Satellite APRS on D700 [Archive] - Glock Talk

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lomfs24
10-12-2005, 11:33
Hello everyone.
I have a lot of questions about APRS via satellite. I know very little about it right now so I will probably use a lot of wrong terminology so please bear with me. From what I understand, there are birds up there that simply act as digi's. As you might expect, they are not always avaiable for you to use.
Questions section
1. I am running a D700 mobile and am wondering about antenna's. I currently have a mobile dual band antenna. That is, of course, vertically polarized. Can I communicate with satellites with this type antenna? I know that during field day this year went they were doing voice ops through satellite they were using a yagi type antenna. Do you have to have a special antenna to communicate through a satellite?
2. What is the best way to pick the "bird" you want to use? It seems there are several to choose from. And what is the best way to track that bird so that you know you are getting into it?
3. What are your settings to make your D700 work APRS through a satellite?
In short, I am looking for some elmering on this topic.

Thanks for anyhelp.

martho
10-12-2005, 18:52
I would start with www.amsat.org

You can work the sats with any antenna, however circular polarization is usually best. If you have a FM radio, take a listen to AO-51 when it is in voice mode. It is pretty easy to hear although difficult to work.

If you dont have a sat tracking program, I would start with Orbitron as it is the most user friendly and it has a nice display. The keps can be updated easily within the application.

lomfs24
10-13-2005, 16:04
martho, thanks for the suggestions. I am not really looking to do voice through satellite just yet but that will be the next step. Seems that I have pretty much conquered the APRS through satellite last night. I made a couple contacts through the ISS via APRS. I got a message from a guy in the Gulf of Mexico (gulf de mexico) on from kentucky, one from IA and a couple more that I can't remember right off the top of my head.

I think I am going to try one of the other birds for APRS then I will probably move on to voice. Are there any satellites that are FM voice on 2 meter both up and down? Doppler shift seems to be less of a problem on 2 meters than it does on 70cm.

Thanks again.

martho
10-14-2005, 08:36
All of the bird info is on the AMSAT site. You are not going to find any same band up/down birds.