LTP10 has been agreed to run from 2022-12-26T00:00:00.000 until 2023-03-13T00:00:00.000
(see SWT-32 MoM)

Orbital context

Plots are in GSE (geocentric solar ecliptic) coordinates, so Earth is at [0,0], the Sun is at [1,0]. The plot is the projection of the orbit on the ecliptic plane. 

Animated Version: Orbit_GSE_2023H1.mp4

Definition for the grey shading representing downlink rates:

  • white = maximum downlink rate at which you can empty the SSMM in ~10 days
  • light-grey = SSMM fill state decreases with everyone operating at EID-A rates
  • mid-grey = SSMM fill state increases within RSW (10 instruments operating) and decreases outside RSW (IS-only breakeven rate < downlink rate < inside-RSW breakeven rate )
  • dark-grey = SSMM fill state increases with just IS operating (downlink rate < IS-only breakeven rate)

RS window placement

As agreed during the SWT-32, all 3 RS windows in the orbit H1-2023 will take place during LTP11 Q2-2023.

No RSWs during LTP10.

GAMs and conjunctions


Science and calibration planning

Note the text in red highlights adjustments still to be made in SOOP Kitchen plan during Long Term Planning

Coordinated science (and cross-calibration) campaigns:

IS calibrations:

RS calibrations:

Following opportunities may be of interest of one or several RS instruments. Actual operations TBC still.

  • 2023-01-03: Mercury transit - more details in TN-Mercury_Venus-2023_v2.docx
  • 2023-02-02: Sigma Sgr occultation (with kernels as of 19th Aug 22, the star does not occult. Moreover its closest approach is 8.3 arcmins above the limb and 8 arcmins above the limb is the limit where the theoretical 16' FOV would be expected to catch it. Flight Dynaimcs included the offpoints and we are not telemtry constrained in this LTP so telemetry has been reserved. If in the end we won't see the star in the high res FoVs, geometry is such that we get a "free" pole pointing so we may as well take advantage of it).
  • 2023-01-30T03:48:57 – 2023-01-31T13:08:15: Comet 96P/Machholz transit through Metis FOV

IS-only science:

  • EPD & STIX observations with constant telemetry rates throughout LTPs 10-13

  • Other in situ instruments in high rate whenever within 0.8 au, also beyond 0.8 au in good downlink conditions => high rates throughout LTP10

STPs with Significant Platform Operations:

  • STP-238: Mercury transit; transition to FAR_SUN conditions
  • STP-240: TCM of type 2. MAINT of type ANY in FAR_SUN conditions and associated RS_THERMAL_SAFE; transition to NEAR_SUN conditions; ENG_WIN for SSMM maintenance. Note that as of   the exact payload rules for the ENG_WIN are under discussion with the FCT, as is the possibility of extending the window to cover the pass on 18 Jan as well, in order to finish investigations and perform any additional maintenance required because of the recent SSMM anomaly. This may require that we reissue the EFECS. Rules will be communicated and the EFECS issued by the start of December.
  • STP-240: TCM of type 2. MAINT of type ANY in FAR_SUN conditions and associated RS_THERMAL_SAFE; transition to NEAR_SUN conditions; ENG_WIN for SSMM maintenance 18-19 January. Version2 EFECS containing necessary changes (including HSD movements for EUI-FSI and Metis) issued  . Payload rules for ENG_WIN are as follows:
    1. No payload TCs to be scheduled at all during the ENG_WIN
    2. Payloads wishing to remain on may do so but there will be OBC-TM gaps of ~30s and SSMM-TM gaps of unlimited duration, at any time
    3. Payload wishing to remain on must be prepared for S20 outages during the ENG_WIN, at any time and of unspecified duration
    4. Payload should place themselves in a "safe" state at the start of the ENG_WIN and recover themselves afterwards. "Safe" can be on-in-standby, off, doing science, but MOC won’t be managing it during the engineering operations.
    5. Payload FDIR will be disabled at the PL FMON level (S142 globally disabled) during SSMM reboots/switchovers - any outstanding PL FDIR will be processed following the SSMM reboot, but just delayed by ~45s
      1. For MAG and SWA specifically, the HB timeouts reactions can be disabled for the window duration, to prevent any power-off due to SSMM communication problems. This reaction is already disabled for EUI.

The exact timeline for each instrument should be agreed with your MOC point of contact. All instrument commanding before and after the ENG_WIN should in principle be by IOR.

  • STP-242: Comet Machholz observations; Sigma SGR calibration
  • STP-244: TCM of type 2, MAINT of type ANY in NEAR_SUN conditions

SOOP Kitchen plan

High-level (=MLP) plan:

Starting point for LTP planning by SOWG:

Final plan LTP10:

Version 2 plan with changes for additional ENG_WIN on 18 Jan (distributed ): 

IOR Delivery Schedule:

STP-237 to STP-247 Schedule

Reference material


Version 1 of planning products were delivered by GFTS on  

Version 2 of planning products were delviered by GFTS on  

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1 Comment

  1. Note that a Mercury transit takes place in January 2023.

    Transit conditions to be confirmed after VGAM3.