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ReceiverStatus.md

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As of version 0.2.6, a complete receiver status message looks as follows:

LKHS>APRS,TCPIP*,qAC,GLIDERN2:>211635h v0.2.6.ARM CPU:0.2 RAM:777.7/972.2MB NTP:3.1ms/-3.8ppm 4.902V 0.583A +33.6C 14/16Acfts[1h] RF:+62-0.8ppm/+33.66dB/+19.4dB@10km[112619]/+25.0dB@10km[8/15]

The first group is standard APRS:

LKHS>APRS,TCPIP*,qAC,GLIDERN2:>211635h
  • 'LKHS>': origin
    • 'LKHS': receiver callsign
  • 'APRS,TCPIP*,qAC,GLIDERN2:': source
    • 'APRS': software version (always "APRS")
    • 'TCPIP*': tunneling (always "TCPIP*")
    • 'qAC': q construct (not suited for beacon identifcation)
    • 'GLIDERN2': receiver callsign (APRS server)
  • '/': either "/" (timestamp and position follow) or ">" (timestamp follows)
  • '211635h': timestamp in 24h notation UTC (21 hours, 16 minutes, 35 seconds)

All subsequent groups are OGN specific receiver status details:

v0.2.6.ARM CPU:0.2 RAM:777.7/972.2MB NTP:3.1ms/-3.8ppm 4.902V 0.583A +33.6C 14/16Acfts[1h] RF:+62-0.8ppm/+33.66dB/+19.4dB@10km[112619]/+25.0dB@10km[8/15]
  • 'v0.2.6.ARM': optional software and hardware
    • '0.2.6': software version
    • 'ARM': optional hardware platform
  • 'CPU:0.2': CPU
    • '0.2': load average
  • 'RAM:777.7/972.2MB': memory in MB
    • '777.7': free
    • '972.2': total
  • 'NTP:3.1ms/-3.8ppm': real-time clock
    • '3.1ms': offset from reference time
    • '-3.8ppm': correction (parts-per-million)
  • '4.902V': optional board voltage
  • '0.583A': optional board amperage
  • '+33.6C': optional CPU temperature
  • '14/16Acfts[1h]': optional senders (aircraft) received within the last hour
    • '14': visible senders received
    • '16': total senders received (the difference of 2 are invisible senders by setting either "no-track" on the device or "invisible" in the database)
  • '+62-0.8ppm/+33.66dB': optional RTLSDR information
    • '+62': optional manual correction
    • '-0.8ppm': optional automatic correction based on GSM
    • '+33.66db': signal-to-noise ratio
  • '+19.4dB@10km[112619]': optional quality of all senders (aircraft)
    • '+19.4dB@10km': average signal-to-noise ratio normalized to 10km distance
    • '112619': number of analyzed messages
  • '+25.0dB@10km[8/15]': optional quality of good senders (aircraft) within the last 24 hours
    • '+25.0dB@10km': average signal-to-noise ratio normalized to 10km distance
    • '8': number of senders which are considered good and properly transmitting
    • '15': total number of senders (the difference of 7 are considered bad and not properly transmitting)