Orbital context (default RSW placement)
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.
New proposal for the grey shading representing downlink rates:
- white = maximum downlink rate at which you can empty the SSMM in ~10 days
- light-grey = empties with everyone operating
- mid-grey = fills within RSW (10 instruments operating) and empties outside RSW (IS-only breakeven rate < downlink rate < inside-RSW breakeven rate )
- dark-grey = fills with just IS operating (downlink rate < IS-only breakeven rate)
RS window (default) placement
Period | Window/GAM | EXT Start | Start | End | Hcentric | Distance | Range | Hgraphic | Latitude | Range | SC-Sun- | Earth | Angle | Conjunction | Safe Mode Comms Blackout | Largest Comms Roll | GAM Restrictions |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MTP 12 | South | ||||||||||||||||
| MTP 12 | Perihelion | ||||||||||||||||
| MTP 12 | North |
GAMs and conjunctions
- Superior conjunction from 2025-06-25 to 2025-08-27 (based on 5 deg, dates from CREMA - may need to be updated)
- This is the longest conjunction(!) of the mission (64 days, with 5 deg constraint)
- SSMM sizing (at time of writing these sentences, Nov 2021) does not cover this case
- Some sketch of the intended operations through the conjunction is sensible well before the resizing opportunity of July 2025, otherwise the resizing will be heavily driven by the (probably inappropriate) assumption that all instruments run at full HK, LL throughout
- No GAM
Science planning:
Example (from planning exercise SOWG#13):
5 days PolarScience, offpointing (RSW 1)
15 days Pole-to-Pole, disk centre (RSW 1+2)
10 days SlowWindConnection, feature tracking (RSW 3)