SSR Dump Records and Quality Reports


Once SSR dump data is telemetered down from Chandra, it goes through many phases before it reaches the Chandra X-Ray Observatory Center (CXC). The group that makes dump data available for immediate processing is the Ground Operations Team (GOT). As part of their procedure, they issue emails that indicate a new SSR dump file has been recieved and the quality of that dump file. The quality of a dump file is determined by comparing the number of VCDUs missing and the number of VCDU gaps in the GOT file with that of the DSN and JPL records. To understand the naming convention, consider the following example.

1999_206_0426_206_1500_Dump_EM_23513.gz

This file name is broken down into sections of:

Year = 1999
Start day and start time = 206_0426
Stop day and stop time = 206_1500
Data Type(Dump, Real or Merge) = Dump
Time Reference = *EM (Embedded Time)
IDR File Number = 23513
zipped file = gz

*EM (Embedded Time) is the time that the data was recorded onto the SSR.

*HR (HOSC Receipt) is the time the file was recorded onto the NRT at the OCC. All HOSC Receipt times are GMT.

Below you will find a list of SSR dump files for which I have received such emails this past month as well as links to previous months' SSR dump and data quality records.


In addition to specific SSR dump files, two compact data records that summarize the name and data quality of SSR dumps are:


SSR Dump Reports



Web Page Designed and Maintained by:
Shanil Virani - svirani@head-cfa.harvard.edu
(Please feel free to send me any comments or suggestions!)

First Attempt: 14 July 1999 ----- Latest Attempt: 21 September 1999

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