研究了一下,感觉可能是云反射的月光或者是船只的累积灯光,看面积,云的可能性比较大。
因为不知道这个图片来源,所以我猜测来自于美国的DMSP (Defense Meteorological Satellite Program)系统图片的处理结果。这个系统能分辨很多种光源,主要在夜晚拍摄。
The image was made by the orbiting Defense Meteorological Satellite Program (DMSP) satellite over regions of the world at night. The DMSP is a Department of Defense (DoD) program run by the Air Force Space and Missile Systems Center (SMC). The Defense Meteorological Satellite Program satellites carry the Operational Linescan System (OLS) in low-altitude polar orbits. These satellites record nighttime data. The Operational Linescan System has a unique low-light imaging capability developed for the detection of clouds using moonlight. In addition to moonlit clouds, the OLS also detects lights from human settlements,fires, gas flares, heavily lit fishing boats, lightning and the aurora. It is possible to distinguish four primary types of lights present at the earth's surface: human settlements, fires, gas flares, and fishing boats.
上面摘自这个网站,里面有几张不同时间拍摄的照片。
http://www.globalsecurity.org/military/world/dprk/dprk-dark.htm
[ 本帖最后由 cleverpig 于 2008-9-23 22:58 编辑 ] |