Minutes SOHO Weekly Planning Meeting February 2, 1996 Chair: Piet Martens, ESA SOC Minutes: Bernhard Fleck, ESA DPS Handout distributed (more copies can be obtained upon request) AGENDA 1. Update on long term schedule (Feb 14 and beyond) 2. Next week's schedule: - DSN contacts - SVM reserved times - Identify needs for dedicated command link - Script for absolute pointing and jitter tests - Script for thermo-elasticity test - High rate mode changes related to station handover 3. A.O.B. 1. Update on long term schedule (Feb 14 and beyond) --------------------------------------------------- SOHO COMMISSIONING SCHEDULE - LONG TERM Piet Martens 1 February 1996 Feb 8 - Feb 26: Halo Orbit Insertion, Halo Orbit Commissioning S/C and Experiment Pointing Tests TEST - DESCRIPTION - DURATION - TIMELINE S6/J5 - Absolute Pointing Calibration 0.5 day - 8 Feb (12h pass for S9/J4 - Pointing Stability 0.5 day - 8 Feb both on one day) (includes S8) SSP2 - PTCS Calibration for Pointing 4.5 days - 9-13 Feb - Experiments to Safe 2h - 13 Feb HOI - Halo Orbit Insertion Maneuver 1 day - 14 Feb + 4th Reaction Wheel (17h hot backup) - Contingency 1 day - 15 Feb NEAR - NEAR Launch (reduced DSN) 1 day - 16 Feb - Experiments reopen doors 5h - 17 Feb Cal. - Experiment Cal. on 38 Aqr. 1 day - 18 Feb SSA6 - GOLF SSPS Off-set Calibration 3 days - 22-24 Feb (continue during non-contact) (20-22 if door reopended on Feb. 15) ___________________________________ March timeframe (depending upon DSN availability) AOCS - S/W Patches and Tests 1 week J1 - Calibration Rolls 1 day (momentum management) Trim - Orbit Trim Burn Joint with J1 SSA6 - MDI, VIRGO SSPS Off-set Cal. 2 days (extended contacts) - HOI Commissioning (tests TBC) 5 days MDI - 80h continuous test 3.5 days (continuous downlink) GOLF - Switch to Channel B 4h SSA6 - GOLF SSPS Off-set Calibration 3 days (TBD time after switch) (continue during non-contact) EIT - Off-set Pointing Request EIT 1 day (possibly combined/coordinated with VIRGO off-pointing test) - Exact timing input needed for DSN scheduling from P.Lemaire and J.Raymond for SUMER/UVCS calibrations on 38 Aqr. on 18 Feb. - new EIT/MDI request for off-set pointing test of about 12 arcmin 2. Next week's schedule: ------------------------ - DSN contacts: DATE DOY BOT EOT Duration ---------------------------------------- 2/5/96 36 00:40 07:03 6:23 2/5/96 36 08:00 00:05 16:05 2/6/96 37 02:40 05:40 3:00 2/6/96 37 06:30 07:50 1:20 2/6/96 37 13:48 22:30 8:42 2/7/96 38 05:40 07:02 1:22 2/7/96 38 06:30 14:42 8:12 2/7/96 38 13:50 22:35 8:45 2/8/96 39 02:40 07:02 4:22 2/8/96 39 08:05 16:19 8:14 2/8/96 39 18:15 07:02 12:47 2/9/96 40 06:35 10:35 4:00 2/9/96 40 13:48 07:01 17:13 2/10/96 41 06:45 06:31 23:14 2/11/96 42 06:27 07:01 24:34 (input to new SOHO schedule) DRAFT SCRIPT FOR POINTING AND JITTER TESTS __________________________________________ Piet Martens, ESA SOC Last Update: 2 February 1996 TESTS: 1. Absolute Pointing Verification (MATRA: S6, Exps: J5) 2. Short Term Pointing Stability Test (MATRA: S8 & S9, Exps: J4) SCHEDULED DATE: 8 February 1996, during long DSN contact DOCUMENTATION: 1. MATRA Procedure ABS_POINT_VERIF, issue 3, 18_APR-95 2. MATRA Procedure POINT-STAB_DUR_EXP_MOT, issue 3.2, 06_APR_95 3. Experiments Joint Test J4, on WWW SOHO pages, commissioning/joint 4. Experiments Joint Test J5, on WWW SOHO pages, commissioning/joint 5. Minutes ESA/NASA/FOT/MATRA/Experiments meeting on joint tests, 13-DEC-95, sent by e-mail 6. Minutes SOHO weekly planning meeting, 26-JAN-96, sent by e-mail 7. SOHO alignment cube, angle definition, handout by Christian Lebranchu Copies of all these documents can be obtained from Piet Martens PARTICIPANTS: - FOT, MATRA, ESA, NASA - Adjustable pointing: MDI, SUMER, LASCO, UVCS CDS if sufficiently prepared - Fixed pointing: