2-Landsat Radiation Calibration for the extraction of text-frequency * ~

Reference: http://blog.csdn.net/kupe87826/article/details/8125720

Http://www.gisall.com/html/78/6678-5654.html

 

Source: http://blog.csdn.net/kupe87826/article/details/8129975

 

Software environment: OS win7
, Envi5.0

I. Data sources

My data is downloaded from usgs, because the landsat7's webpage was downloaded from 2003 (le71340332001296sgs00.tar.gz ). The original data is described as follows:

WRS reference grid:

Wrs_path= 134

Wrs_row = 033

 

Image Acquisition Time:

Date_acquired = 2001-10-23

Scene_center_time = 03:50:11. 2501468z

Coordinates of four image points

Corner_ul_lat_product = 39.86405.

Corner_ul_lon_product = 97.85069

Corner_ur_lat_product = 39.85826.

Corner_ur_lon_product = 100.63202

Corner_ll_lat_product = 37.92064.

Corner_ll_lon_product = 97.88160

Corner_lr_lat_product = 37.91524

Corner_lr_lon_product = 100.58815

 

The image is as follows:

 

 

 

Ii. Radiation Calibration

1,
Open Image

(1) file-> open external file-> Landsat-> geotiff with metadata, select * _mtlold.txt

 

The list of opened bands, for example, the third file (including band 123457) in my main band list ).

 

 

Band 742 to synthesize RGB, such:

 

 

2. Radiation Calibration

Function: basic tools> preprocessing> calibration utilities> Landsat Calibration

(1) Select a file

(2) set parameters. Because we open the parameter in metadata mode, many parameters have been set for us. For calibration type, select radiance (because we need to perform atmospheric correction later, cannot select reflectance)

(3) Fill in the output file, OK, and perform operations. The scaled spoke brightness image is synthesized at 742, for example.