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ENVISAT PDS Status & Plans

ENVISAT PDS Status & Plans. First 6 Months in Orbit & Objectives for the Last Quarter 2002. PDS Overall Status and Plans: Points to be addressed. Operation strategy (the Kiruna scenario) Encountered difficulties and progress Recovery Plan for the last Quarter 2002

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ENVISAT PDS Status & Plans

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  1. ENVISAT PDS Status & Plans First 6 Months in Orbit & Objectives for the Last Quarter 2002

  2. PDS Overall Status and Plans: Points to be addressed • Operation strategy (the Kiruna scenario) • Encountered difficulties and progress • Recovery Plan for the last Quarter 2002 • Stabilisation of the PDS towards a sustained throughput • Evolution of the operation scenario (Kiruna- Svalbard) • Services to be made progressively available in NRT (Kiruna and ESRIN PDHS) and Offline (LRAC and PACs) • Progressive opening of the User services and phase in of the PIs • Objectives for the last quarter 2002: • Fulfilling the validation objectives (PDS serving all Cal/Val PIs in time) • ENVISAT Mission to be operational by end 2002 For a subset of products and services

  3. Kiruna Only Scenario • Kiruna Station Data Reception • Receives the complete global mission data dump • 8 orbits are received nominally ( dump of the previous orbit within the Kiruna visibility) • 4 to 5 orbits out of visibility are recorded and dumped in the first two orbits of the morning, together with the nominal preceding orbit • Receives all recorded ASAR HR and MERIS FR • Receives ASAR HR and MERIS FR in direct visibility • Matera Station Operation • Receives ASAR HR and MERIS FR in direct visibility (2 orbits in the morning, 2 orbits in the evening) • Copies the data on D1 tapes, sent to ESRIN • Processing at ESRIN PDHS-E

  4. 6 5 4 3 2 1 Kiruna Blind Orbits • 5 consecutive blind orbits (marked 1 to 5) recorded on SSR 1 and 2 • Dump of the recorded data over Kiruna on the first two orbits of Kiruna (first orbit marked 6 )

  5. Kiruna Station Data Processing (PDHS-K) • Global Mission processing strategy • Generation of all level 0 (recovery of any missing level 0 offline over night) • Processing of all level 1B and 2 for the nominal 9 to 10 orbits per day • All level 0 copied on NTP tapes for the LRAC • Dissemination of level 0, level 1B and level 2 products to Cal/Val users according to GSOCP • Over the DDS • On FTP server • On media ( CD-rom and exabytes generated at Kiruna), duplication of AATSR and SCIAMACHY media foreseen at UK-PAC and D-PAC

  6. Kiruna Station Data Processing (PDHS-K) cont’d • Regional Mission Strategy • All ASAR HR processed to level 0 and sent, on NTP tapes, to the 3 PACs • All ASAR HR data processed to medium resolution and Browse • On request processing of ASAR full resolution images • MERIS FR processed to level 0 and sent, on NTP tapes, to the 3 PACs (MERIS browse obtained from the RR data processing) • Dissemination to Cal/Val users according to GSOCP: • On DDS • On media (CD-Rom and Exabytes) • Recent decision to provide full resolution ASAR and MERIS images from PDHS-E and PACs (offline processing and dissemination on media)

  7. Mission Planning • Global Mission defined using the RGT ( Reference Ops Mission generation Tool) • Regional Mission • ASAR operation and on request processing defined by the Cal/Val coordinator via a USF script • MERIS operation and on request processing defined by the Cal/Val coordinator via a script • Background mission defined by the Mission Manager and entered via the USF • Additional PR images requested by ESRIN via the USF • All above nominally defined one week ahead of its execution schedule

  8. Problems Encountered • Lack of robustness of the PDS facilities; • Missing/incomplete functionalities (e.g. concatenation of product slices to make complete instrument operation segments, incomplete follow up and reporting of orders, recovery of failed orders, etc…); • Misfit between the installed Kiruna configuration and the Kiruna scenario • Irregular production throughput at PDHS ; To be noted: • The Kiruna scenario is much more demanding for this station than any future nominal scenario • Testing of the operation, pre-launch, was very much constrained by the limited set of satellite simulated data available ( 3 orbits)

  9. Corrective Actions Implemented Significant progress achieved, today: • PDCC ( mission planning): problems circumvented; • Kiruna configuration partially corrected ( hardware upgrade planned 8 to 12 September) • PDHS: scheduling and production throughput under control, still some product losses in between production, archiving and dissemination (under analysis); • Procedures and scripts put in place to recover failures and missing products ( still to be improved) • LRAC and PACs activities initiated • Instrument Processors corrected to reflect current Cal/Val status.