GOLF, VIRGO, EIT - Only for jitter generation: SWAN NOT PARTICIPATING: CELIAS, COSTEP, ERNE DRAFT SCRIPT AND TIMELINE: DAY TIME OPERATION COMMENT -- Absolute Pointing Verification: S6/J5 -- Prior to Feb 7 Exps. determine off-set If feasible, and ex- angles between in-orbit and pressed in predefined pre-launch optimal pointing angles (see ref. 7) Feb 7 End of pass Exps. to optimal in-orbit Most are there already minus tbd pointing (if adjustable) Feb 7/8 Non-contact Exps. refrain from activities No changes in thermal Period causing thermal disturbance settings, mech. motions Feb 8 First 2h of Monitor thermal stability No changes in thermal contact (continue if OK) settings, mech. motions Feb 8 contact+2h Exps. take simultaneous Only motions allowed images at regular intervals are those required to take images (shutters and filter wheels) NOTE: Need to arrange for simultaneous ground-based magnetogram to calibrate absolute roll (in addition to LASCO C3 star position measurements). -- Short Term Pointing Stability Test S8/J4 -- NOTE: Roll Steering Law Inhibited HGA-APM commands avoided in this period No tape-recorder movements Feb 8 contact+3h MDI starts ISS jitter Other exps. remain in program. LASCO prepares same obs. mode Fabry-Perot. SUMER rear slit camera Feb 8 contact+3.5h MDI+LASCO+SUMER observe No changes in wheel jitter from reaction wheels speed required -- Short Term Pointing Stability Test S9/J4 -- Feb 8 contact+4h Start of sequence of exp. MDI+LASCO observe, mechanism motions: motion, others refrain from wait 2m, next motion, etc. motions and thermal changes, except as scripted (check image frequency) Feb 8 SEQUENCE: contact+4h 1. MDI shutter, 2. MDI Michelson tuning motors, 3. MDI cal-focus wheels 4. CDS legs 5. CDS slit 6. CDS folding mirror 7. SUMER scan mirror + grating focus 8. SUMER telescope mirror 9. SUMER slits 10. EIT sector wheel 11. EIT shutter 12. EIT filter wheel 13. UVCS roll mechanism (high speed) 14. UVCS roll mechanism (medium speed) 15. UVCS roll mechanism (low speed) 16. UVCS pointing mechanism, stage X 17. UVCS pointing mechanism, stage Y 18. UVCS telescope mirrors mechanism 19. UVCS internal occulter 20. UVCS OVI grating 21. UVCS Ly-A grating 22. UVCS polarizer mechanism 23. UVCS VL filter 24. UVCS OVI filter 25. UVCS Ly-A filter 26. UVCS OVI Slit Mechanism 27. UVCS Ly-A Slit Mechanism 28. LASCO shutter C1 29. LASCO shutter C2 30. LASCO shutter C3 31. LASCO filter wheel C1 32. LASCO filter wheel C2 33. LASCO filter wheel C3 34. LASCO polarizer C1 35. LASCO polarizer C2 36. LASCO polarizer C3 37. SWAN +Z lower periscope mechanism (full speed) 38. SWAN +Z upper periscope mechanism (full speed) 39. SWAN -Z lower periscope mechanism (full speed) ~contact+6.5h 40. SWAN -Z upper periscope mechanism (full speed) - List to be verified by all experimenters and updated if needed. - List to be prioritized (after the meeting ESA/MATRA changed the order of experiments to UVCS, SUMER, CDS, rest tbd) - Fabry-Perot has cycle of 2m observing, 30s down-load. Observations need to be synchronized with that - LASCO Fabry-Perot cannot observe during LASCO/EIT motions - MDI needs to reconfigure for about 5m for transition from images to ISS mode. Feb 8 ~ contact+7h Experiments repeat absolute To be checked for pointing observations drift Feb 8 End-of-contact Start off-line analysis Exps. will provide (several days) data in requested format - Script for thermo-elasticity test: to be provided later in the week - High rate mode changes related to station handover: to be clarified by Piet Martens - No needs for large chunks of dedicated commanding, except for 3h of VIRGO requested for February 7. A.O.B. ------ Next meeting: Friday, February 16, 14:00 EDT at EOF (Feb 9: SPWG meeting and extended Daily Status meeting for schedule updates)