ISS passes, three goodies tomorrow and two more on Monday

[Channel Hopper]

http://www.n2yo.com/passes/?s=25544

Those with the right kit

Downlink - 145.800

Uplink - 437.800

 

[Vipersan]

I now have the capablity for recieving the downlink frequency using the SDR setup ..
But what to expect CH ..
Audio coms ..or sstv perhaps ?
it _should be within the QFH s resonance range .. ..and the QFH is omni directional ..
but dedicated to RHCP ..
Should have no probs with a linear broadcast ..but woul null out LHCP
So what parameters to expect ?
wfm
nfm
AM
?
bandwidth etc
cheers
VS

 

[PaulR]

Probably NFM. I'm fairly sure that was the mode used when I saw a demo some years ago.

Don't forget to allow for Doppler shift!

 

[Vipersan]

Ok ..got Orbitron tracking the ISS ..and controlling SDR ..so adjusting for doppler shift ..
I need a few more parameters ..but I'm ready to go ??
rgds
VS

 

[Channel Hopper]

http://spaceflight.nasa.gov/station/reference/radio/

 

[Vipersan]

Sitting here waiting for the imminent pass of ISS ..with the SDR tuned to the downlink frequency ..145.800
Probably be silent as the grave ..but I can hope..
Better that than sitting outside in a deckchair staring at a heavy black cotton wool heavenly canopy ...with no breaks for starlight to peek through.
Hope you fare better at your QTH ..
rgds
VS

 

[Analoguesat]

Reasonably clear here, so I'll be heading outside in a few minutes

 

[Vipersan]

Reasonably clear here, so I'll be heading outside in a few minutes

Good hunting buddy ..
No chance here ..it is Manchester after all ..
Bonne Chance

 

[Channel Hopper]

Really clear here and she is going right overhead, possibly the brightest I've seen to date.

 

[Analoguesat]

Caught the end of the pass, blimey that was BRIGHT!

Cloud blew over at the critical moment and I thought I was going to miss out, but she did me proud

 

[Vipersan]

Well ..in radio terms ..that was the biggest non event I ever heard ..
Zip ..nada ..nowt..
I have recorded about 15 minutes of baseband waterfall to analyse ..but on frequency ..just static static and more static
..and not even clear enough to go outside and sneak a peek..
c'est la vie

 

[Analoguesat]

For anyone still up around midnight she will be back around for a 2 min pass 2349-2351

 

[Piltdownpaul]

Just passed over a minute ago

 

[Channel Hopper]

Another really bright pass tonight at 22.15.

 

[Vipersan]

Yep ..I swear I saw it ..but can't be sure CH ..
Travelling West to East ..twinkling as it went ..
Not directly overead ..probably a rough estimate looking South ..and declined by about 20 degrees..
Took approx 5 minutes to traverse ..
??
Would that be it ?
I wasn't watching for it but was actually looking for more perseids ..so not armed with bins..
dammit

 

[Channel Hopper]

A couple of shots of tonights pass
View attachment 56796

 

[Analoguesat]

Great pics CH.

Max altitude for Manchester was ~62 degrees on this last pass VS.

Just caught a 10 second glimpse up heer as it passed between 2 big banks of cloud

 

[Vipersan]

Great pics CH.

Max altitude for Manchester was ~62 degrees on this last pass VS.

Just caught a 10 second glimpse up heer as it passed between 2 big banks of cloud

Sounds about right then ..
declined from the overhead by about 20 to 30 degrees ..
Well ..I'm convinced
The timing was about right when I checked with Orbitron.

 

[Analoguesat]

Its very bright when its a clear evening and a decent pass, you cant miss it.

 

[Vipersan]

Its very bright when its a clear evening and a decent pass, you cant miss it.

Ahhh yes but this is Manchester AS .
A lot of high cloud tonight ..and getting thicker by the minute..
So ..obscured at best it was ..young skywatcher