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CX2SA > SATDIG 16.01.09 23:44l 79 Lines 2187 Bytes #999 (0) @ WW
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Subj: AMSAT-BB-digest V4 28
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Sent: 090116/2237Z @:CX2SA.LAV.URY.SA #:1840 [Minas] FBB7.00e $:1840-CX2SA
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: ISS Keplerian elements (Ransom, Kenneth G. (JSC-OC)[BAR])
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Message: 1
Date: Fri, 16 Jan 2009 13:40:42 -0600
From: "Ransom, Kenneth G. (JSC-OC)[BAR]" <Kenneth.G.Ransom@xxxx.xxx>
Subject: [amsat-bb] Re: ISS Keplerian elements
To: "Pierre van Deventer" <pierrevd@xxxx.xx.xx>, <amsat-bb@xxxxx.xxx>
Message-ID:
<A2862DA1C49F4145AF6C2A452829403502675967@xxxxxxxxxx.xxx.xxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
When the ISS does a reboost (like it did on Jan 14), it is usually a
significant change in orbit. The predicts seem to take about 3 days to
sync back up (even though they start getting closer about 24 hours
later).
Just another one of the challenges of the ISS, they make changes quite a
bit so you have to be on top of the daily activity schedule.
Kenneth - N5VHO
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Pierre van Deventer
Sent: Friday, January 16, 2009 1:26 AM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] ISS Keplerian elements
Regarding ISS and the accuracy of the predictions.
The same was noted yesterday at around 14:00 UTC. AOS was about 2.5
min's
late and was able to work via the cross band repeater until it was 5
degrees
below the horizon!
My Keplerian data and PC clock is up to date, I also suspect that there
was
an orbit change and the "new" Keplerian data has not been made
available
yet?
73, Pierre ZS6BB
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End of AMSAT-BB Digest, Vol 4, Issue 28
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