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Estimation of night light from the DMSP/OLS

Night light on land includes the temporal light which occurs by forests and fields fire, city fire and a volcanic explosion. However, the most part of the night light based on human activity, and this light can say a symbol of energy consumption. To observe night light can be said the barometer of this human activity quantitatively, and it can also be one way to measure spatial distribution of energy consumption handily. For these possibilities there is a satellite, DMSP (Defense Meteorological Satellite Program) observing night light. The OLS (Operational Linescan System) sensor onboard DMSP mission observes the night light periodically and globally. However, , there are few issues to be resolved in the observation data, such as the moon surface reflection of sunlight, secondary reflection from surface of the sea in influence of sunlight and an age of the moon by a change in solar altitude by night observations of OLS. The sensor gain of OLS is adjusted to minimize the influence. Therefore, analyzing quantitatively using the observed intensity of light, a method to revise the gain adjustment has to derive. But the information concerned with this gain adjustment isn't exhibited. So the object of the research is to take gain tuning parameter by these sunlight and surface of the moon light and to develop a correction way to the data observed by the fixed gain.