ISS sighting opportunities

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Tron

SatelliteGuys Master
Original poster
May 6, 2005
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Metro New Orleans, LA
Maybe slightly off-topic, but still related to satellite, I just came inside from watching the ISS (International Space Station) fly over New Orleans. The sky was clear and cold, which makes for a perfect view. The ISS is probably the brightest object in the night sky (other than the Moon, of course).

Knowledge of how to find satellites in the sky (directions, degrees above the horizon) that we use while aiming dishes is very helpful in finding the station's path. NASA provides a page which lists future sighting opportunities in your area here. Have fun!
 
Maybe slightly off-topic, but still related to satellite, I just came inside from watching the ISS (International Space Station) fly over New Orleans. The sky was clear and cold, which makes for a perfect view. The ISS is probably the brightest object in the night sky (other than the Moon, of course).

....

Heavens-Above Home Page is a good sight to help with ISS sightings, as well as others.


Even brighter than the ISS, and if I remember right, even brighter than the moon, are the Iridium Flares. Those things are really neat.
Basically, the Irridium sats are communications satellites, and they have a mirror surface that will reflect the sun to a very narrow spot on earth, and when you are near the spot it is reflecting to, it is VERY BRIGHT. You can google Irridium flares for more info, but the above Heavens above site has a link for predicting when to see the flares. You need to set up your latitude/longitude AND time zone (on a couple occasions, I organized sort of a party to watch a flare, only to find out that I had used the wrong time zone, and we were watching at the wrong time).
If you see one predicted to be near you, it might be worth the drive to go a few miles to get directly under the path of the flare, because even 5 or 6 miles will make a big difference in the intensity of the observed flare.

If you are near the path of a flare, and look at the right time, what you'll generally see, is a very dim satellite going across the sky, then, at the predicted time, that dim satellite will suddenly get very bright for just a couple seconds. It takes a lot of planning to be looking at the right time, but it's worth the effort to see one at least once.

Another neat thing to do with any satellite, particularly the ISS, is to get a prediction program (or one of the web pages) that will not only show the predictions for where and when the sat will be in the sky, but also show whether it is illuminated or not. What is neat, is when a sat like the ISS goes from sunlight into the shadow of the earth, that very bright sat just suddenly dissappears, (or appears, if it's going from shadow into light). If you have a telescope, you can also do the same thing with the moons of Jupiter. Ie there are charts in the various astronomy magazines' web pages that will show you at which times the moons of Jupiter will go into the shadow of Jupiter. Again, if you have the time correct, you can be watching Jupiter's several moons, and suddenly one of them will dissappear or appear. Pretty neat.


EDIT: I just checked, and the Irridium flares are NOT as bright as a full moon at least.
[ame="http://en.wikipedia.org/wiki/Apparent_magnitude"]Apparent magnitude - Wikipedia, the free encyclopedia@@AMEPARAM@@/wiki/File:65Cyb-LB3-apmag.jpg" class="image"><img alt="" src="http://upload.wikimedia.org/wikipedia/commons/thumb/8/87/65Cyb-LB3-apmag.jpg/350px-65Cyb-LB3-apmag.jpg"@@AMEPARAM@@commons/thumb/8/87/65Cyb-LB3-apmag.jpg/350px-65Cyb-LB3-apmag.jpg[/ame]

Also, as the ISS gets bigger and bigger, it's been getting brighter and brighter, so references to it's magnitude are constantly changing.
 
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I use this website tracking | ISS Fan Club and with my Bearcat scanner hooked to my computer and running a AGW packet engine, I able to copy the APRS station onboard the ISS. one to three seconds of packet data gives me a few ham radio messages. There is a very close pass to the home QTH at 9:30 EST. ThanKs Tron for reminding me that the ISS is out there. On these cold winter nights it some thing to do tracking the ISS and seeing if I can get packets from them
 
Didn't hear the ISS tonight, according to ISS fan club website the packet radio has been turned off for the last couple of days, Oh well I will try again later tonight.
mikelib
 
I've never tried for anything from the ISS. I was going to last year when they had the SSTV system going for a while, but I got lazy and didn't get an antenna put up outside. I did hear the Sputnik 40th anniversary satellite that they dropped off of the station about 10 years ago on a desktop scanner, but I didn't think that an indoor antenna would give a clear enough signal for anything other than CW.
 
