Landsat8 data opening and Radiation Calibration

Us usgs (http://glovis.usgs.gov/Docs File. Landsat8 adds several bands. For details, visit http://blog.sina.com.cn/s/blog_764b1e9d01016gvh.html.

In envi5.0sp3, landsat8 data is very easy to open, as shown below:

(1)   Select File> open, and select _mtl.txt to open the file.

(2)   ENVI automatically displays RGB real-color images. In the Data Manager dialog box, ENVI automatically reads metadata, including the central wavelength and band name. Data is automatically divided into three types based on the type.

(3)   From the file information, we can see that the thermal infrared data is re-sampled to a 30-meter resolution, consistent with the visible-Near-infrared band, and the full color is 15 meters.

Figure 1: Data Manager dialog box

After opening, you can easily perform other processing, such as radiation calibration, atmospheric correction, and fusion. The following uses the universal calibration tool under envi for the landsat8 radiation calibration.

(1)   Select toolbox/Radiometric Correction/radiometric calibration and visible-Near-infrared data.

(2)   In the radiometric calibration panel, you can select the calibration type: radiant Brightness Value and atmospheric apparent reflectivity.

(3)   Other options are convenient for flaash atmospheric correction.

(4)   Select File Name and path output

(5)   3. Obtain the atmospheric apparent reflectivity data.

Figure 2: radiometric calibration panel

Figure 3: Atmospheric apparent Reflectivity