Ginga Specific Software: Program BGDSAA
Program bgdsaa inserts psuedo-housekeeping parameters into
an existing data file. These new parameters are called SAA_1,
SAA_2 etc. and represent the radiation induced in
Ginga by passage through the South Atlantic Anomaly (SAA). Each
parameter is a time counter with a different decay rate.
A Ginga CUBE or TIME series into which it is desired to
insert the parameters.
Bgdsaa requires four input parameters. The QX parameter
system is used to read these parameters.
| BGD_DATIN | The name of the CUBE or
TIME series. |
|
| | BGD_RETRO | In order that the time
counter is well estimated at the start of the data it is necessary to
track the passage of Ginga through the anomaly for some period
before the start of data file. This parameter defines this period (in
hours). The numerical value should be at least 24 hours and at least a
factor of 3 greater than the largest decay. |
|
| | BGD_NDECAY | The induced radiation
caused by passage through the SAA decays exponentially at various
rates. This parameter defines how many separate decay rates are to be
included. |
|
| | BGD_DECAY(BGD_NDECAY) | This parameter
defines the decay rates (in hours). |
Bgdsaa returns three output parameters. The QX parameter
system is used to display these parameters.
| BGD_RETRO | The period (in hours)
during which the passage of the satellite was tracked through the
anomaly prior to the start of the data. |
|
| | BGD_NDECAY | The number of separate
decay rates included. |
|
| | BGD_DECAY(BGD_NDECAY) | The decay rates
(in hours). |
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