200000' shot with an edm?
Does anyone know what the record is??ÿ I know they had a prism on summit for the 1992 measurement of Everest. No idea if they actually got a measurement on it, but that had to have been a long measurement as well.
200000' shot with an edm?
Does anyone know what the record is??ÿ I know they had a prism on summit for the 1992 measurement of Everest. No idea if they actually got a measurement on it, but that had to have been a long measurement as well.
I'm pretty sure that the "record" would be the 238,900 MILES when they periodically measure to the reflectors that the Apollo boys left on the Moon. I don't know offhand what the terrestrial record is, but I'm sure that it is much more than 200,000 feet.
Loyal?ÿ
@dmyhill?ÿ ?ÿBouncing RADAR signal off Venus in the 1960's they measured?ÿ it was 45,000,000 meters away +/-
For the Survey of the McDonald Observatory NGS measured a slope distance of 92882.041 meters +/-. Paper came out in 1978. This measurement was made with a modified Model 4 Geodimeter with a Laser in it (called Big Red).
In 1970's Great Britain measured from Wales to Republic of Ireland 136,560.213 meters with a MRA 2 Tellurometer that had a special 1.2 meter reflector on the front.
And of course what Loyal said above about measuring to the Moon.
JOHN NOLTON
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John, I think you misplaced a decimal point or so on the Distance to Venus. At its closest approach, Venus is about 61,000,000 Kilometres from Earth.?ÿ
BTW, one of the Saloons in town was closed yesterday (and today) for new flooring, it has screwed up the Geezer (dead pecker) Club Meetings!?ÿ
@loyal?ÿ ?ÿYes I left off the "km" behind the distance of 45,000,000?ÿkm (not 45,000,000 meters). Of course that depends on where Venus and Earth are in their orbits.
I have the printed report (someplace) and the more I think about it this might of took place in 1957. I will check on it when I get well.
Sorry about the bars being closed. One must have a touch of the good stuff once in a while!
Thanks very much for correcting my gross error.
JOHN
From some old correspondence. I was not involved in the survey.
Some info on Big Red and photo of a setup during the McDonald Observatory survey??
93 retro-reflectors, T3 and heliotrope?ÿ
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@geeoddmike?ÿ ?ÿWe can see immediately that there is 2 errors on the Spec. sheet for "Big Red"
1. Big Red never measured 102 miles. I think that the ~ 93 Km at McDonald Obs. was the longest (personal communications with Charlie Glover, who was the man who taught me how to run "Big Red".
2.Under accuracy;?ÿ the ppm is listed as 1 part in 10,000,000?ÿ that should be 1 part in 1,000,000
JOHN NOLTON
you might like this one. See the caption??
?ÿ
Bouncing RADAR
I don't recall ever being bounced off of anything; but then I my have been drunk...
@dougie?ÿ Outstanding! I think I might have been there once or twice myself.
@geeoddmike?ÿ Thanks. I only wish I had more pictures of Charlie and me. We were calibrating Big Red; I was running the inst., Charlie was moving the prism on a special bar and recording,?ÿ Wes Odem (another NGS employee and good friend)was supervising me and we all had a lot of fun talking; great time.
JOHN NOLTON