Changes between Version 7 and Version 8 of ExplanationOfStages


Ignore:
Timestamp:
09/21/07 16:47:21 (17 years ago)
Author:
VincentMcIntyre
Comment:

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  • ExplanationOfStages

    v7 v8  
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    6  1. We plan to start with simulated CABB output files, which should be available by 2007 Oct. Many of the CABB output formats have been written already, by various observatory systems (MOPS, Parkes DFBs) using the ATNF's standard RPFITS library; the changes to Miriad mainly relate to handling the larger number of IFs and spectral channels within the data files. Shortly after the first test data starts appearing (Nov 2007) it will be possible to read it into Miriad and do basic processing of the full bandwidth, under the same assumptions as present about which calibration parameters have negligible variation with frequency across the bandpass. At this stage interactive review and flagging of the UV data will be necessary. Some changes to the data selection subroutines and the INVERT task may be needed before images can be formed.
     6 1. We plan to start with simulated CABB output files, which should be available by 2007 Oct. Many of the CABB output formats have been written already, by various observatory systems (MOPS, Parkes DFBs) using the ATNF's standard RPFITS library; the changes to Miriad mainly relate to handling the larger number of IFs and spectral channels within the data files. Shortly after the first test data starts appearing (Nov 2007) it will be possible to read it into Miriad and do basic processing of the full bandwidth, under the same assumptions as at present about which calibration parameters have negligible variation with frequency across the bandpass. At this stage interactive review and flagging of the UV data will be necessary. Some changes to the data selection subroutines and the INVERT task may be needed before images can be formed.
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    88 2. The next phase is to create scripts that will process the entire bandwidth in sections, relieving users of a lot of book-keeping. This will be ready when CABB stage 1 is complete (Apr 2008). These scripts could trivially be made to process the data for the separate frequency bands in parallel and thus make good use of multi-processor machines or clusters. Forming continuum images by summing deconvolved images of the subsections will somewhat limit the quality that can be achieved.