1 / 18

ENVISAT Flight Operations Segment Status

ENVISAT Flight Operations Segment Status. Andreas Rudolph Mission Operations Department ESOC / ESA. Presentation Overview. Satellite Operations Status Summary since SODAP Review Service Module and P/L Equipment Bay Operations Status Instrument Operations Status

blade
Télécharger la présentation

ENVISAT Flight Operations Segment Status

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. ENVISAT Flight Operations Segment Status Andreas Rudolph Mission Operations Department ESOC / ESA

  2. Presentation Overview • Satellite Operations Status Summary since SODAP Review • Service Module and P/L Equipment Bay Operations Status • Instrument Operations Status • Flight Operations Segment Status • Control System, Procedures and On-board S/W Maintenance Facilities • Ground Stations • Mission Planning • WWW SPEVAL • Flight Operations Support for Routine Phase

  3. Service Module Operations • The Service Module Data Handling, Communications, Power, Thermal and Attitude Control Subsystems perform very well • 3-axis controlled pointing better than 15 mdeg/axis in stellar mode • Stellar Fine Control Manoeuvres for ground track control every 20 to 35days show an average performance of better than 99% • Approx. 29kg of 314 kg of Hydrazine used • S/W patches applied to SM computer to ensure Cat bed heaters remain ON permanently (to overcome FCV 9 heater mat failure)

  4. Payload Equipment Bay Operations • The PLM Power, Thermal and Data Management systems perform very well • Tuning of thermal control thresholds was performed to minimise heater switching cycles • In May/beg-June three P/L Switch-off events occurred. Patches were developed, validated and uplinked to work-around the problems observed • PMC S/W version 38 p1 provides a proper S/W solution to these problems (and some additional improvements) and is currently being uploaded

  5. P/L Equipment Bay Availability

  6. Instrument Operations • The ENVISAT instrument complement operates well • A number of S/W patches was developed and validated to either fix problems (SEU handling, counter overflows, performance improvements, etc) for ASAR, DORIS/ MWR ICU, RA-2 • New patches are under development for e.g. SCIA (MCMD transfer problem) • New procedures developed and validated to address specific instrument issues (ASAR periodic reset, MIPAS interferometer slide initialisation, CTI handling, SCIA non-nominal decontamination)

  7. Instrument Availability May/June/July/August

  8. Instrument Availability May-August

  9. Flight Dynamics System AOCS Cmd Checker On-board S/W Maintenance System S/C TM/TC Database TM/TC Archiving: SPEVAL & WWW SPEVAL Spacecraft Simulator Telemetry System Telecommand System TC Kiruna TM Raw TM FOS External Interfaces Mission Planning System Svalbard Raw TC External Server LEOP Network GroundStations Flight Operations Control Centre (FOCC) Flight Operations Segment Systems

  10. Control System - FOCC • The FOCC has been very stable over the first 6 months of the mission with an availability of 100% • Improvements and additional features to take into account operational experience have been added • Significant improvements to the Time Correlation Algorithms and QA check for the Time Correlation product have been developed in close collaboration with Project to ensure provision of a stable datation reference for the science data • Improvements to the handling of CTI parameter tables as agreed with Project – CTI status library reflecting on-board image available regularly on External Server

  11. Control System – FOCC & Procedures - FOP • Back-up TM/TC functions in Kiruna have been validated with the satellite in-flight • Remote Access Systems for quasi real-time access to TM / TC History information are located at Astrium-SAS, Astrium-GmbH, Astrium-UK (B) and ESTEC and are checked out regularly • Two new revisions, Is.4.2 & 4.3, of the Flight Operations Plan have been issued since the SODAP review in response to in-flight anomalies or agreed improvements (e.g. CTI handling). The FOP is stable.

  12. On-Board S/W Maintenance Facilities • The On-board S/W Maintenance System (OBSM) and S/W Maintenance Facilities (SMF) have supported many patch & dump operations successfully • A total of 17 patches have been developed and uplinked to SM CCU, PMC and Instrument Processors in response to anomalies or performance problems • All patches were validated on the ESOC simulator and SVF’s (SM, PMC) or the SMF’s (instrument patches)

  13. Mission Planning System • The Mission Planning System performs well overall • A number of important changes and improvements have been introduced since the SODAP review: • Implementation of proper S/W solution for improved operations of the Data Management System as defined together with Project to ensure good X-band spectrum and no data loss in all downlink cases • ASAR periodic reset functionality • Activation/De-activation of ancillary data MCMD distribution for SCIAMACHY • Improved CTI handling as agreed with Project • Several updates to instrument planning (GOMOS, RA-2, etc)

  14. Mission Planning System – cont. • Additional functionality to support the Kiruna /Svalbard scenario (using variable recording rate as for the Kiruna only scenario) is undergoing acceptance test. • New functionality which is under definition by Project at the moment includes SSR1 MERIS FR data recording on SSR1 and use of 3rd X-band channel for ASAR High Rate downlink.

  15. Flight Dynamics • The performance of the Flight Dynamics System has been very good • A total of 18 orbit manoeuvres have been planned and executed since launch (including this week) as follows: • 3 large in-plane Orbit Control Manoeuvres • 3 out-of-plane Orbit Control Manoeuvres • 1 Fine Control and 2*6 Stellar Fine Control Manoeuvres • A problem identified in the manoeuvre prediction time provided on the FOS External Server for one of the SFCM’s has been corrected

  16. WWW SPEVAL • Since the time of the SODAP review when only a Beta release was available two additional deliveries V 2.2.2 and V2.3 were provided in May and July which are available to the ENVISAT community • All planned functionality is now available and the system performs satisfactorily • If additional users still require some dedicated training specific sessions at ESOC can be organised – please apply to: ENVISAT.SW.Support@esa.int

  17. Ground Stations & Communications • For command and control the Kiruna station (approx. 10 passes/day) and the Svalbard station (approx. 4-5 passes/day): • Availability May until August (Ground Station & Comms): • Kiruna: availability > 99.8 % (only 2 passes lost) • Svalbard: average availability of passes during the night 98.4% • Additional support from stations in the ESA/ESOC network (Villafranca, Perth, Kourou) has been and is being provided in support to critical ENVISAT operations (e.g. PMC V38 uplink and P/L switch-on)

  18. Flight Operations Support for Routine Phase • ENVISAT operations will be performed by the Flight Control Team at ESOC responsible for command & control, S/W maintenance and Mission Planning & Scheduling; • Support will be provided by the Post-Launch Support Office in ESTEC for Satellite and Instruments during the routine phase • Astrium-SAS will provide support for Service Module operations and CCU S/W maintenance under a dedicated contract

More Related