Meteor M N2-3

[ysamouhos]

I am trying different settings to OQPSK etc and I am using either rtl_fm or gnuradio but without luck.

Anyone had any success with new Meteor M2-3 ?

[ShianMull]

I’ve been trying similar. Meteor-M2 3 TLEs are now available in the updates downloaded, but even changing the schedule scripts does not seem to schedule M2 3 passes. I think there is some embedded references to ‘Meteor M2’ in the various components scripts etc of RaspberryNOAA that need the authors to have a look at.

Any of the code owners able to suggest if we can just modify scripts etc ourselves or the code needs an update?

Cheers

Mark

[ysamouhos]

Here are my changes in order to schedule and capture.

In scripts/schedule_captures.sh I changed "METEOR-M 2" to the correct name of N2-3 in TLE like bellow.

if [ "$OBJ_NAME" == "METEOR-M2 3" ]; then
  SAT_MIN_ELEV=$METEOR_M2_SAT_MIN_ELEV
fi

also in scripts/schedule.sh I did the following changes.

if [ "$METEOR_M2_SCHEDULE" == "true" ]; then
  log "Scheduling Meteor-M2 3 captures..." "INFO"
  $NOAA_HOME/scripts/schedule_captures.sh "METEOR-M2 3" "receive_meteor.sh" $TLE_OUTPUT $start_time_ms $end_time_ms >> $NOAA_LOG 2>&1
fi

and..

#  grep "METEOR-M 2" $WEATHER_TXT -A 2 >> $TLE_OUTPUT
  grep "METEOR-M2 3" $WEATHER_TXT -A 2 >> $TLE_OUTPUT

I hope this solves your issue.

[ShianMull]

Just an update that even with the right TLEs giving scheduling for Meteor-M2 3, the current Meteor configuration in RaspberryNOAA is not decoding the audio (it is a different resolution etc from Meteor-M 2 so probably not surprising). I hope you have success with the back to windows tests. I’ll have a look for where the decode parameters are set and try to match to Meteor-M2 3, unless anyone with intimate knowledge of the code can quickly update in the meantime?

[chrisd65]

In which line numbers did you insert the two lower line blocks? They're not there, so I'm guessing you added them? In which lines?

[ysamouhos]

Not sure I understand the question. Can you please elaborate a bit?

[Bill1716]

chrisd65 - Do you mean commands starting with grep? On line 75 (approximately).

[ysamouhos]

Find this line grep "METEOR-M 2" $WEATHER_TXT -A 2 >> $TLE_OUTPUT
and replace it with grep "METEOR-M2 3" $WEATHER_TXT -A 2 >> $TLE_OUTPUT

[overclock25]

I am trying different settings to OQPSK etc and I am using either rtl_fm or gnuradio but without luck.

Anyone had any success with new Meteor M2-3 ?

No unfortunately. Hope that somebody will publish the solution.

[ysamouhos]

Just an update here.

Based on this https://github.com/happysat/Meteor-M-N-2-3-Satellite-Operational-Status/blob/main/README.md

There were a number of switches and switchbacks on Freq and SymbolRate so one has to keep track of it because it's not yet production stable. It took me a lot of failed attempts to record before I find the changes that happened in last 15 days or so.

Now my next problem is that my QFH antenna does not give me a strong enough signal and also found (the hard way) that Nooelec NOAA+ LNA does not work with closed loop antennas so I was forced to remove the LNA (which btw has 2 filters, one on input and one on output which is very nice and very sad at the same time ) and work with only the gain of my RTL2838UHIDIR.

I will build a turnstile antenna and see if there is any better.