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Russian Meteor M-2 Weather Satellite Frequency(s)

AB9NN

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#1
When I read Technical details for satellite METEOR M2 I see TWO downlink frequencies: "Downlink (MHz): 137.100/137.900 "
I want to decode images using SDR#, Orbitron, M2_LRPT_Decoder, etc. Which frequency should I use? I reside in the US if that makes a difference.
I have tried 137.900 and got a short last section of a transmission but it would not save to a J-PEG, or I could not find where it save to,
when I used M2_LRPT_Decoder. I did get three strips of what looked to be good audio recording and did get what looked to be a good image,
It just would not save to a J-PEG.
 

ab5r

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#2
You might check farther on the Russian WX Sats. I am not positive (1) they are operational over the US and (2) that they use APT as do the US birds. I have a WeSaCom APT-06 dedicate receiver for the US birds, but haven't tried any others. What software are you using to decode?
 

AB9NN

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#4
You might check farther on the Russian WX Sats. I am not positive (1) they are operational over the US and (2) that they use APT as do the US birds. I have a WeSaCom APT-06 dedicate receiver for the US birds, but haven't tried any others. What software are you using to decode?
Seems to be quite popular - I am using my version of this:
Meteor-M2
AMIGOS
 

AB9NN

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#8
See my print-screen above... seems to be a signal and I seem to have gotten an image. Back to the original question. Not sure why two freq's are listed...
 

ab5r

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#9
I also believe that LRPT is DIGITAL too. Your software may decode! I have no idea why TWO frequencies? Look good.
 

AB9NN

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#11
I also believe that LRPT is DIGITAL too. Your software may decode! I have no idea why TWO frequencies? Look good.
The transmission is digital. QPSK. Symbol rate = 72,000 from what I have read. The software I use does decode the digital signal into a file that is saved. The file, then, is analyzed and converted into a form that can be saved as an image J-Peg or Bmp as I vaguely understand it. I have seen in another article images of US weather via Russian weather satellites. I find it hard to believe that they would NOT want to keep an eye on our weather as we would theirs. Unless there is some space treaty but I am very sure we each have spy satellites so I would think anything that has potentially more positive spin to it would be acceptable to any space agreements. But I'm not sure...
 

AB9NN

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#12
Id like to find out meteor is active having recently decoded a few noaa image's. I'll be watching.
Get Orbitron (free) and select Meteor M-2 satellite. Update Keplarian elements. Free. Then watch as it passes and monitor your waterfall at 137.900 and you will see what I am seeing.
 

AB9NN

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#13
Id like to find out meteor is active having recently decoded a few noaa image's. I'll be watching.
Haha haha.... so here is an image that I was able to decode yesterday. I think that is the Pacific Ocean in the lower left corner. Without a match to a map it is hard to tell with the amount of clouds and such. It took me a few minutes to tell if the software was actually saving the image to a J-Peg or not. Turns out it did without saying anything and dropped it into the audio recordings file. Fine as long as I know where it is...

2019_04_02_LRPT_12-33-40.s-ch2-rectified.jpg
 
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#14
I haven't been using pass prediction software. I just simply leave sdr# open at the end of the air voice band and watch. 137.9 is right in the range of the older noaa birds, so I will see it if it there eventually. The decoding is what will be new.

Great image. I had the impression meteor image's were glossy color prints however. Lol
 

AB9NN

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#15
I haven't been using pass prediction software. I just simply leave sdr# open at the end of the air voice band and watch. 137.9 is right in the range of the older noaa birds, so I will see it if it there eventually. The decoding is what will be new.
Great image. I had the impression meteor image's were glossy color prints however. Lol
Thanks. First trial! I had seen stunningly sharp images from Europe and it got me thinking. Not sure what equipment, software, antennas, radios, etc they are using. Mine is ultra-low-end gear using what I've got out of curiosity. You can always track them here:
Technical details for satellite METEOR M2

I think there might be a notifications capability in there somewhere as well. Requires an Internet connection however. I use it to confirm the accuracy of other trackers. To find the link for other birds just do some search in Google or others like, "track NOAA-19" for NOAA-19 without the quotes.
 
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#16
Im using an RTL_SDR--> 30' USB Cable --> 20' RG8x --> Discone with 11 meter element. Works for me.

Using WxtoImg I know there is an automatic feature for a given channel. Ive been using the manual button however.

This one is from yesterday;


. screenshot.17.jpg
 
Last edited:

AB9NN

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#17
Im using an RTL_SDR--> 30' USB Cable --> 20' RG8x --> Discone with 11 meter element. Works for me.
Using WxtoImg I know there is an automatic feature for a given channel. Ive been using the manual button however.
This one is from yesterday.
Thanks. Nice capture! For the Satellite menu option on WxToImg what selection had you made?
 
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