Ginga Specific Software: Program BGDSAA37
Program bgdsaa37 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 represents a time counter with a different decay
rate. Bgdsaa37 differs from bgdsaa
as the model of the SAA includes the 37-day precession of the
Ginga orbit.
A Ginga CUBE or TIME series into which it is desired to
insert the parameters.
Bgdsaa37 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 induced
radiation 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). |
Bgdsaa37 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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