ADEOS-II/GLI L3 STA Map Cloud Optical Thickness of ice cloud by emission method (16days,1/4deg) is obtained from the GLI (Global-Imager) sensor onboard ADEOS-II and produced by the Japan Aerospace Exploration Agency (JAXA). Global environment change has become a worldwide concern in recent years. In order to clarify these environmental changes, the Advanced Earth Observing Satellite (ADEOS-II, renamed "Midori II" after launch) has been developed for the purpose of monitoring the Earth environment using remote sensing technology from space. Midori II carries mission instruments that are particularly dedicated to clarify the water energy cycle and the carbon cycle, and is expected to be utilized for international climate change research programs. GLI an optical sensor that observes the reflected solar radiation from the Earth's surface, including land, oceans and clouds and/or infrared radiation with a multi-channel system for measuring the biological content. The SGLI has a swath of 1600 km. This product is cloud optical thickness of ice cloud which is retrieved from multi-channel radiance (channel 30, 35, 36) applying emission method. This product is the representative values, which are estimated from level 3 binned products and projected onto map. The provided format is HDF. The physical quantity unit is none. The spatial resolution is 25 km and the statistical period is 16 days, also 1month statistics is available. Map projection is EQR. The generation unit is global. The current version of the product is "Version 2".