Operations / Software Comments - 08/05/04 TIDE Telecon

Operations:
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On 07/27/04 at 23:40 UT, TIDE's high voltage was disabled due to high counts 
near the radiation belt.  High voltage was turned off 07/28/04 at 11:36.  High 
voltage was ramped from 17:03-18:05 on 7/28.  The high voltage was disabled 
again 07/29/04 at 12:10 for the same reason.  High voltage was turned off at 
17:35.  Before anything was done to get TIDE back up, at ~20:15, there was a 
load shed event on the Polar Spacecraft.  According to Nicky Fox, analysis of 
the data indicated a possible single event upset (SEU) in either the Power 
Supply Electronics (PSE) or Command Decoder Unit (CDU) possibly due to the 
space weather effects from last week's storm.  The battery voltages did not 
drop to the load shed threshold at any time nor were there any power problems 
with the primary transmitter/SSPA string.  The Polar GGS Telemetry Module was 
reset on 07/30/04 at 02:55.  TIDE's low voltage was turned back on 08/02/04 
at 18:15.  TIDE software patches were reloaded and the high voltage ramped
on 08/05, 18:14 - 19:25 UT.

In order to try to prevent another high voltage shutdown near the radiation 
belt, the l-shell cut-off for entrance into the radiation belt from the south 
will be raised from 6.5 to 7.0 starting 08/07/04.  There is a list of all 
changes in the radiation belt l-shell cutoffs since 1996 at
http://satyr.msfc.nasa.gov/tideteam/TIDE_info/lshell.cutoffs.

Reminder:  A record of non-standard TIDE Operations is now kept current on the
web.  You can get to the site by clicking 'TIDE/PSI Operations' on one of the 
TIDE home pages or by bookmarking
http://satyr.msfc.nasa.gov/TIDE/tide_operations.html.  Note: only 2003 and 2004
are up-to-date.


Software:
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The TIDE data archive at GSFC will run out of space in October if we do not get
more disk space.

tide_lz_v5.8.1 was released on 07/14/04.  The only differences in tide_lz_v5.8.0
and tide_lz_v5.8.1 are some of the velocity distribution plot options needed to
be corrected in order to handle the new processing options correctly and some of
the labels on the plots dealing with the new processing options were changed to
make them clearer.