I use this website tracking | ISS Fan Club and with my Bearcat scanner hooked to my computer and running a AGW packet engine, I able to copy the APRS station onboard the ISS. one to three seconds of packet data gives me a few ham radio messages. There is a very close pass to the home QTH at 9:30 EST. ThanKs Tron for reminding me that the ISS is out there. On these cold winter nights it some thing to do tracking the ISS and seeing if I can get packets from them

Sounds like an interesting hobby! I've often wondered how they allocate data downlink bandwidth on the station. From what I've seen, it appears as though they actually "down-res" much of the video to fit within their bandwidth allotment at the time.

What is neat, is when a sat like the ISS goes from sunlight into the shadow of the earth, that very bright sat just suddenly dissappears, (or appears, if it's going from shadow into light).

This happened yesterday morning during the flyover. The ISS did not appear until it was 30 degrees above the horizon, when it flew past the daylight terminator. When it appeared, it just suddenly "faded in"...
 
Re APRS above, I used to do that back in the 90s. W4APR used to have some sample APRS plots on his web page, one of which was a football run for the Army/Navy game. That plot used to show a sailboat going up Rt 1 across the Md/Pa border. That was me. I had one of the APRS parameters set wrong on my laptop. :) I used to also bounce manual APRS packets off MIR and ISS, sending quick messages back to friends who would be monitoring. I didn't realize that the there was an "APRS station onboard the ISS" now. It used to be that there was just a packet digipeater on board, and when the digipeater was enabled, terrestrial stations could digipeat off the sats with APRS format packets. Seems like back in the 90s, there was an issue that GPSs wouldn't work at the high speeds and high altitudes required to function on those sats, but perhaps that problem has been solved. If so, I'll have to get my TNC out again, and try monitoring again.
Re SSTV, I haven't copied much from the ISS except some non-live images, but I used to copy SSTV images from the MIR when it was still up there. I got a couple nice images of the great lakes area from the MIR. Pretty neat.


EDIT: Link to APRS football run, 1993.
FOOTBALL RUN
When map starts, do a couple ALT-clicks near Md/Pa border, and you'll see a sailboat symbol N3JLQ-8. I was a mobile digipeater trying to provide coverage for the low power helmet transmitters when they were out of range of the main digipeaters. I wasn't using the APRS program, but manually digipeated APRS style packets, but got a byte wrong that specified what symbol showed up on the map, resulting in me showing up as a sailboat sailing up RT-1, instead of a car.

EDIT-2: Link to SSTV images from MIR, over Traverse Bay Mich, received in Maine.
http://www.megalink.net/~wejones/mir-mich.jpg
 
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Here are some message from last years passes over PA. I had no signal from the ISS last night, The repeater must be off. The RSOISS tell you that it the International Space Station

12:32:09R KB1GVR>APU25N,RS0ISS-3* Port=1 <UI R Len=23>:
:WA6YET :Hi Wayne{66

12:32:24R WA0EBZ>ARISS,RS0ISS-3* Port=1 <UI Len=36>:
Hello from Wayne - Osakis, Mn. EN-25

12:32:27R KB1GVR>APU25N,RS0ISS-3* Port=1 <UI R Len=22>:
:KC9DOA-5 :Hi Mike{65

12:32:34R KB1GVR>APU25N,RS0ISS-3* Port=1 <UI R Len=31>:
=4435.75N/06812.36W-FN54 Maine

12:33:08R KB1GVR>APU25N,RS0ISS-3* Port=1 <UI R Len=27>:
:W1CGT :hello foster{67

12:33:36R KB1GVR>APU25N,RS0ISS-3* Port=1 <UI R Len=31>:
=4435.75N/06812.36W-FN54 Maine

