From: Bruce Maccabee <brumac.nul> Date: Sun, 28 Mar 2004 00:12:56 -0500 Fwd Date: Sun, 28 Mar 2004 15:55:57 -0500 Subject: Re: Phoenix Lights - Man Made Hoax Devices? - >From: Bill Hamilton <skyman22.nul> >To: UFO UpDates - Toronto <ufoupdates.nul> >Date: Sat, 27 Mar 2004 07:27:55 -0800 >Subject: Re: Phoenix Lights - Man Made Hoax Devices? >>From: Bruce Maccabee <brumac.nul> >>Date: Fri, 26 Mar 2004 14:54:00 -0500> >>To: <ufoupdates.nul> >>Subject: Re: Phoenix Lights - Man Made Hoax Devices? >>>>According to National Air Guard spokespeople in the summer of >>>>1997, the flares were released at an unusually high altitude. >>>>Capt. Eileen Benz, spokesperson for the Arizona National Guard, >>>>and the person who discovered that flares had been dropped that >>>evening by the Maryland National Guard (Snowbirds), flares were >>>dropped at an altitude of 15,000 ft. Capt. Drew Sullins, >>>>spokesman for the MD Nat. Guard. said a squad of A-10 using the >>>>Bary Goldwater training range had "dumped several flares" at >>>>high altitude. >>>Bruce, you fail to mention that at that altitude and distance, >>>these so-called perfectly round amber "flares" would be 1,500 >>>feet in diameter. >>I don't know what you mean by this. The flares are fixed in size >>by the metal tubes housing the fuel that is burned. Are you >>trying to say thatthe flares change their size with altitude? >I am saying that based on the angular displacement of the light >and its distance from my viewing point, and trig calculations >indicate it to be over 1,500 feet in diameter. Pretty large >flares. The size of the image of a bright light which is too small to resolve at some distance (e.g., a bright light bulb a few inches in diameter photographed at several miles... or a bright star) is a function of its brightness. The image size grows with brightness for various optical reasons. Astronomers use this fact to estimate star magnitude from te size of images on photographic plates (at least they used to). Hence one cannot simply project the size of the image of a distant light out to the distance of the light and thereby estimate the size of the light. In other words, your calculation of flare size from image size is incorrect. The mst it can give is an upper bound to the size of the light source (it could be any size smaller than the upper bound).
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