Is there any possibility to monitor daily transmissions between nasa and the iss? what frequencies are used, etc?
If you are in Europe you might try the VHF1 channel on 143.625 FM.
What you will eventually hear there is the downlink. To copy the uplink (139.208) you must be in the Moskow area.
During spacewalks you can try tuning on 121.750 and 130.167.
That's all my experience can suggest because other systems rely on microwaves and contains encrypted stuff.
Now how about the rest of the world????
(US, UK, ECT. ECT. ECT.)
I didn't think there was any 'CLEAR' channels used so I never asked.
Hi guys, I just wondered what sort of times/days the ISS transmitted ?
The reason i ask is because sometimes i can hear it when im within it's radio footprint and other times i can't, so is it a case of they only transmit on certain days ?
Hello. ISS transmits almost everyday. You can check latest status reports on this website on the main page.
Are you tracking the station or are you listening at random times?
Im using WXTrack to track the ISS so i know when it's within range, however, being in the UK makes it difficult to listen as the ISS passes as the most inconvenient hours of the morning. What i tend to do is leave my reciever switched on monitoring 145.800Mhz for packet but for the past week i've had just 2 lines of packet data.
[quote:487a41bef6="Prometheus"]Im using WXTrack to track the ISS so i know when it's within range, however, being in the UK makes it difficult to listen as the ISS passes as the most inconvenient hours of the morning. What i tend to do is leave my reciever switched on monitoring 145.800Mhz for packet but for the past week i've had just 2 lines of packet data.
ISS passes generally shift about one our earlier each day. Just wait a couple of weeks and you will have passes at better times.
What kind of antenna are you using? You are supposed to copy a few dozen lines of data at least.
At home i use a crossed dipole, admittedley designed for Polar APT WX satellite receiption, however it does pick up the ISS. The setup at the works QTH is more spot on, being a Diamond X co-linear 2m/70cm vertical up at about 20 meters but so far this week i have still failed to receive any packet data if i leave the radio switched on at work.
Your setup is good. You probably have tried in the wrong week.
As you see in the status window the packet is not active. Just try when you see it up and running...
Im away this weekend but i've left my receiver running so hopefully i'll get home to some data.
Many thanks for your help
These 2 sites have frequecy information for NASA.
Monitoring Times Frequency List