@inproceedings{ead3d3aee8f449c18111be32e7fe3a92,
title = "Lesson and learn of the adjustment of gain level settings for FORMOSAT-2 remote sensing instrument",
abstract = "The FORMOSAT-2 (FS2) is equipped of Remote Sensing Instrument (RSI) with the panchromatic (PAN) and multispectral (MS) bands. The MS bands include blue, green, red, and near infrared. There are 10 selectable gain levels for each band to optimize the dynamic range of FS2 images. The physical meaning of RSI gain can be considered as the ratio of CCD output digital counts to input radiance. For a constant range of output digital counts (8 bits for FS2 image), the images of different regions need different gain level setting due to different input radiances. Currently, the selection of gain levels is based on the global gain map provided by Centre National d'Etudes Spatiales (CNES) and SPOT Imaging. According to FS2 experience, the gain setting does not fully meet the practical implementations, for example the variation in observation from snowfall to ice melting. We also noticed that some of default gain level settings are not suitable for the imagery of islets. Therefore, it is necessary to timely adjust the gain levels for optimizing the FS2 imagery. For the simplest case, a saturated (overexposure) image can be properly adjusted by reducing the gain level before the next image acquisition. In this work, we present examples of gain adjustment, some rules, and discuss its application results as well as statistic analyses.",
keywords = "FORMOSAT-2, Gain setting, Image, Remote sensing",
author = "Wu, {B. H.} and Liu, {J. Y.} and Hsu, {K. H.} and Wu, {A. M.}",
year = "2011",
language = "???core.languages.en_GB???",
isbn = "9781618394972",
series = "32nd Asian Conference on Remote Sensing 2011, ACRS 2011",
pages = "2046--2051",
booktitle = "32nd Asian Conference on Remote Sensing 2011, ACRS 2011",
note = "null ; Conference date: 03-10-2011 Through 07-10-2011",
}