On a private question of David but for general enterest some notes about eclipsing Geosats:
With every equinox periode (march 20 and september 20) are from viewpoint of the geostationairy satellites solar eclipses. This means that the earth is travelling between the sun and satellite. This is happening around local midnight and the sun makes satellite senors blind, because the light and other solar radiations shines into these sensors. Some local midnight images are missing for that reason.
Same effects for local noon images: Sun is shines from the back of the satellites. Images could be become false spickels because of effects of solar radiations due data transmission. Also for that reason sometimes missing frames as for the present D3 sector of Meteosat 7.
The eclipse periode starts around 25 days before equinox and ends 25 days after. Around April 15 goes everything als normal to september.
Hopes this helps,
Nieuw: Meteosatfoto's met transparanten van Bracknell weerkaarten; kijk op:
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