean surface topography is required. At least, 2 simultaneous altimetry missions are required (including one of the Jason reference class)» That requires to prepare a post-envisat mission that would fly at the same time as JASON2 (launched on June 2008), to fill the gap between JASON1&2/ENVISAT and JASON3/SENTINEL3A (2013) Lisbon Fall 10 OSTST recommendation : to launch SARAL as soon as possible in 2011 ALTIKa mission Approved by CNES Governors Board on December, 2005 Research oriented altimetry mission but with operational products: new instrument, higher frequency (Ka-band), enhanced performances but with a consolidated architecture : conventional nadir altimeter Operational products: Near Real Time (Met. Agencies) and Off-line products (Science) new potential applications on ice, land, coastal areas, rain, clouds AltiKa scientific objectives Ocean meso-scale variability studies with an improvement in vertical and spatial measurement resolution thanks to Ka-band altimeter Data assimilation in a global ocean model contribution to : coastal altimetry, continental waters and inland ice sheet monitoring, light rainfall and clouds climatology, Geodetic reference system determination thanks to Doris and a Laser Retro-reflector Array 2 nd SARAL-AltiKa Science Workshop Ahmedabad 15-17, March, 2011 CNES SARAL project overview 3

4 ARGOS-3 mission ARGOS-3/SARAL mission Opportunity for the ARGOS-3 payload to flight on-board the SARAL satellite has been agreed by ISRO and CNES in 2006 to improve and to expand the capabilities (availability, performance) of the ARGOS Data Collection System in order to minimize the mean time delay and the data latency for a user to access to its ARGOS data product ARGOS-3/SARAL will add to ARGOS-3 constellation formed with ARGOS-3 payloads on board METOP-A (launched in Oct. 2006) and NOAA N (Feb. 2009) ARGOS-3 payloads are also embarked on-board METOP-B (2012) and METOP-C (2016) ARGOS users segment : ~ beacons spread all over the world 2 nd SARAL-AltiKa Science Workshop Ahmedabad 15-17, March, 2011 CNES SARAL project overview 4

5 SARAL system overview SARAL Satellite Integrated Payload Module CNES Payload Payload Interface Module ICU SSB SARAL Space Segment SARAL S-Band Ground Stations Network Flight Operation Control Center Laser Community SARAL Payload Data Segment AltiKa & ARGOS3 Missions Centers EUMETSAT Center AltiKa NRT ISRO Centers AltiKa NRT AltiKa OFL Auxiliary data providers CNES AltiKa Mission Center ARGOS Global Global Processing Centers DORIS Beacons Network Outside INDIA AltiKa Users IDS ARGOS ARGOS Users User Within INDIA AltiKa Users SARAL X-band TM PSLV Launch vehicle SARAL X-Band Ground Stations Network ARGOS Master Beacons 2 nd SARAL-AltiKa Science Workshop Ahmedabad 15-17, March, 2011 CNES SARAL project overview 5

6 AltiKa & Argos-3 payloads accommodation on SSB/IMS-2 platform : SARAL satellite INTEGRATED PAYLOAD MODULE STAR SENSORS SSB/IMS-2 PLATFORM ARGOS L-BAND ANTENNA ARGOS UHF ANTENNA ALTIKA ALTIMETER & RADIOMETER ANTENNA SARAL sat. characteristics DORIS ANTENNA TTC S-BAND ANTENNA X-BAND ANTENNA MAGNETOMETER # Mass : < 400 kg - SSB platform : ~215kg - Payload Module : ~163 kg - Argos UHF antenna: ~5 kg #Power : 850W / 720W ( BOL / EOL) - SSB platform: ~ 200W - Payload Module: typical consumption <250 W (max consumption < 350 W) # Size - ~ 1m x ~1m x 2.7 m - Solar panels : 2 wings of 1.2m x 1.62m 2 nd SARAL-AltiKa Science Workshop Ahmedabad 15-17, March, 2011 CNES SARAL project overview 6 LRA

