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APRS OK Information Explanation...

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  • Lynn W. Deffenbaugh
    Oh, one other thing. APRSISCE puts a line of text below the APRS OK line that shows the pressure to transmit an updated position. Can you tell me what your s
    Message 1 of 1 , Jan 8, 2010
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      Oh, one other thing. APRSISCE puts a line of text below the "APRS OK"
      line that shows the pressure to transmit an updated position. Can you
      tell me what your's is saying? It will be something like:

      Dist nn% - Traveled Percentage of Max Distance
      Fore nn% - Forecasted Percentage of Max Distance
      Proj nn% - Percentage of Forecast Error
      Head nn% - Percentage of Heading Change
      Time hh:mm:ss - Count down from Max Time
      STOP - Stopped having been moving
      START - Started having been stopped
      FORCE - Clicked the Transmit button
      LostFix - GPS Lost a Fix
      GotFix - GPS Acquired a Fix

      It DOES say "APRS OK", right? If not, then you're having trouble getting
      connected to an APRS-IS server.

      There are also three colored bars below that text that indicate (top to
      bottom):

      Transmit Pressure increasing left to right (Transmits when it gets to
      the right, see also last line)
      APRS-IS Quiet Time - Increasing left to right, reconnects if it ever
      gets to the right
      Transmit Throttle decreasing right to left (Counts down Min Time after
      beacon)

      These bars aren't very wide, but the normal behavior is that the top one
      will crawl to the right and a beacon will be sent when it hits the right
      edge. At that time, the bottom bar will jump immediately to the right
      and start shrinking to the left as the Min Time elapses.

      The center bar will grow from the left until a new packet is received
      from APRS-IS. If it ever gets to the right edge (set by Quiet Time which
      should be 60 seconds), the APRS-IS connection is dropped and a new
      connection is established. APRS-IS servers send out a heartbeat every
      20-30 seconds if no packet has been sent, so this bar should just hover
      in the left half of the display, growing longer and then disappearing
      only to start over. If your filter has lots of stations coming in, you
      might never actually see this bar (although you station list will be
      scrolling fast!).

      Lynn (D) - KJ4ERJ

      PS. I had sent this privately to DL1UL but decided that the whole group
      might benefit from an explanation of these visual indicators.
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