I have seen a few below 10 deg. I have one at 5 tonight, and 6 in a few days, but weather and season do not cooperate. At my latitude we have nearly daylight all night now, and they are predicted -0.7 and -1.8. My two cents on the "cloud sweep" effect: It may be real, but not with the explanation given. Iridia rotate once per orbit, ie 3.6 deg/minute - the beam can rotate 7.2 deg/min (or less depending on geometry) This corresponds to 12.57 radians/6025 seconds, roughly 0.002 radians/s. Even at 3000 km range, this is 6 km/s, but the satellites moves more than 7 km/s, so rotation can only overtake motion on low flares. ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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