I am trying to convert ASTER image from DN values to reflectance. For this I require gain coefficient of each image in the collection I have gathered.
//Defining geometry var geometry = ee.Geometry.Polygon([[72.8,29.8], [74.7,28.27], [77.6,30.1], [75.6,31.6], [72.8,29.8]]); //Creating collection var collection = ee.ImageCollection('ASTER/AST_L1T_003') .filterBounds(geometry) .filterMetadata('CLOUDCOVER', 'less_than', 2) //.filterDate('2004-01-01', '2004-03-28') ; print('Collection: ', collection); //Filtering data for specific day of year var collection_121_134 = collection.filter(ee.Filter.dayOfYear(121,134));
Now this collection_121_134 contains 59 elements (i.e. 59 image tiles). For each tile I want to access its gain coefficient value which is found in: Collection>>features( total no of tiles)>>any tile selected>>properties>>'GAIN_COEFFICIENT_B01'.
Please suggest a method through which I can access this information, which will help me in converting the images to their reflectance values.