Observing a MetOp-A flare tonight at 20:01:17 UTC, 31-MAR-09, I visually had the impression of a yellowisch/orange color. But checking the picture I took of it showed a distinct rainbow effect. In the four seconds surrounding maximum the color changed from green via yellow to orange. Maximum itself was at the border between green and yellow. Another observer a few km south of my position recorded the same phenomenon using a different camera with different settings. So the effect is real. This means that different colors reflect in slightly different directions from the Metop-ASCAT antenna surfaces. Although I have seen and also photographed a number of Metop flares this is the first time that I observed this rainbow behaviour (although I suspected it already). Gerhard HOLTKAMP Darmstadt, Germany 49.8822N, 8.6558E ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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