Float Flyr
Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland
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 Posted: Wed Feb 21, 2007 6:02 pm Post subject: Off Topic GPS info |
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Not on the highway I was driving on??? LOL
In less than a minute the location on the GPS map moved almost 60 plus miles
while I was stopped. I have seen dithering in the GPS many times ... A few
feet left or right not 60 + miles. I only saw it once on one particular
receiver which I admit was much slower than my newer Marine. Sure like
everybody else I have used the GPS in the plane with very good results..
Checking groundspeed Etc. I have even just for the fun of it flown a circuit
that I put into the receiver through the mapsend on the computer. All the
turns were right over the chosen land marks.
Telling altitude here isn't hard... Most of the time our tides are a couple
of feet above mean sea level and the house here is about 20' give or take
above high flood tide. Right now the tide is plus five feet above mean sea
level.
I just had to go out and get the GPS and see what altitude it gave me.
There are four satellites almost directly overhead and several more near the
horizon. The altitude reading was 12 meters. That's a hair over 39 feet.
My altitude (gestimation) is around 20 ft. so the altitude is out by 19
ft... Good enough for government work! Generally it reports the altitude
around 7 meters which is not too bad. BUT.... There have been occasions,
especially when the satellites are all close to the horizon that the
altitude has been out by close to a hundred feet. As long as I don't see
the water rushing in the door it's ok. Come to think of it flying VFR it
really doesn't bother me. The one flight instrument I wouldn't want to be
without is the ASI.
BTW tonight, when I turned on the GPS my speed started at 548kph then went
to 532 kph then all the way down to 428kph and at that point something
computed and it went to 0kph until is started walking.
It's a beautiful night. The temperature is just above freezing, there isn't
a cloud in the sky and not enough wind to blow out a match. Not a sound in
the forest behind the house. The nearest town is almost ten miles away so
the sky is absolutely breathtaking or to coin another word "Awesome"!
The Bay of Exploits, a shade more than 50 feet away, is pretty much a
shallow bay with many islands. A tsunami would probably break up thirty
miles out the bay. I say probably because as far as I know there has never
been a tsunami here at least in recorded history. If I get one minutes
notice I can make it to the top of a three hundred foot high hill... Problem
is they usually don't give notice.
I marked this post Off Topic because I didn't mention my ------ once.
Oh yes, let's try a Do Not Archive statement in this one too.
Noel
------ mod III-A, 582 "B" box
Sorry for the rambling...
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_________________
Noel Loveys
Kitfox III-A
Aerocet 1100 Floats |
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