ObsReduce 1.3 beta 04 supports camera users

From: Ted Molczan (molczan@rogers.com)
Date: Tue May 31 2005 - 01:17:50 EDT

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    ObsReduce 1.3 introduces support for observers who record satellite transits
    using cameras, by means of two new geometries: the satellite may be located to
    the right or left of a pair of stars, or in any configuration with three stars.
    The reduction algorithms require the physical length on the image between one
    pair of stars, and between each star and the satellite, which must be determined
    independent of ObsReduce. The program accepts lengths measured using a ruler or
    calipers, or the pixel coordinates of the satellite and stars, from which it
    will compute the required lengths.
    Many thanks to Scott Campbell, who developed the algorithms, and performed the
    initial beta tests of them.
    Scott has used his two star algorithm for some time, and he used the ObsReduce
    beta implementation of both algorithms to reduce his observations of May 23, 24
    and 29 UTC:
    I have included quite a few of these observations in recent orbital analyses,
    and found their accuracy to be generally excellent. Time residuals typically
    were 0.03 s or better (often 0.01s or 0.02 s); cross-track residuals commonly
    better than 0.01 deg.
    Scott has found beta 04 to be trouble-free with camera observations, and I have
    found likewise with non-camera observations, so I believe it is time to widen
    the beta test to all who are interested.
    If you have already installed a previous version of ObsReduce, you need only
    download the new executable file and manual:
    Simply extract the new files into the directory in which the earlier version has
    been installed. You may wish to back up the earlier version, in case you need to
    go back to it.
    The camera reduction features are described mainly in Section D.9.2 of the beta
    04 manual.
    First time users must first install an earlier version, such as 1.2.4, and a
    star file, both of which are available here:
    Please send any bug reports, questions, comments or suggestions to me off-list.
    Ted Molczan
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