PRN     => 16   # PRN ID of the satellite 
 
                # 1-63 are GNSS satellites
                # 64-96 are GLONASS satellites
                # 100-164 are SBAS satellites
 
ss      => 20   # signal strength (dB)
az      => 161  # azimuth (degrees from true north)
used    => 1    # currently being used in calculations
el      => 88   # elevation in degrees