SatelliteObserver

Software for capturing signal from satellites. The satellite is identified by Catalog Number.

Instalation

Dependencies

• Boost

• Pymlab library

• GNURadio 3.7.5 or higher: http://gnuradio.org/redmine/projects/gnuradio/wiki/BuildGuide

How to: NOAA decoder block

• Download the source.
• Go to /sat-observer/gr-sat_observer:

    cd /your_download_directory/sat-observer/gr-sat_observer  

• Make the build directory:

    mkdir build

• Build the project:

    cd /build
    cmake ..

• Install:

    sudo make install

How to: satellite-observer

    git clone https://github.com/MLAB-project/satellite-observer.git
    cd satellite-observer  

• Make the build directory:

    mkdir build

• Build the project:

    cd ./build
    cmake ..

• Install:

    make install

• You have the executable in:

    cd ../install

Usage

###Configuration

SpaceTrack account

If you want to automatically download the TLE file you need an account on Space-Track:

• https://www.space-track.org/auth/createAccount

Server configuration file

You must edit the configuration file /sat-observer/install/default.ini

A configuration file example (you must fill all):

        [mlab]
        
        [CONNECTION]
        Port = 30030

        [TLE]
        #FileSource=server
        FileSource = server            
        #Server=spacetrack
        Server = spacetrack
        #DIRECTORY whre will saved the TLE files
        Local_path = /home/odroid/Bolidozor/TLE
        
        [SPACETRACK]
        #You space-track user
        User = [email protected]
        Pass = password
        
        
        [POSITION]
        Lat = 49.2607
        Long = 14.6915
        Hight = 0
        
        [TIME]
        #The timezone of YOUR OPERATIVE SYSTEM
        Hour = +2
        
        [CAPTURE]
        #+- start and end of the capture (in second)
        Start = -30
        End = +30
        #Audio hardware
        Hardware = hw:1,0
        #Where the capture file (directory) will be save
        Directory = /home/odroid/Bolidozor/samples
        Frequency = 145.98

• FileSource
  • server
  • local: not supported.
• Server
  • Only avaiable SpaceTrack.
• LocalPath
  • Where the TLE file will be download (/DIRECTORY)
• User
  • Your SpaceTrack user.
• Password
  • Your SpaceTrack pass.
• Lat:
  • Latitude of station.
• Long:
  • Longitude of the receiver station.
• Hight:
  • Hight of station.
• Hour:

  • Your time zone (of your receiver system). For example, if you are in Spain in summer your time zone is: UTC/TMT +2. Then:

      Hour = +2
    

Running Satellite Observer

Server

• Go to the install directory:

        cd /you_download_directory/sat-observer/install

• Open a terminal and execute the program:

      ./server
  

• Open other terminal and execute the frequency script (receiver port as an argument):

      python ./frequency.py 1
  

Client

• Go to the install directory:

        cd /you_download_directory/sat-observer/install

• Open other terminal and execute client: ./client IP Port Satellite_number frequency 137.1

      ./client 127.0.0.1 30000 33591 137.1
  

NOAA decoder block

Satellite Observer demodulates and decodes the signal of NOAA Satellite automatically. But you can do it manually with the script: ./decoder.py

• Go to the install directory:

        cd /you_download_directory/sat-observer/install

• Open other terminal and execute the script:

      python ./decoder.py /home/carlos/signalIn.wav /home/carlos/signalOut.wav
  

*** SignalIn format is: wav file, sample rate 48000, 2 channels, 32 bits.