>> Mike McCants observed: >> MM>But you should be aware that TrakSat oftens predicts that objects >> MM>are not in the Earth's shadow even when they are. >> Does anyone have a comparison of satellite tracking programs' >> predictions of orbital eclipse? Is there a program that predicts this >> reliably? I noticed large differences when I compared TrakSat, QuickSat, SkyMap, SeeSat (and possibly ViewSat) with photographs I made of a high Cosmos rocket, a shuttle, UARS and a few visual obs. when entering shadow. I sent my data to Rob Matson, and with his modifications I consider SkyMap very reliable now. In graphic it displays the penumbral phase in purple. In the Search-all text output, it displays the shadow entry/exit instead of user-selected low-elevation limit, if they are higher. (If Lighting constraints/Satellite in sunlight is selected) ------------------------------------------------------------ -- bjorn.gimle@online.dextel.se +46-8-7428086 -- -- bjorn@tt-tech.se +46-8-59095739 -- --(bjorn.gimle@duesenberg.se) 59.22371 N, 18.22857 E -- ------------------------------------------------------------