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<div class="moz-cite-prefix">I believe I have read everything that
is locatable about APRS specs and do not recall ever having seen
these special speed values anywhere.<br>
<br>
My question is: Why bother? When things are going that fast,
they're probably beaconing at a reasonable rate and the
speed/heading can be calculated between two adjacent beacons. At
least satellites (and I hope the Concord) don't turn that quickly.<br>
<br>
Or are we trying to do APRS tracking of fighter jets in a live
dogfight?<br>
<br>
Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and
Win32
<br>
<br>
On 10/11/2017 8:48 AM, Robert Bruninga wrote:<br>
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<p class="MsoNormal">Authors,</p>
<p class="MsoNormal">I thought that I had years ago declared
that a speed of 999 would mean Orbital Velocity 17,500 MPH and
that 998 would mean something else for high speed jets. Maybe
mach 3?</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Actually I may have defined three speeds
greater than 999 for the last three enetries.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Clearly we need orbital velocity for the
Space station, etc…</p>
<p class="MsoNormal">And Mach 3 for our fighter pilots…</p>
<p class="MsoNormal">And something for the Concord (or its
replacement)…</p>
<p class="MsoNormal">What about Elon Musk’s hypter tube? But I
think it is under 999…</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Anyway, is this written down anywhere?</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">And if not, then here is what I propose:</p>
<p class="MsoNormal">999 = 17500 MPH space station</p>
<p class="MsoNormal">998 = 1850 MPH military</p>
<p class="MsoNormal">997 = 1350 MPH concord</p>
<p class="MsoNormal">996 = 996 MPH</p>
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