Page tree
Skip to end of metadata
Go to start of metadata

You are viewing an old version of this page. View the current version.

Compare with Current View Page History

« Previous Version 11 Next »


D. Williams, F. Auchère, S. Wallace, T. Grundy, R. Perry.

CMS ops

Currently executing on board is STP-187, in the three-month period known as LTP06, the first of the Nominal Mission Phase.

LTP-05, the prior long-term planning period, came to an end on .

Since the last meeting on , payload has continued observing the Sun in a more or less "synoptic" way after the Earth GAM, with an interruption between and for the re-partitioning of the Solid State Mass Memory, as well as for updating the software that controls it.

Anomalies (if any)

None affecting SPICE/CMS.

CMS data and interpretation 

See IAS CMS data tool
Operations times shown for CMS since the last meeting.


  1. Around and after EGAM
    1. STP-179: 2021-11-26T15:20:00Z – 2021-11-27T04:00:00Z (DOY 330–331)
      1. WOL, TCM and MAINT (EGAM itself; Thrusters firing 2021-11-27T04:04:00 – 05:18:00)  – (warning) AI: pointing needs investigation to discount optical / thermal effects, also to look at the heater operations across the platorm around the MAINT window itself.
    2. STP-179: 2021-11-30T02:00:00Z – 13:40:00Z (DOY 334)
      1. WOL (2021-11-30T03:00 – 03:05)
      2. MAG Calibration Rolls (05:15 – 13:31) around S/C X axis (Sunward direction)
    3. STP-179: 2021-11-30T22:30:00Z – 2021-12-01T12:10:00Z (DOY 334 – 335)
      1. WOL (2021-12-01T03:00 – 03:05)
      2. MAG Calibration Rolls (2021-12-01T01:44 – 12:02)
    4. STP-179: 2021-12-01T22:30:00Z – 2021-12-02T12:10:00Z (DOY 335 – 336)
      1. WOL (2021-12-01T23:29 – 23:31)
      2. MAG Calibration Rolls (2021-12-02T01:44 – 12:02) - longer period variation than just from the rolls themselves. Need to pull out the parameters that show roll around X for comparison.
    5. STP-180: 2021-12-02T21:05:00Z - 2021-12-03T12:45:00Z (DOY 336–337)
      1. WOL (2021-12-02T22:05 – 22:09)
      2. TCM at EGAM+1 week (2021-12-03T07:18 – 07:50). Substantial on-time of thrusters, so it's of interest to examine the post-manoeuvre levels on CMS-1 & 2.
        1. Seems like CMS-2 held steady, and that the CMS-1 drift was real because of non-held temperature.
  2. STP-180: 2021-12-03T20:30:00Z – 2021-12-03T23:30:00Z
    1. SA relubrication (04:23 – 04:29)
  3. STP-180: 2021-12-09T21:05:00Z – 2021-12-10T00:05:00Z
    1. WOL (22:04 – 22:09)
  4. STP-181: 2021-12-13T19:30:00Z – 2021-12-14T05:30:00Z
    1. TCM (unused)
  5. STP-182: 2021-12-20T00:05:00Z – 2021-12-20T03:05:00Z
    1. WOL (01:04 – 01:08)


  1. STP-183: 2021-12-27T23:00:00Z – 2021-12-28T02:00:00Z
    1. SA relubrication (00:09 – 00:18)
  2. STP-184: 2022-01-02T19:00:00Z – 2022-01-02T22:00:00Z
    1. No special platform event – is it of interest to make these observations more often? (moved earlier because SPICE wanted to observe at the originally indicated time).
  3. STP-185: 2022-01-09T00:00:00Z – 2022-01-09T03:00:00Z
    1. No special platform event (SSMM software update so not usual operations) No need to make them regularly: but these are an intersteting data set for showing stability of the measurements in the absence of other effects.
  4. STP-186: 2022-01-17T00:05:00Z – 2022-01-17T09:15:00Z
    1. WOL (01:04 – 01:09)
    2. TCM-Type 2 (unused)
  5. STP-187: 2022-01-24T12:00:00Z – 2022-01-24T15:00:00Z
    1. SA Rotation 0º → 30º (13:20 → 13:26)


    •    CMS operations to be performed weekly, capturing interesting events where possible. 
    •    CMS Operator should switch on CMS ≥30 minutes earlier than the time at which the observations would start, particularly if the observations to catch (for example) a WOL would need to start at midnight. CMS operations in SOOP Kitchen are timed such that they start 30 minutes after assumed switch-on. 
    •    Note that From LTP04 onwards (i.e., starting from STP-154), SOC has not been indicating CMS operations in the EFECS with an RSW_EXT_SPICE. They will still be indicated with CMS “observations” in the LTP plan however.

  • For MAINT-ANY windows, since FCT can do ANYTHING in that window, it's good practice to observe right through (and for any adjoining WOLs + TCMs).

Future operations:

Already planned

Upcoming planned CMS Ops:

LTP-06 runs until the beginning of April (beyond the Remote Sensing Windows)

  • WOL: 2022-01-31T00:05:00Z – 2022-01-31T03:05:00Z
  • No special event: 2022-02-06T19:00:00Z – 2022-02-06T19:00:00Z
  • SA rotation: 2022-02-12T23:00:00Z – 2022-02-13T02:00:00Z
  • WOL + TCM: 2022-02-14T00:05:00Z – 2022-02-14T09:15:00Z
  • SA rotation: 2022-02-18T00:00:00Z – 2022-02-18T03:00:00Z
  • WOL: 2022-02-21T00:05:00Z – 2022-02-21T03:05:00Z

LTP-07 plans can be refined until Monday ( ) , so we have the chance today to decide the CMS operations.
RAL has already introduced their proposal in


The long-term trend of deposition will be updated here each month.

Deposition / (ng / cm2)

In addition, the CMS sensor temperatures and Solar Array temperatures: (ºC)



Next meeting

Unless there is an ad-hoc request to have another meeting in 2021, we could meet next in January

Proposal for 17:00 CET.

Action Items

New AIs arising from this meeting in bold.

AI-12: MS to provide CMS1 & CMS2 FoV Open (DW will ask MS) important for next VGAM
AI-13: David Williams to investigate SWA temperatures 28th Jan – Open
AI-16: OE will contact Airbus to see what inputs they need from CMS and SOC to compare with their thermal model
    Contacted ADS: Awaiting an answer when the responsible person is back from holidays.
AI-25: Rad and Orcun to take a look at the TGA data when possible, and compare with previous TGAs.

  • No labels