Optical 06 July 2011 Part 1

From: Greg Roberts (grr@telkomsa.net)
Date: Thu Jul 07 2011 - 14:51:08 UTC

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    Observations 06 July 2011
    ---------------------------------
    
    Cosatrak 1 (Computerised satellite Tracking System).
    Camera mount now carries two systems that can be operated
    together as two totally different sytems and computers used.
    Generally the DSI Pro II camera will be used for high altitude
    slow moving objects. Tests seem to indicate that its sensitivity
    is comparable to the MINTRON ( possibly better) but as its not
    possible (?) to time stamp to better than 1 second accuracy the
    time resolution is not good enough for LEO objects.
    
    Meade DSI Pro II Monochrome CCD camera without filters.
    using integration times of 05 sec min to 30 seconds maximum
    depending on brightness of sky in particular area.No image
    processing done but dark field applied.
    Used with 102mm aperture f/2.56 refractor ,field of view 84 x 63
    arc minutes. Can get to magnitude 13 or so in less than 20 seconds
    exposure.
    Exposure time to nearest second inserted into image FITS header
    from PC clock which is checked against GPS signal.
    Images processed and automatically reduced using APEX.
    
    Site 0433 : Longitude 18.51294 deg East, Latitude -33.94058 deg,
    Elevation 10 metres-situated in Pinelands (Cape Town),South Africa
    
    FOR CLASSFD.TLE:
    -----------------------
    AEHF -1
    36868 10 039A   0433 G 20110706212657000 56 15 1959055+060335 39  +115 05
    36868 10 039A   0433 G 20110706212831000 56 15 2000042+060447 39  +115 05
    36868 10 039A   0433 G 20110706212955000 56 15 2000558+060620 39  +115 05
    36868 10 039A   0433 G 20110706213112000 56 15 2001428+060704 39  +115 05
    36868 10 039A   0433 G 20110706213228000 56 15 2002295+060839 39  +115 05
    36868 10 039A   0433 G 20110706213317000 56 15 2003010+060913 39  +115 05
    36868 10 039A   0433 G 20110706213409000 56 15 2003325+060959 39  +115 05
    
    Notes:
    ---------
    (1) Excellant conditions so long session - approx 41 classified high
        altitude satellites observed. Unfortunately due to other pressures
        not able to reduce today so only did AEHF -1. Rest hopefully to
        follow tomorrow.
    
    (2) AEHF-1 easy ONCE found :-))). Steady at about mag +11.5
    
    Cheers
    Greg
    
    
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