|
A directory containing daily ftp-downloadable files containing readout-by-readout
listings of HET housekeeping paramaters (Voltages, Temperatures, Offsets).
The naming convention of the files is uly_het_full_house_YYYDDD.txt, where YYY
indicates the three-digit year since 1900 (e.g. YYY=090 for 1990, and YYY=102 for
2002) and DDD indicates the three digit day of year (Jan. 1 = 1).
In each file, following a detailed description of the format, the data consist of a
a listing of HET housekeeping parameters measured at the time listed in the first
4 columns of each line. Each line contains data for one readout of the parameters.
The first 4 columns give the time of the measurement as fractional year (to 12
decimal places) and as year since 1900, day of year, and ms of day.
At the most common science telemetry rate, 2048 bps, each parameter in this file
is read out once every 256 seconds. The measurements are instantaneous, and do
not represent an average of values over the interval since the last readout.
The sole function of these parameters is to monitor instrument health.
No noise-removal or despiking has been done, so caution must be used in
interpreting isolated large increases or decreases in the measured parameters.
|