7 Payload Integrated Module Progress Status PIM Definition and Design Reviews CNES/ISRO PIM PDR held in Toulouse on December 2008 after CNES/THALES (PIM Industrial Prime) PIM PDR held in October 2008, and followed by CNES/THALES PIM CDR held in June/July 2009 Flight models of AltiKa, Doris and ARGOS-3 payloads have been delivered to THALES PIM AIT team on August/September 2009 Qualification of AltiKa instrument FM has been formally pronounced by CNES Steering Board in Dec ICU equipments (PIM electrical Interface Control Units) delivered to PIM AIT team on November 2009 (AAIU) and on December 2009 (PDU) LRA FM delivered to CNES on Dec. 09, then to THALES AIT on Feb. 10 Integration of all electrical equipments completed by end of December 2009 Jan. / Feb 2010 : completion of PIM initial electrical reference tests: integrated payloads functional and performances validation tests 1st half of March 2010 : completion of EMC/EMI CE/CS tests at PIM level 2nd half of March 2010 : integration of AltiKa antenna sub-assembly, integration of Doris & ARGOS-3 L-band antennas and of LRA April 2010 : MLI and ESD/RF shields installation - Altika antenna alignment 1st half of May 2010: Shipment of PIM and associated test means to THALES/Cannes facilities to perform the environmental qualification tests. 2 nd SARAL-AltiKa Science Workshop Ahmedabad 15-17, March, 2011 CNES SARAL project overview 7

8 Mechanical Qualification tests (sine vibrations, acoustics, shocks) successfully passed in the 1st half of June nd SARAL-AltiKa Science Workshop Ahmedabad 15-17, March, 2011 CNES SARAL project overview 8

9 In August 2010, EMC/EMI RE/RS tests including PIM RF self-compatibility test: OK 2 nd SARAL-AltiKa Science Workshop Ahmedabad 15-17, March, 2011 CNES SARAL project overview 9

10 1st half of September 2010, Thermal Vacuum test including PIM Thermal Balance: OK 2 nd SARAL-AltiKa Science Workshop Ahmedabad 15-17, March, 2011 CNES SARAL project overview 10

11 PIM Final Electrical Reference tests sequence final functional and performances validation tests In October 2010, a formal «electronic part alert» was raised by THALES because of some failures observed on some other programs Failures were due to an excess of coating on some particular parts (KSO components) during PCB manufacturing process No anomaly was observed on SARAL equipments Nevertheless, as a precautionary measure, we decided to retrofit three PIM equipments (AAIU, PDU and AltiKa ARFU) which could be affected. These 3 equipments have been retrofitted and post-retrofit qualification tests have been performed by the end of PDU and AltiKa ARFU have been re-integrated inside PIM in January 2011 AAIU has been re-integrated in February PIM final functional and performances reference tests are currently being done in THALES/Toulouse facilities CNES/THALES Qualification Review is planned to be held on April/May 11. PIM ready to be shipped to India: end of 2 nd Quarter of nd SARAL-AltiKa Science Workshop Ahmedabad 15-17, March, 2011 CNES SARAL project overview 11

12 SARAL Ground Segment i i Shadnagar XBAND Shadnagar Bangalore ISRO SBAND ET LEOP ISRO SBAND ETs Kiruna XBAND Kiruna KRX Inuvik XBAND Inuvik IVK 1b 5b 5c NMC Kiruna Bangalore POLARXET Access Point tests with ISRO/NRSC and ISRO/SAC ISTRAC SCC 10 i Interface tests covered by GSOV document 1 Toulouse CNES NOC Darmstadt EUM Data server Toulouse CNES SARAL Mission Centre 7 TM-NRT UMARF EUMET Cast/GTS Aux. data providers CNES Users Users ISRO Users 2 nd SARAL-AltiKa Science Workshop Ahmedabad 15-17, March, 2011 CNES SARAL project overview ILRS 3 Shadnagar NRSC FTP access point 8 9 SD 6 Washington ARGOS Processing ARGOS Centers Processing Center Toulouse Darmstadt Shadnagar Laser DB SSALTO NRSC TM-NRT Ahmedabad SPA Ahmedabad MOSDAC ARGOS Users

13 SARAL System & Ground Segment (1/2) October 2009 : CNES/ISRO/EUMETSAT SARAL System Interfaces, Performances and Validation Review SALP/SSALTO (CNES altimetry multi-missions Center) March 2010 : SSALTO/AltiKa upgrade V2 Integration/Validation achieved for system tests Payload Command & Control Orbitography : MOE / POE processing Altimetry/radiometry : OGDR / IGDR / GDR processing April 2010 : installation of TM_NRT software in EUMETSAT facility June 2010 : installation of TM_NRT system in ISRO/NRSC Shadnagar facility installation of OFL system in ISRO/SAC Ahmedabad facility November 2010 : End of SSALTO/AltiKa upgrade V2 Acceptance Scientific validation completed identification of processing algorithms tuning Ground files and parameters processing review May 2011 : End of SSALTO/AltiKa upgrade V3 Acceptance Trend analysis functions (IMIS) Algorithm/parametrization tuning (Files review output) final versions of SPA and TM-NRT ready for installation in EUMETSAT and ISRO/SAC and ISRO/NRSC facilities for the Long Term Routine tests and System Operational Qualification 2 nd SARAL-AltiKa Science Workshop Ahmedabad 15-17, March, 2011 CNES SARAL project overview 13

