Optical 19 March 2014

From: Greg Roberts <grr_at_telkomsa.net>
Date: Thu, 20 Mar 2014 17:03:21 +0200
 Observations 19 Mar 2014:
 ----------------------------
 
 MINTRON low light level CCD surveillance camera (0.005 lux typical
 in non integration mode) and 0.00005 lux in STARLIGHT mode with 128
 frame integration.
 
 Used with 50MM focal length f/1.8 lens, field of view 5 x 7 degrees.
 
 Site 0433 : Longitude 18.51294 deg East, Latitude  33.94058 deg S,
 Elevation 10 metres - situated in Pinelands (Cape Town), South Africa
 
 
 FOR CLASSIFIED.TLE:
 ----------------------
 21808 91 076D   0433 F 20140319175456900 56 15 0658034+252022 39
 21808 91 076D   0433 F 20140319175521200 56 15 0705119+225157 39
 21808 91 076D   0433 F 20140319175534800 56 15 0709164+212322 39
 21799 91 076C   0433 F 20140319175951600 56 15 0648593+231732 39
 21799 91 076C   0433 F 20140319180003800 56 15 0652252+220236 39
 21799 91 076C   0433 F 20140319180015900 56 15 0656005+204423 39
 26906 01 040B   0433 F 20140319184715500 56 15 0735286+243745 39
 26906 01 040B   0433 F 20140319184721500 56 15 0738327+253449 39
 90046 05 864A   0433 F 20140319192641800 56 15 0602362+142919 39
 90046 05 864A   0433 F 20140319192655000 56 15 0603045+140901 39
 90046 05 864A   0433 F 20140319192703200 56 15 0603228+135618 39
 90046 05 864A   0433 F 20140319192709500 56 15 0603334+134534 39
 
 STRAYS SEEN:
 ----------------
 03597 68 110A   0433 F 20140319180936900 56 15 0701457+241016 39
 07218 74 015A   0433 F 20140319182748900 56 15 0741161+220258 39
 25679 99 019D   0433 F 20140319181540700 56 15 0709326+221824 39
 36600 10 028C   0433 F 20140319181157800 56 15 0700445+212013 39
 38996 12 063B   0433 F 20140319181009000 56 15 0709065+222759 39
 39494 13 073C   0433 F 20140319175250900 56 15 0657041+233113 39
 39254 13 049B   0433 F 20140319180826800 56 15 0712050+215405 39
 
 NOTES:
 -------
 (1) Trying something different. I have several video cameras
    gathering dust and after some persuasion by Cees, Scott and Leo
    I thought I would look into the question of duplicating their
    techniques and using the software written by Cees for a setup
    that would basically operate through the night and not require
    my presence - I believe nighttime is sleep time! So this is
    the first attempt  but not yet using the software by Cees as
    that is a steep learning curve for me as its an alien operating
    system (XUBUNTU) about which I know absolutely zero.
    So for the moment testing out video cameras and lenses and using
    Windows software to determine best codec to use for reasonable
    sized good quality video files that may be recording for as much
    as 8-10 hours. I want to develop a system that is completely
    independent of my present setup.
 
 (2) Unlike my northern observers I do not have a "sweet spot" for
    satellites - ie a location in the sky where I can keep the camera
    stationary the whole night and expect to get a fair number of
    classified leo satellites passing through the field of view. I am
    too close to the equator which means the southern apex of the NOSS
    satellites is at too low an elevation to be practical with relatively
    wide fields and low detector sensitivity and a bright city lit sky.
 
 (3) For the observations above I simply chose Jupiter at the start of the
    session and once the earths shadow became a problem for LEO sats I
    simply moved to azimuth 320 and kept the elevation at about 30
    degrees - the idea of aiming northwards was to try and get the low
    inclination GTO objects. Instead I got three NOSS objects and a
    Molniya object during the hour that I could observe - stopped by
    cloud.
 
 (4) I am not a lover of video imagery - much preferring that produced
    by a proper CCD camera. I do not want to use my expensive
    FLI 8300M  CCD camera - ideal for the task - for several reasons -
    weather and  possible eventual failure of the shutter "blades," but I
    have a  Meade DSI Pro II sitting idle but the problem there is time is
    only  accurate to about a second but it could be useful in at least
    finding lost objects , so that may also be added.  Anyway there are
    lots of  problems to solve so Im taking it slowly.
 
 (5) This session lasted about 80 minutes, and produced almost a 2 Gbyte AVI
    file (Pal 720 x 576 pixel ) using Microsoft MPEG 4. The image size does
    not match the display given by GUIDE so had to be converted to 720 x 540
    format. At the moment I do not know why.Anyway a lot of experimenting
    to do and then , if I survive that long , Ill tackle Xubuntu!
 
 Cheers
 Greg
 
 
 
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Received on Thu Mar 20 2014 - 10:03:11 UTC

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