<div dir="ltr">It's great to see technology like this approaching for at least partial automated judging.<div><br></div><div><div>Seems that resolving the altitude component adequately is the largest challenge. To address this, I had envisioned a local set of 3 "beacons", each emitting GPS-like signals that are received and processed by a transponder in the model. Yeah - expensive and even more out in the future.</div><div><br></div><div>In the short term, using high resolution and update GPS to resolve XY location might be useful for partial judging. Human judges would still be responsible for the majority of the scoring, but a "correction factor" for XY errors might be factored in. For instance, it is terribly hard to judge the geometry of the horizontal triangle in F15, but given good XY data, a portion of the score could be addressed. Distance and parallelism to the runway could also be determined and factored in (somehow).</div><div><br></div><div>Dan</div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, May 8, 2015 at 9:33 PM, John Gayer via NSRCA-discussion <span dir="ltr"><<a href="mailto:nsrca-discussion@lists.nsrca.org" target="_blank">nsrca-discussion@lists.nsrca.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#3333FF">
The judges are expected to consider the track of the plane in an
earth coordinate system. For example the judges are supposed to
consider that a 45 degree climb appears steeper at the end of the
box than it does in the center. So the track should be analyzed by
the judges in an earth coordinate system and the track of the model
rather than attitude. <br>
<br>
The location of the pilot is actually irrelevant but the location of
the box is clearly of critical importance. Knowing the actual
location of the plane with a fairly quick update rate is critical.
At 120 feet/sec(approx 80 mph), horizontal position is no problem.
At this speed you need an update rate of about 80 milliseconds to
get a data point about every 10 feet. Not sure how good the GPS
update rates are these days but this should be achievable. IF the
altitude update rate is too slow then augment with an altimeter.
Since we are downloading this data from the model, roll attitude
could be transmitted as well for wings level.<br>
<br>
We would still need a zero judge for snaps, spins and stall turns
and to establish when the pilot is lost in a maneuver. It might be
necessary to have an "advance to the next maneuver" switch for that
case.<br>
<br>
It would actually be a fascinating project to download
accelerations, roll, yaw and pitch rates for analysis while
observing snaps visually to see if standards could be established
about what is a snap and what isn't.<br>
<br>
John<br>
<br>
<div>On 5/8/2015 1:24 PM, Peter Vogel via
NSRCA-discussion wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Not by itself. Judging/Scoring is from the
perspective of the pilot + judges, not from the perspective of
the plane. (As opposed to IAC, where it's from the perspective
of the pilot in the plane). For it to be done right you'd need
to know the precise location of the plane and the precise
location of the pilot, then calculate the geometry of the
plane's movements relative to the perspective of the pilot's
location.
<div><br>
</div>
<div>The SoloShot 2 automatic cameraman does close to what we
want in tracking the movement of the plane relative to a
ground station, but from that you'd still need to calculate
geometries, and wings level, etc.</div>
<div><br>
</div>
<div>Peter+</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Fri, May 8, 2015 at 11:44 AM, Keith
Hoard via NSRCA-discussion <span dir="ltr"><<a href="mailto:nsrca-discussion@lists.nsrca.org" target="_blank">nsrca-discussion@lists.nsrca.org</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div link="#0563C1" vlink="#954F72" lang="EN-US">
<div>
<p class="MsoNormal"><span style="font-size:14.0pt">Cheap,
<a href="http://goo.gl/mZg6RG" target="_blank">Centimeter
accuracy GPS</a>.</span></p>
<p class="MsoNormal"><span style="font-size:14.0pt"> </span></p>
<p class="MsoNormal"><span style="font-size:14.0pt">No
more complaints about biased judging?</span></p>
<p class="MsoNormal"><span style="font-size:14.0pt"> </span></p>
<p class="MsoNormal"><span style="font-size:14.0pt">-Keith
Hoard</span></p>
<p class="MsoNormal"><span style="font-size:14.0pt"><a href="mailto:klhoard@hotmail.com" target="_blank">klhoard@hotmail.com</a></span></p>
<p class="MsoNormal"> </p>
</div>
</div>
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