14 SARAL System & Ground Segment (2/2) X-band Polar Ground Stations : Kiruna (Sweden) & Inuvik (Canada) Sept 15, 2010 : establishment of the data link (2 Mb/sec) between Esrange Space Center and EUMETSAT/Darmstadt Center Sept : IT-1 global test Dec 2010 : IVK Partnership Polar Station Technical Qualification & establishment of the data link (2 Mb/sec) between Inuvik and Esrange Space Center From Jan 2011 : KRX Partnership Polar Station Technical Qualification in progress EUMPC Dec 2010 : System Integration and Verification completion Dec 2010 : DCN between EUMETSAT and NRSC Shadnagar : link exists, via Svalbard, using the high data rate link set up between EUMETSAT and ISRO according to both agencies agreement (Oceansat2, ) Satellite Control Center (SCC) and S-band stations ISRO presentation 2 nd SARAL-AltiKa Science Workshop Ahmedabad 15-17, March, 2011 CNES SARAL project overview 14

15 System and Ground Segment forthcoming activities DCN between CNES/SSALTO in Toulouse and SARAL SCC in ISTRAC/ISRO in Bangalore Still to be discussed between CNES and ISRO (CNES proposes to use Internet with secured protocol) Completion of Ground Segment Overall Validation (GSOV) & Mission System tests GSOV Integration tests : interfaces compatibility tests between all GS elements achieved for all Payload Data segment IFs; pending the Satellite Control Center availability GSOV Technical Validation tests : Realistic scenarios and maximising the use of operational interfaces, hardware and software GSOV-VT : SARAL GS VALIDATION TESTS MIS-VT : MISSION SYSTEM VERIFICATION TEST (with payloads-s/c-scc-ssalto) System Operational Qualification tests LTR : LONG TERM ROUTINE TESTS DR : Launch DRESS REHEARSALS (ISRO definition) Will be concluded by the SARAL System Operational Readiness Review (ORR) 2 nd SARAL-AltiKa Science Workshop Ahmedabad 15-17, March, 2011 CNES SARAL project overview 15

16 Archive Dissemination Users services in operational phase ISRO : NRT and OFL products archive and dissemination to users within India (except for DORIS products), and corresponding Users services EUMETSAT : NRT processing, archive and dissemination to users outside India, and corresponding Users services User Service Helpdesk: Web : ops@eumetsat.int CNES : OFL processing, archive and dissemination to users outside India, and corresponding Users services User Service Helpdesk: AVISO Altimetry Web : aviso@oceanobs.com Science Data policy : all OSS data products will be made available to WMO users on a free basis and without any restriction either geographical or temporal Archive for at least 10 years after the end of the SARAL operations 2 nd SARAL-AltiKa Science Workshop Ahmedabad 15-17, March, 2011 CNES SARAL project overview 16

17 2 nd SARAL-AltiKa Science Workshop Ahmedabad 15-17, March, 2011 CNES SARAL project overview 17

18 LEOP SODAP Assessment Phase ALK Verification Phase NRT Verif. Phase OFL Verif. Phase NRT Op. Phase OFL Op. Phase Operational Phase SARAL Ops. Phase SARAL Mission Phases and associated responsabilities 1 day satellite on injection orbit 1 week ARGOS Verification Phase Nominal satellite and instruments modes 2 months cycle 1 In-Flight Assessment Review 9 to 10 months 5 months First Verification Workshop 3 months Start of nominal operations Resp : CNES for System coordination Resp : ISRO with CNES support Resp : CNES/ISRO Resp : CNES/ISRO/EUMETSAT with PIs support Near RT products delivery by ISRO and EUM ARGOS-3 Commissioning Review Resp : ISRO Platform/CNES Payload Final Verification Workshop OFL delivery & reprocessing Resp : CNES with CLS support Resp : EUMETSAT & ISRO (generation and distribution) Resp : CNES & ISRO (generation and distribution) Resp :ISRO/CNES Sat Operations CNES ALK Operations Resp :CNES/CLS ARGOS-3 Operations 2 nd SARAL-AltiKa Science Workshop Ahmedabad 15-17, March, 2011 CNES SARAL project overview 18