This page (revision-76) was last changed on 07-Dec-2016 14:14 by BriazWearl

This page was created on 25-Jun-2008 06:03 by David R Williams

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SbandObservingInfo
SbandObservingInfo

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At line 47 changed one line
There is often a substantial overlap between SAA and NGT events around the orbit. However, the phase of EUV night does not change phase in the orbit (whereas that of the SAA does). Therefore eclipses and SAA passes sometimes coincide (with night being the longer event), and sometimes do not overlap so much. However, there is almost always some overlap. (The exception to this is during the Golden Period, during which there are no SAA periods, but EUV nights continue to occur once per orbit). As a result, a some parts of the day, the less-than-complete overlap of SAA and night means that the clear window for observing in such orbits can be shorter.
There is often a substantial overlap between SAA and NGT events around the orbit. However, the phase of EUV night does not change phase in the orbit (whereas that of the SAA does). Therefore eclipses and SAA passes sometimes coincide (with night being the longer event), and sometimes do not overlap so much. However, there is almost always some overlap. (The exception to this is during the Golden Period, during which there are no SAA periods, but EUV nights continue to occur once per orbit).
At line 49 added one line
As a result, a some parts of the day, the less-than-complete overlap of SAA and night means that the clear window for observing in such orbits can be shorter. Taking into account the buffers (summarised below) around orbital events, the distribution of clear observing windows, calculated from a typical mid-eclipse season OBEV file, ranged from 58 to 68 minutes, with a modal value of 61 minutes.
At line 51 added 2 lines
This page (revision-76) was last changed on 07-Dec-2016 14:14 by BriazWearlTop