Hi, Hope Im not wasting bandwidth and people complain. There has been a little saga about my observations of USA 116 on the 3rd Feb with various analysts ( - I used a dictionary!) saying one time was out by 2 seconds and others saying it was a different time from the time I had corrected. After playing back the video tape several times- a distinct advantage of the CoSaTrak system where I have hard copy of a satellite pass, I could find NO time error in any of the original times I reported. This now had me worried as my next thought was that my time system was skipping seconds which would really be a problem. However after finding no errors in time I then checked the positions reported and I believe I have found my "time error". The observation made at 22h54m38.58sUT originally had a reported position of RA15h40.99m, Dec-38d49.00' - this is INCORRECT - it should be RA15h39.69m,Dec -38d40.76'. It just happens that the original reported position lies close to the satellite track and was where the satellite would have been about 2 seconds earlier! I used SAO stars 206827 and 206887 to define a "finishing line" and its easy to see that the original position is some way from this. What I suspect happened is that my mouse moved after measuring the correct position and I did not notice it and I reported the wrong mouse cursor position. So it looks like it pays to check each observation carefully, and make sure the mouse cursor has not moved ( I must get a better mouse - the one I have is pretty putrid anyway - you get what you pay for! ) Best wishes Greg ----------------------------------------------------------------- Unsubscribe from SeeSat-L by sending a message with 'unsubscribe' in the SUBJECT to SeeSat-L-request@lists.satellite.eu.org http://www2.satellite.eu.org/seesat/seesatindex.html
This archive was generated by hypermail 2b29 : Wed Feb 07 2001 - 09:08:57 PST