Analysis of Barriers to Blue Band Albedo Satellite Observations in Iran

Albedo is one of the parameters needed in environmental and climate studies. Therefore, examining its temporal and spatial behavior can be a tool for understanding environmental changes. The MODIS sensor produces Albedo the surface of the earth continuously on a global scale with low spatial resolution and provides free access to the public. In this study, for measuring the Analysis of Barriers to Albedo Observations in Iran, The first daily data of Albedo MODIS Sensor in the kernel of Iran was downloaded from the MODIS website during the period from 2000/03/20 to 2018/12/31 for 6867 days. After mosaic tiles, based on 48 billion observations, the long term frequency of land surface Albedo Iran was calculated separately for each season. The results showed that the limiting factors of satellite view were different at times and places. Humidity has a limiting role in summer, especially on the coast of Oman. In the winter, especially in the Alborz and the Zagros Mountains, cloudiness is a limiting factor. In addition to the humidity and cloudiness factors, Dust storms are also known to limit albedo harvest. Surveys of 394 ground stations proved that more than 70 percent of the factors listed were reported when the satellite was unable to measure albedo.