Darmstadt solar outage


David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

Date Begin Peak End Closest
2003 Oct 12 12:30 12:37:43 12:44 UTC 0.59°
2003 Oct 13 12:30 12:37:29 12:44 UTC 0.22°
2003 Oct 14 12:29 12:37:15 12:44 UTC 0.15°
2003 Oct 15 12:30 12:37:02 12:44 UTC 0.52°

According to my calculations, we are near the worst solar outage for
MSG-1 as viewed from Darmstadt. The missing segments for today and
yesterday seem to bear this out..... Right now, my own system is
still hoping to get more 1245 data, while it's actually 1300 data
that's coming in....

(The above figures are using a DVB installation - clearly not
representative of either the antenna diameter or the frequency in
use, but it's a starting point...).

Cheers,
David


a_van_belle
 

--- In MSG-1@yahoogroups.com, "David Taylor" <david-taylor@b...>
wrote:
According to my calculations, we are near the worst solar outage
for MSG-1 as viewed from Darmstadt. The missing segments for today
and yesterday seem to bear this out.....
You're right David, I did not expect that solar outage could have
such a drastic effect on the MSG-1 downlink to Eumetsat.
With a large dish the outage will be short. The operators probably
won't take any risk and stop receiving for some time.

The report does mention what they call "Sun-Sat_collinearity".
Guess that Hotbird 3 is a typo and should have been Hotbitd 6.

See part of the report below:

MSG1 Administration Message for 11/10/03

Issued on 12/10/03 at 15:33

MSG EUMETCast TEST DISSEMINATION:
HRIT:- 4 repeat cycles per hour.
LRIT:- 2 repeat cycles per hour (hh:15-hh:30 and hh:45-hh:00) +
Foreign Satellite Data + MDD + DCP.

Note: Due to the effects of the MSG1 eclipse there may be a
degredation of image quality for several repeat cycles around
midnight.
Note: Dissemination may be effected by the MSG-1 Sun-Sat-Collinearity
from 10/10/2003 until 20/10/2003 at around 12:35. Users may
experience local effects of Hotbird 3 Sun-Sat-Collinearity from
08/10/2003 until 16/10/2003. The time will vary with location.

Report for 10/10/03:-
Repeat cycle 22:30 was interrupted. Repeat cycles 2245-2315 were not
disseminated.

Report for 11/10/03:-
Repeat cycle 12:45 was interrupted due to Sun-Sat-Collinearity.

Report for 12/10/03:-
Repeat cycle 12:30 was interrupted due to Sun-Sat-Collinearity.



Greetings,
Arne van Belle