About j2ms2

j2ms2 is a subjob-based correlator data to MeasurementSet translator. It enables the user to concatenate data of one or more sub-jobs into a single MeasurementSet.
 
Command syntax:
 
  j2ms2   [<options>, <databuffers>]
 
  where:
 

<options>

may be zero or more of:
 

-o <file>	set output MeasurementSet name (override default value)
-d <domain>	set output data domain. Valid values are [time|frequency]
-f <file>	Read databuffers to translate from file <file>. Mutually exclusive with any other mode of operation.
-v <file>	Read file <file> and interpret as .lis file format. Format definition can be found here. This mode is also mutually exclusive to any other mode of operation. UPDATE UPDATE UPDATE The default *.lis file processing interprets the scanlabels found in the lis file as "first,last"(inclusive) scan to process, hence only data from these scan(s) will be written to the MS.
-V <file>	Backward compatibility *.lis mode: do NOT interpret the scan-labels from the lis file as first/last scan to process. All data with output-vex-file-defined scans will be written to the MS.
(unlisted :-)
-c <connection>	connection where extra debug output should be written. Note: <connection> has a syntax of its own. This syntax is deliberately left out of this documentation

<databuffers>

are zero or more names of databuffers to be translated.

  ******** IMPORTANT NOTE ********
  It is important to realize that j2ms2 either runs in interactive or non-interactive mode.

• In interactive mode j2ms2 prompts the user for each subjob to be translated. Also it asks (when apropriate) if data should be concatenated (i.e. if the output MeasurementSet already exists).
• In non-interactive mode, j2ms2 does not ask for buffers nor for confirmation; it translates all buffers mentioned into one output MeasurementSet.

  j2ms2 runs in interactive mode if and only if there were no databuffers mentioned on the commandline!
 
 

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A word or two about formats

j2ms2 reads two formats of correlator output format. The oldest 'format' is the binary dump of correlator data together with a set of ini-files to pass information to the system. This format is known as 'Albert's format'. Since the development of the official correlator output format files are written according to the 'Correlator Output Format' or COF for short.
 
  At startup, j2ms2 tries to determine which format is used. Depending on which format is found, j2ms2 expects different things.
 
 

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Marjolein Verkouter

Last modified: Tue Mar 28 09:49:53 MET DST 2000