MIDAS Standard Headers

 

  
Table B.1: MIDAS Standard Image Header

Notes:

1. Presently not used by EXSAS.
2. The default value in EXSAS is 2.
3. For images created with EXSAS , this descriptor contains the coordinates of the pixel at the lower left corner of the image, expressed in the coordinate system indicated by CUNIT.
4. The binsize is expressed in the units of the coordinate system as given by CUNIT.
5. This string indicates the coordinate system that is selected as world coordinate system for the image. In the instance of data images, the choice is between detector pixels (DET_PIX) and sky pixels (SKY_PIX) depending on which relevant photon parameters (XDET,YDET or XPIX,YPIX) were used by the EXSAS binning routines.

For more details on the MIDAS Image Header see the MIDAS Environment document (appendix A).

  
Table B.2: MIDAS Standard Table Header

Notes:

1. For a file of type PET the number of defined rows corresponds to the number of photons written to the table. For a file of type BIN the number of defined rows corresponds to the number of bins of each data set written to the table.
2. The TLABLnnn strings are character descriptors containing specific information for each column. `nnn' is the column number in the range 001,...,TBLCONTR(3). The label for each column is defined by the user for files of type BIN. For files of type PET the standard labels are taken (see Table B.1).
3. Generally, the formats can be selected by the user. Default formats as provided by PROJECTION are F14.4 (standard column labelled S_TI and TIME), E12.5 (data columns, i.e. counts per bin) and I4, I6 or I8 for integer parameters.
4. A descriptor with TBLCONTR(3) elements.

For more details on the MIDAS Table Header see the MIDAS Environment document (appendix A).