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Depending on the exposure, you can also see noise in photos taken in space. http://upload.wikimedia.org/wikipedia/commons/archive/9/95/20101117130624%21Tracy_Ca
by AngryParsley 15y ago
Depending on the exposure, you can also see noise in photos taken in space. http://upload.wikimedia.org/wikipedia/commons/archive/9/95/20101117130624%21Tracy_Caldwell_Dyson_in_Cupola_ISS.jpg http://upload.wikimedia.org/wikipedia/commons/archive/9/95/2... is a decent example. The cameras used by the ISS crew are pretty high-quality, so I doubt all those hot spots are from a bad sensor. They're most likely cosmic rays.
- danvet 15y agoLooks like taken with rather dim lighting, i.e. high-iso. In which case all these dots in the dark area could be explained as hot pixels (pixels that have a tiny bit of leakage that then shows up when massively amplified). Of course, that leakage might be due to comsic rays ;-) but the amount of them doesn't look worse than what you might get on earth (depening upon circumstances). Also, with really long exposures, this leakage tends to add up, too.
- AngryParsley 15y agoEXIF data days the exposure time was 1/1600th of a second at ISO200. The earth is really bright and that is a ton of hot spots for such a low ISO, fast exposure.