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
12 May 2023
09 May 2023
23 Apr 2023
UT
0550
2216
1703
day of year
132
129
113
F/R
fwd
fwd
fwd
Zone
4
3
3
Confidence Level
99%
98%
98%
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:
( 202, -62, 12 )
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.