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Дата изменения: Wed Jun 28 23:03:36 2006
Дата индексирования: Sat Dec 22 07:09:11 2007
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Поисковые слова: южная атлантическая аномалия

XMM-Newton Science Analysis System


oal (oal-3.115) [xmmsas_20060628_1801-7.0.0]

Meta Index / Home Page / User-visible functionality / Environment variables

SAS_TIMECORR

The conversion of Spacecraft-Onboard-Time (OBT) to Mission-Elapsed-Time (MET) tags can use either standard Time Correlation (TCS) data produced in real-time or Reconstructed Time Correlation data (TCX) produced through a reprocessing process designed to eliminate anomalies present in real-time data, stemming from timing issues in the XMM Ground Segment.

The environment variable allows the user to control this in the following manner:

value of SAS_TIMECORR	meaning
TCS	consider TCS data only; raise error condition if missing from ODF
TCS:TCX	first consider TCS data; if missing but TCX is present read TCX data; raise error condition otherwise, i.e. if both are missing
TCX:TCS	first consider TCX data; if missing but TCS is present read TCS data; raise error condition otherwise, i.e. if both are missing
TCX	consider TCS data only; raise error condition if missing from ODF

If the variable is not set the default behavior is identical to the setting SAS_TIMECORR=TCX:TCS.