There is a problem with the motor controlling the High Gain Antenna on the SOHO spacecraft. Science data coverage may be less than complete for 1-2 weeks every 90 days (when the spacecraft gets 'flipped'). The next "keyhole" period can be found in this table.
Most Recent Shock Candidates:
Dates
15 Jun 2022
06 Jun 2022
19 May 2022
UT
0406
0922
1331
day of year
166
157
139
F/R
fwd
fwd
fwd
Zone
3
1
2
Confidence Level
98%
60%
77%
The predicted position of the SOHO spacecraft in the GSE coordinate system (X,Y,Z) in Earth radii at 0610 GMT on Oct 15, 2020:
( 201, 0, 16 )
The Proton Monitor (PM) is one of the scientific sensors in the Charge, Element, and Isotope Analysis System (CELIAS) instrument package aboard the SOHO spacecraft.