On 08/02/11 07:46, Guy Harris wrote:
The "day of year" format code was introduced to support a couple of CCSDS:
http://en.wikipedia.org/wiki/Consultative_Committee_for_Space_Data_Systems
protocols. The code it replaced displayed the day-of-year as 0-origin; however, this document:
http://public.ccsds.org/publications/archive/301x0b2s.pdf
speaks of day-of-year as being 1-origin, at least for the ASCII time code formats.
Unless the NASA guys who contributed the packet-ccsds.c and packet-vcdu.c dissectors would like to argue that, in their dissection, a 0-origin day-of-year works better, in which case we should support both 0-origin and 1-origin display formats, I would suggest switching to a 1-origin display format and see whether we get a complaint from any space data people (in which case we should add a separate 0-origin format).
The IRIG 200-04 standard encodes dates as 'day of year' with 1-origin as
well.
https://wsmrc2vger.wsmr.army.mil/rcc/manuals/200-04/TT-45.pdf
http://en.wikipedia.org/wiki/IRIG_timecode
Stephen.
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