12:33:41R KB1GVR>APU25N,RS0ISS-3* Port=1 <UI R Len=15>:
hello francois
 
The Packet APRS system is back on line

I managed to get 5 minutes of packet data today from the ISS as it passed by South Jersey. They are back online, here are a sample of the messages:
1-19-2010
18:35:03R RS0ISS-4>CQ,SGATE Port=1 <UI R Len=51>:
>ARISS - International Space Station (BBS/APRS on)
18:35:05R K4IPH>CQ,RS0ISS-4* Port=1 <UI R Len=44>:
=4035.60N/07934.40W--Bob in Vandergrift, PA
18:35:12R KC2PCR>APRS,RS0ISS-4* Port=1 <UI Len=20>:
:VE2KDK :Hya Mario
18:35:16R KB1GVR>APU25N,RS0ISS-4* Port=1 <UI R Len=22>:
:KC2PCR :hi doug{23
18:35:18R KB1GVR>APU25N,RS0ISS-4* Port=1 <UI R Len=24>:
:VE2KDK :hello agn{26
18:35:20R KC2PCR>APRS,RS0ISS-4* Port=1 <UI Len=16>:
:KB1GVR :ack23
18:35:30R N1RCW-6>APRS,RS0ISS-4* Port=1 <UI Len=62>:
=4140.40N/07030.22W`Hello! Via the ISS Space Station! {UISS52}
18:35:44R K4IPH>CQ,RS0ISS-4* Port=1 <UI R Len=44>:
=4035.60N/07934.40W--Bob in Vandergrift, PA
18:35:51R K1WDR-7>TQ3R8T,RS0ISS-4* Port=1 <UI R Len=37>:
`d]Kl"}j/]"49}Wayne,K1WDR,Norwich,CT
18:36:00R N1RCW-6>APRS,RS0ISS-4* Port=1 <UI Len=62>:
=4140.40N/07030.22W`Hello! Via the ISS Space Station! {UISS52}
18:36:02R KC2PCR>APRS,RS0ISS-4* Port=1 <UI Len=22>:
:VE2KDK :Hello Mario
18:36:04R K4IPH>CQ,RS0ISS-4* Port=1 <UI R Len=44>:
=4035.60N/07934.40W--Bob in Vandergrift, PA
18:36:21R VA2RF>APRS,RS0ISS-4* Port=1 <UI Len=54>:
=4606.15N/07030.28Wy.- 73' Michel - <FN46rc> {UISS33}
18:36:54R KC2PCR>APRS,RS0ISS-4* Port=1 <UI Len=16>:
73 all de kc2pcr
18:37:03R RS0ISS-4>CQ,SGATE Port=1 <UI R Len=51>:
>ARISS - International Space Station (BBS/APRS on)
18:37:11R KB1GVR>APU25N,RS0ISS-4* Port=1 <UI R Len=31>:
=4435.75N/06812.36W-FN54 Maine
18:37:36R K1CKK-6>APRS,RS0ISS-4* Port=1 <UI Len=54>:
=4145.08N/07003.93W- Carl Bewster Ma FN41xs {UISS52}
 
More sighting opportunities in the coming week for my area... This time, in the evening just following sunset...
If you have a scanner the frequency for packets is 145.825, you can hear and see the space ship. The voice frequency is 145.800. I only heard the voice channel once in the two years that I have been monitoring. You would most likely hear the packet mode, which right now is in the on mode.
 
Reminds me of back in 1983, was on my way to Detroit to take the Advanced Amateur Radio License test. Was between Toledo and Detroit and remembered that the first Amateur Radio station from space might be passing over. I tuned the 2 meter rig to the frequency he was to be on and shortly after heard Owen Garriott - W5LFL. Was a thrill for me and the three friends with me going along to upgrade from Novice. Been a while
since I tried listening for the packet signals. Thanks for the reminder.
 
Nine minutes? Wow! I think the longest window I've seen here has been about 5 minutes. Did you view from Cyprus or Michigan?
 
Think they have made some antenna changes on the ISS packet/APRS station so the system might not be fully functional or intermittent. I worked them on voice two years ago at night, talked to one of the Russian fellows for a few minutes.

The packet/APRS downlink is shared with other amateur radio satellites to you will often hear digital signals there.

Some of the schools use the VHF voice uplink and downlink so if you leave the downlink frequency in your scanners you should hear an event eventually. There is website at NASA that shows upcoming school schedules.

Must be a lot of hams on this site!

-C.
 
Not a ham freq, but as I type, I'm listening to the ISS on 143.625 . It's sort of a semi-private freq that they use to talk to family/friends/co-workers on the ground.
Thought it might be of interest to some.
 
Not a ham freq, but as I type, I'm listening to the ISS on 143.625 . It's sort of a semi-private freq that they use to talk to family/friends/co-workers on the ground.
Thought it might be of interest to some.
Thanks for the info BJ, There was a very good pass reception wise today around eleven EST, but the APRS packets were not turned on. I just checked the time of your post and it was it the pass window. I am going to put that frequency into my scanner, I will heading down to FL, I'll see if I can copy any passes from down there.
Mike Lib
 
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