APRS OK Information Explanation...


Lynn 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 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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