本期記錄只上幹活，廢話不多說，主要是後面與HEG配合使用，實現一系列研究與反演操作。
python環境：Python 3.5.2 +Pycharm
模塊包：pyhdf
安裝方法（命令行輸入）：
pip install pyhdf
一、獲取hdf數據集：
from pyhdf.SD import SD
HDF_FILR_URL = "E:\Persona_project\Py-Program\RS\modis\MOD021KM.A2018092.0300.061.2018092134259.hdf"
file = SD(HDF_FILR_URL)
info=file.info()#數據集個數
print(info)
ds_dict=file.datasets()#所有數據集名稱
for idx, sds in enumerate(ds_dict.keys()):
print(idx, sds)
二、獲取每個數據集數據：
# -*- coding:utf-8 -*-
# author:
from pyhdf.SD import SD
HDF_FILR_URL = "E:\Persona_project\Py-Program\RS\modis\MOD021KM.A2018092.0300.061.2018092134259.hdf"
file = SD(HDF_FILR_URL)
EV_1KM_Emissive = file.select('EV_1KM_RefSB').get()
print(EV_1KM_Emissive.shape)
三、獲取每個數據集屬性：
# -*- coding:utf-8 -*-
# author:
from pyhdf.SD import SD
HDF_FILR_URL = "E:\Persona_project\Py-Program\RS\modis\MOD021KM.A2018092.0300.061.2018092134259.hdf"
file = SD(HDF_FILR_URL)
EV_1KM_Emissive = file.select('EV_1KM_RefSB')
attributes = EV_1KM_Emissive.attributes()#獲取屬性
radiance_scales = attributes['radiance_scales']#輻亮度縮放尺度
radiance_offsets = attributes['radiance_offsets']##輻亮度偏移值
reflectance_scales = attributes['reflectance_scales']#反射率縮放尺度
reflectance_offsets = attributes['reflectance_scales']#反射率偏移值
print(radiance_scales)
print(radiance_offsets)
print(reflectance_scales)
print(reflectance_offsets)
