利用IDL调用6S模型建立查找表，省时省力-IDL call 6S model use a lookup table, saving time and effort

真实反照率计算程序，根据查找表将黑天空和白天空反照率转换为真实反照率，附件带查找表-Real albedo calculation program, according to a lookup table to convert the black sky and white sky albedo albedo is true, the lookup table with annex