RE: NOAA12/15

From: Dale Ireland (direland@drdale.com)
Date: Thu Mar 15 2007 - 10:43:48 EDT

  • Next message: Lutz Schindler: "Obs 15.03.07"

     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
    
    
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