On 01/26/07 at 01:40 TIDE telemetry spin packets stopped being
reported in the Polar telemetry data, possibly the result of a
GTM upset.  

See t0701260140.eng for a list of the TIDE enegineering data.  
The first three major frames (01:40:14, 01:40:23, 01:40:32) are
okay.  The next major frame (01:10:42) is a transition where just 
some of the housekeeping data is missing.  Starting with the major
frame at 01:40:51 and continuing until the TIDE reset was completed
at 14:35:38, only satellite housekeeping was reported in telemetry
(input current, +5V monitor, 4 temperatures).  See t0701261435.eng
for the housekeeping data after the reset.  From 01:40:32 until 
14:35:38, no TIDE spin data was received.

t0701260000_0140_sp.eshtr.gif is a spectrogram of the data just 
prior to the telemetry problem.  It doesn't show any problems.

From 14:30 to 15:02 the high voltage was turned off, TIDE was
reset, software patches were loaded, and TIDE was set up for the
HV ramp. Due to the lack of DSN real-time coverage, the high
voltage was not ramped until 01/29 from 15:15 to 16:31.  At that
time, Polar was near a dayside apogee so that the mirrors didn't
step backup fully because of high counts.  They did come back up
later.

t0701291529_2230_sp.eshtr.gif is a spectrogram of LZ data during
and after the HV ramp until the start of the radiation belt.
t0701311613_1715_sp.eshtr.gif is a spectrogram of NRT data from a
quieter period 2 hours after perigee.