If you have a good overhead visual pass of NOAA 12 and 15 June 3 then one of them will be looking down at the other which will be sunlit while the background (Earth) will be dark > -----Original Message----- > From: Bob Christy [mailto:rdc@zarya.info] > Sent: Thursday, March 15, 2007 2:38 AM > To: 'Seesat-L' > Subject: RE: NOAA12/15 > > NOAA's imaging system is designed to look vertically > downwards at large-scale objects. > > At 1 km, the resolution of the radiometer that feeds the HRPT > system is about 15 metres. NOAA's solar panel span is 6 > metres and the body is 4 x 2 metres. > > If one NOAA passed directly below the other at significantly > less than 1 km range, and with sufficient visible/IR contrast > against the brightness of the Earth, then it might show up as > a defect in an image. > > If it were to be detected at the APT resolution, then expect > cessation of service followed by addition of a some fragments > to the Catalogue. > > We may be heading OT here - I will post no more. > > Bob Christy > > > -----Original Message----- > > From: Dale Ireland [mailto:direland@drdale.com] > > Sent: 15 March 2007 04:27 > > To: 'Seesat-L' > > Subject: NOAA12/15 > > > > Hello > > It appears that during the time period centered on June 3 > Noaa 12 will > > slowly pass Noaa 15 within 5-50 miles. Could be interesting > visually. > > Their orbits are not perfectly circular so they will both have > > opportunities to image the other although one will have APT off > > because they both broadcast on the same frequency. HRPT > could be worth > > watching. Does anyone have any details on this close approach? > > Dale ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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