Updated Resourcesat 2 elements

From: Ted Molczan (ssl3molcz@rogers.com)
Date: Sat Apr 23 2011 - 15:54:44 UTC

  • Next message: alberto rango: "4641 SATOBS 22 APR 2011."

    Greg Roberts has reported Doppler radio observations of Resourcesat 2, made on two consecutive passes on 2011 Apr 23,
    the latest just before 09:00 UTC. It was running several minutes late, which indicates a small orbit raising manoeuvre,
    which I believe may have occurred on 2011 Apr 22 near 05:44 UTC, when the spacecraft was at apogee, passing near India.
    
    Using a synthetic observation based on the original orbit, at the apparent time of manoeuvre, and Greg's observed data,
    I estimate the following orbit. Epoch is that of Greg's reported time of closest approach on his second pass:
    
    Resourcesat 2
    1 37387U 11015A   11113.37466435  .00000000  00000-0  00000-0 0    04
    2 37387  98.7790 185.4714 0002000 282.9171 290.2868 14.20853089    07
    
    I recommend allowing one or two minutes prediction time uncertainty tonight.
    
    Ted Molczan
    
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