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AZTraveller Master Cartographer Reged: 07/15/05 Posts: 1388 Loc: Arizona Re: Imaging artifacts in budapest?       07/29/05 05:12 PM Edit   Reply   Quote   Quick Reply   When a highly refelective surface on the ground aligns with the satellite camera it creates the equivalent of lens flare. This particular satellite uses a linear CCD that is at right angles to its dirction of travel (North to South). It is traveling at 6.8 kilometers per second with one image pixel equal to 0.83 meters on the ground. With a 10 meter focal length the exposure is would be too short so they employ a 16 x 12,000 pixel array. And take 16 image strips one after the other and delay the first image by 16 lines the next by 15 etc until the last line then the add all of the images together which increases the exposure by 16 times . This is called TDI (time delayed Integration) When a ground object reflects back the suns image it over loads the CCD progressively producing a triangluar castelated effect as it tries to integrate the over exposed CCD pixels. If you go to JFK airport you will find on the ground aircraft with these hanging triangles. If you seek out an East West highway almost anywhere in the Southwest of the United States you will spot lots of trucks with attached triangles. Happy hunting Post Extras

Entire topic Subject Posted by Posted on ufo over budapest? Tuskan 07/24/05 02:31 AM Re: ufo over budapest? FrankB   06/12/06 06:43 AM Re: ufo over budapest? syzygy   04/08/06 04:08 AM Re: ufo over budapest? hhgygy   10/07/05 06:54 AM Re: ufo over budapest? NHLfan   07/29/05 01:37 PM Re: ufo over budapest? agocsadam   11/09/05 09:57 AM Re: Imaging artifacts in budapest? AZTraveller   07/29/05 05:12 PM Re: Imaging artifacts in budapest? HerbertAmaral   01/08/08 05:22 PM Re: Imaging artifacts in budapest? ErrolWA   05/26/06 06:16 AM Re: ufo over budapest? MigRodz   07/24/05 07:13 PM Re: ufo over budapest? MightyPete   07/24/05 04:28 AM Re: ufo over budapest? AZTraveller   07/24/05 04:02 PM Re: ufo over budapest? hhgygy   10/07/05 06:57 AM Re: ufo over budapest? victpark   09/01/05 06:21 PM

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