GEMS17 — Additional data type of time_duration

It would be beneficial if an additional data type were available within GEMS of a time duration (time_duration). This allows for specification of a time offset. The suggested format would be:

[-]HH:MM:SS[.fffffffff]

Existing ground equipment solutions currently have time offsets and having this support would enable smoother and more accurate support and integration with GEMS-enabled products. Existing types do not adequately support providing an offset time duration format.

Defer to next GEMS RTF

Defer this ticket to the next GEMS RTF. Carry over the following:

To be consistent with the existing ASCII and XML PSMs, use a subset of the utime attribute encoding for a new "duration" attribute as follows:
[-]hh:mm:ss[.nnnnnnnnn]
The negative '-' sign is optional and used to go back in time.
The subseconds ".nnnnnnnnn" is also optional and ".0" is not required.