APT Image Problem

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marksroberson

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I Have tried to receive the NOAA APT satellites on the 136-137 MHz range but i can never see the picture (its attached) i use MultiPSK and use a TYT TH-9800 Quad band radio can anyone help!
 

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ka3jjz

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There's no pic...

This message has nothing to do with HF; moved...please watch what forums cover what subject.

Mike
 

rbm

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I'm not familiar with the specs. of your receiver, however ......
The APT bandwidth is 34 kHz.

I usually use 38 kHz for SDRSharp to allow for some doppler shift.

If you can tell that you have a strong signal, then the bandwidth may be your problem.
But, it looks to me like you have BOTH problems. A weak signal AND a bandwidth that is too narrow.

Rich

NOAA-18 APT reception and settings.



Edit: Here's what the processed image looks like.

 
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cmeyer18

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What can I use to get the picture then?
If you don't already have a radio with that bandwidth, then the best thing you can do is get a rtl-sdr dongle and use that along with a decent antenna and SDR#.

I HIGHLY suggest reading through this quick start guide if you do plan on going this route. You can get the sdr itself for around $20 and any adapters you might need for a few more dollars. The rtl dongle uses a MCX connector (or a PAL connector on less common ones) and there are plenty of adapters to almost any other connector type. There are also some great tutorials on how to use it on that same site, and the community on Reddit is very helpful as well.

One of my favorite things to do with the rtl-sdr, besides weather images and ISS SSTV, is tracking aircraft. Plug the rtl in, run a program and I get the ADS-B packets from planes and can plot them on a map.
 
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