  10. Data Distribution Current Status • Global Mission Data Products • Meteo products on FTP server towards meteo centre started on 15 August for RA-2, MERIS, AATSR and MIPAS (ASAR Wave to be activated this week) • Media copying at PDHS-K of level 1B and 2 products for distribution to Cal/Val PIs • Product dissemination via DDS ( the best of all services so far) and FTP server • Unfortunately, production not yet achieving the 90% availability target • Regional Mission Data Products • Cal/Val PIs served via on line distribution from PDHS-K (DDS) • Media copying of products at PDHS-K for distribution to Cal/Val PIs • ASAR and MERIS FR images to be produced at PACs: test images already produced and copied on media, production of images for Cal/Val PIs to be started next week

  11. Plan for last Quarter 2002 (1) • Upgrading of the PDHS-K hardware (processor nodes) to ensure the required throughput, 8-12 September (while the payload is stopped for the inclination manoeuvre and for loading of the updated PMC software) • Getting the LRAC operational for systematic production of consolidated level 1b (prerequisite for PAC level 2 offline production): • production testing and analysis on going, • objective: operational readiness 15 October • Getting the PACs operational for offline production and delivery of ASAR and MERIS FR images (test in progress, production to start by 15 September for the Cal/Val PIs)

  12. Plan for last Quarter 2002 (2) • Global Mission service • Priority given to Cal/Val PIs for level 1b and level 2 product delivery • Cal/Val PIs to be served with non consolidated products level 1b and 2 (produced at PDHS) as long as consolidation not available operationally • DDS and FTP servers to be used in priority for Cal/Val needs • Use of PACs for archiving of non consolidated level 1b and 2 products and duplication/distribution on media (to reduce the burden on the PDHS) • For Non Cal/Val PIs: • progressive access to calibrated level 1B to be provided, service to be enlarged to level 2 products as they become validated (towards end 2002) • Service to be provided offline from the PACs, starting with non consolidated products ( on request service for images MERIS RR and AATSR, subscription service wherever compatible with the product size)

  13. Plan for last Quarter 2002 (3) • Regional Mission service: ASAR and MERIS FR • Priority to be given to Cal/Val PIs for data acquisition, production and distribution • PDHS-K and E (Kiruna and ESRIN) to ensure the complete level 0 delivery to PACs • Production of all ASAR medium resolution images and browse at PDHS-K and E • Limited NRT processing and delivery of full resolution images from Kiruna • On request production of level 1 b and 2 products at PACs and distribution on media from PACs (some offline processing at ESRIN PDHS if needed); • Progressive phase in of non Cal/Val PIs starting mid September, the objective is to have 250 PIs phased in by end 2002 • Help/Order Desk interfacing with the PIs • Access to the user service inventory and on line browse • Delivery of level 1b image data products offline via the PACs • Extensive background acquisition to build up an archive, accessible to PIs

  14. Plan for last Quarter 2002 (4) • Initiation of the Kiruna-Svalbard Scenario mid October, with the following Global Mission scenario: • The 5 orbit Svalbard received data to be transmitted by DDS to ESRIN for pseudo NRT (delivery within 12 hours from data take ) • The 9 to 10 orbit Kiruna received data to be processed and disseminated to users within 3 hours from data take • Regional Mission (ASAR and MERIS FR) benefit from Kiruna-Svalbard scenario: • Data acquisition anywhere on the globe, using the SSR, with data dump available every orbit. • Concurrent recording of ASAR and MERIS FR to be provided before mid December 2002. This PDS Plan will fulfill the Cal/Val PIs data needs

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