[OZAPRS] Delayed traffic ?

[Terry Neumann]

Gentlemens (and ladies if there be any),

I've been doing some visual obs on the ISS in the past three days or 
so.   It seems to be about 2-3 minutes behind what my tracking programs 
claim.

The keps in use are the latest weekly's from AMSAT, but both 
InstantTrack and Orbitron give acquisition and pass details a few 
minutes ahead of what I actually see outside of the back door.    Both 
nights I was on the point of giving up only to see it appearing low on 
the south-western sky - well behind where I expected it to be.

My computer clock is fairly close to the mark; I've been using an 
on-line source to update, and a recent check on WWV suggests that it is 
pretty well on the mark.. It could be - and almost certainly is - the 
case that there is a problem here with keps or time or something, but 
it's not obvious at the moment.  However if my obs are correct, it may 
be a factor in what Andrew is seeing. 

BTW last night ISS was really spectacular in a pass very close to 
overhead at my QTH. :-)

And for the space minded here is a link sent to me by gliding friends 
earlier today - I suspect that some of them are on the ISS.  I initially 
thought one of the pics just might be taken over New Zealand, but it 
doesn't completely agree with my reading of the maps here.    Amazing 
stuff however .... 8-)

http://www.texasjim.com/NASApix/NASA%20pix.htm

FWIW
73
Terry
VK5ATN

Andrew Rich wrote:

>This is the first time I have seen this, the other day i was looking at
logs
>of ISS.
>
>I had 3 independant tracking systems telling me that ISS was over water
out
>in an ocean no where near me.
>
>And yet i saw some data logged from the IS that was out of sink.
>
>So I thought it may be a station doing a replay but there was more than
one
>station involved.
>
>ISS went down below the horizon at 19:14 local, and then while I was
getting
>ready for the next pass, I noticed this "extra" data came in from the
APRS
>IS.
>
>The data in this log, comes from a perl script that writes live to a
file.
>
>I know the ISS times are correct, because I heard the satellite. ie the
sat
>times are correct.
>
>
>14/01/2008 20:46:05
>VK4TEC-6>BEACON,RS0ISS-4*,WIDE,qAo,VK3JTM-5:T#268,001,001,015,011,147,111
111
>11,1111,0
>14/01/2008 20:45:55
>VK4TEC-6>BEACON,RS0ISS-4*,WIDE,qAO,VK4TEC:T#267,001,001,016,012,124,11111
111
>,1111,0
>14/01/2008 20:45:53 RS0ISS-4>CQ,SGATE,qAO,VK4TEC:Welcome to RS0ISS's
message
>board
>14/01/2008 20:45:51 RS0ISS-11>VK2MAL,qAO,VK4TEC: <>:
>14/01/2008 20:45:39 RS0ISS-11>VK2MAL,qAO,VK4TEC: <>:
>14/01/2008 20:45:24
>VK4TEC-6>BEACON,RS0ISS-4*,WIDE,qAo,VK3JTM-5:=2734.44S/15306.20E`ISS
Ground
>station
>14/01/2008 20:45:15
>VK4TEC-6>BEACON,RS0ISS-4*,WIDE,qAo,VK3JTM-5:T#263,001,001,015,010,125,111
111
>11,1111,0
>
>14/01/2008 20:40:25 ------------------------- VK4TEC: Satellite ISS up at
>this time
>
>14/01/2008 20:06:06
>VK4TEC-6>BEACON,RS0ISS-4,ZL3GR*,qAr,ZL1AMW-14:T#721,001,000,015,011,099,1
111
>1111,1111,0
>14/01/2008 20:05:12
>VK4TEC-6>BEACON,RS0ISS-4,ZL3GR*,qAr,ZL1AMW-14:T#714,001,001,015,012,165,1
111
>1111,1111,0
>14/01/2008 20:04:26
>VK4TEC-6>BEACON,RS0ISS-4,ZL3GR*,qAr,ZL1AMW-14:T#709,000,001,015,011,144,1
111
>1111,1111,0
>14/01/2008 20:04:19
>VK4TEC-6>BEACON,RS0ISS-4,ZL3GR*,qAr,ZL1AMW-14:T#708,001,000,015,011,122,1
111
>1111,1111,0
>14/01/2008 20:03:52
>VK4TEC-6>BEACON,RS0ISS-4*,WIDE,qAo,VK3JTM-5:T#705,001,001,014,010,126,111
111
>11,1111,0
>14/01/2008 20:02:13
>VK4TEC-6>BEACON,RS0ISS-4,ZL3GR*,qAr,ZL1AMW-14:T#699,001,000,015,012,132,1
111
>1111,1111,0
>
>14/01/2008 19:14:58 ------------------------- VK4TEC: Satellite ISS down
at
>this time
>
>
>
>
>-------------------------------------------------------------------------
---
>Andrew Rich VK4TEC
>vk4tec at people.net.au
>http://www.tech-software.net
>
>
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>Ozaprs at aprs.net.au
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>
>  
>

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