Struggling with automatic Meteor-M LRPT demodulation

SatNOGS Software
56

inspired by all posting on this thread, i’m trying recode meteor.sh but now with satdump as the decoder.

this work flawless on latest satnogs-client docker (version 2.1.1) (running on raspberry with satnogs manual docker installation)

the result can be check on this obs

image
image1568×960 382 KB

Step by step:

open console, and enter into your satnogs docker directory
for example:
cd ~/station-4330

create directory app
mkdir app

edit docker-compose.yml
nano docker-compose.yml

Look at the line that contains:

    volumes:
      - type: 'tmpfs'
        target: '/tmp'

Then copy and paste the following text right below it:

      - type: 'bind'
        source: './app'
        target: '/app'

edit station.env:
nano station.env

find the following variable and change its value to: (if it doesn’t exist yet, add it)

SATNOGS_POST_OBSERVATION_SCRIPT=/app/satnogs-post {{ID}} {{FREQ}} {{TLE}} {{TIMESTAMP}} {{BAUD}} {{SCRIPT_NAME}}
METEOR_NORAD=57166 59051

ENABLE_IQ_DUMP=true
IQ_DUMP_FILENAME=/tmp/.satnogs/iq.raw

go to app dir:
cd app

create satnogs-post script:
nano satnogs-post

copy paste this 
#!/bin/bash
# SATNOGS_POST_OBSERVATION_SCRIPT="/app/satnogs-post {{ID}} {{FREQ}} {{TLE}} {{TIMESTAMP}} {{BAUD}} {{SCRIPT_NAME}}"

/app/meteor.sh stop "$@"
/app/rename.sh stop "$@"

make it executable:
chmod 755 satnogs-post

create meteor.sh script
nano meteor.sh

copy paste this 
#!/bin/bash
# exit if pipeline fails or unset variables
set -eu

# default values
: "${METEOR_NORAD:=57166 59051}"
: "${SATNOGS_OUTPUT_PATH:=/tmp/.satnogs/data}"
: "${IQ_DUMP_FILENAME:=/tmp/.satnogs/iq.raw}"
: "${SATDUMP_APP_DIR:=/app/satdump}"

export LD_LIBRARY_PATH=$SATDUMP_APP_DIR

# Launch with: {command} {{ID}} {{FREQ}} {{TLE}} {{TIMESTAMP}} {{BAUD}} {{SCRIPT_NAME}}
# /app/satnogs-post 13665238 137900000 '{"tle0": "METEOR M2-3", "tle1": "1 57166U 23091A   26084.83747850 -.00000009  00000-0  14817-4 0  9997", "tle2": "2 57166  98.6179 141.4862 0004884  62.5359 297.6316 14.24039267142657"}' 2026-03-26T01:59:49 40000 satnogs_fsk.py

ID="$2"      # $2 observation ID
TLE="$4"     # $4 used tle's
DATE="$5"    # $5 timestamp Y-m-dTH-M-S
BAUD="$6"    # $6 baudrate

# Extract satellite name and NORAD
SATNAME=${TLE#*tle0\": \"}
SATNAME=${SATNAME%%\"*}
NORAD=${TLE#*tle2\": \"2 }
NORAD=${NORAD%% *}

echo "INFO: $ID, Norad: $NORAD, Sat: $SATNAME, Baud: $BAUD, TLE: $TLE" 

if [[ " $METEOR_NORAD " =~ .*\ ${NORAD}\ .* && "$ENABLE_IQ_DUMP" ]]; then
    rm -rf "${SATNOGS_OUTPUT_PATH}/meteor"
    mkdir -p "${SATNOGS_OUTPUT_PATH}/meteor"
    sleep 5
    cp $IQ_DUMP_FILENAME "${IQ_DUMP_FILENAME}.meteor"
    cd $SATDUMP_APP_DIR
    ./satdump meteor_m2-x_lrpt baseband "${IQ_DUMP_FILENAME}.meteor" "${SATNOGS_OUTPUT_PATH}"/meteor --samplerate 160000 --baseband_format s16 --fill_missing --max_fill_lines 100
fi

make it executable:
chmod 755 meteor.sh

create rename.sh:
nano rename.sh

copy paste this: 
#!/bin/bash
# exit if pipeline fails or unset variables
set -eu

# default values
: "${METEOR_NORAD:=57166 59051}"
: "${SATNOGS_OUTPUT_PATH:=/tmp/.satnogs/data}"

ID="$2"      # $2 observation ID
TLE="$4"     # $4 used tle's
DATE="$5"    # $5 timestamp Y-m-dTH-M-S

IMAGE="$SATNOGS_OUTPUT_PATH/data_${ID}"

SATNAME=${TLE#*tle0\": \"}
SATNAME=${SATNAME%%\"*}
NORAD=${TLE#*tle2\": \"2 }
NORAD=${NORAD%% *}

if [[ " ${METEOR_NORAD} " =~ .*\ ${NORAD}\ .* ]]; then
    echo "RENAME: $ID, Norad: $NORAD, Sat: $SATNAME"  
    cd "${SATNOGS_OUTPUT_PATH}/meteor/MSU-MR (Filled)"
    # Find all .png files and rename them
    for file in *.png; do
      if [ -f "$file" ]; then
        new_name="${IMAGE}_${file}"
        mv "$file" "$new_name"
        echo "$file → $new_name"
      fi
    done
fi

make it executable:
chmod 755 rename.sh

compile the satdump from source here, or you can download the satdump binary version that I’ve already compiled here (satdump v1.2.3-943de7df0)(sha256:db9368a4eb6cd42cc8824fb3ee400971550af7b3fb5d24a3537d50ff34c8d0aa)

wget https://github.com/hobisatelit/satnogs-addon/releases/download/meteor-v0.01/satdump.tar.gz

extract this:
tar zxvf satdump.tar.gz

restart the station:

cd ~/station-4330
sudo docker-compose down && sudo docker-compose up -d && sudo docker-compose logs -f

and.. finish! :partying_face:

just create a new meteor m2-3 or m2-4 observation

file:
satnogs-post.txt (182 Bytes)
meteor.sh.txt (1.4 KB)
rename.sh.txt (791 Bytes)

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