The center of the geoflares is at the Sun's declination,
so it currently moves north. But to have the operational
geosats a degree further north, you must travel six degrees
south on the Earth's surface.
Also note that the center of the Earth's shadow is at
the anti-solar right ascension at local midnight,
but at the opposite declination of the Sun!
It is offset by the observers latitude, and also by
the time of night. It moves < -00:10/hour in R.A.
Also note that some geos (including XM-1/2?) have
booster reflectors (at 60 deg angles?) causing extra
flares 3-4 hours before/after expected maximum.
Sun at 22:46 Latitude: 0 0 0 40 40 40 60 60 60
-7.8 Time 20:00 23:00 24:00 20:00 23:00 24:00 20:00 23:00 24:00
Shadow radius: 9.36 10.13 10.19 9.02 9.73 9.79 8.65 9.31 9.36
Declination offset: 0.00 0.00 0.00 -5.80 -6.25 -6.29 -7.50 -8.06 -8.11
RA offset: 00:32 00:10 00:00 00:23 00:07 00:00 00:14 00:04 00:00
Declination: 7.80 7.80 7.80 2.00 1.55 1.51 0.30 -0.26 -0.31
RA: 11:18 10:56 10:46 11:09 10:53 10:46 11:00 10:50 10:46
Excel file available on request.
----- Original Message -----
...
> Question: What do you believe the
> geographic extent of the visibility of this event? And
> which way does it move night after night - north or
> south?
>
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