[Psrfits] Proposed (small) changes to PSRFITS definition

[Dick.Manchester at csiro.au]

Hi all

Partly as a result of some discussion about encoding and decoding of 2-bit data, George Hobbs has requested that the PSRFITS definition include a specification of the digitisation. I'm proposing a new version of the definition (v5.4, attached) which includes a parameter "LEVSEPN" in the Digitiser Counts table. This is defined as the separation of the digitisation thresholds in units of the input rms value. Also at George's request, I'm proposing a new binary OBSDESCR table, which is simply free-format text where any information related to the observation or the processing can be stored, and a new parameter NSTOT in the SUBINT table main header, which is the actual number of valid samples in a search-mode file (the last subint is often incomplete).

Please send any comments (using "reply all") on these changes or other suggested changes to the definition by Tuesday May 6.

Regards
   Dick

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