This page (revision-34) was last changed on 07-Dec-2016 14:14 by JianSun

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At line 139 changed one line
It's clear that: if using start-time & end-time in fits header, then the calculated MDP data volume is 0; if using raster duration to get end-time, only partial MDP data packets will be counted; using study duration seems fine to get completed data volume.
''It's clear that: if using start-time & end-time in fits header, then the calculated MDP data volume is 0; if using raster duration to get end-time, only partial MDP data packets will be counted; using study duration seems fine to get completed data volume.''
At line 141 added one line
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At line 143 added 15 lines
Another example: eis_l0_20080501_190013.fits.gz:
start: 2008-05-01T19:00:13\\
end: 2008-05-01T19:01:35
[{Image src='images/dcgifs/eis_l0_20080501_190013.fits.gz.gif}]
''For this fits file, if using start-time & end-time in fits header, then only half MDP data packets are counted, which making compression factor double; if using raster duration and study duration to get end-time, both will get completed data volume and generate reasonable compression factor.''
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However, at this stage, not sure which one is not correct: time in fits header or time in MDP packet curve?
This mismatch, ie. the data coming is slower than the expection, might explain MDP data recorder full on-board, for example, in the case that EIS data packets for previous and current studies are coming very close in time!
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This page (revision-34) was last changed on 07-Dec-2016 14:14 by JianSunTop