openairsar_new

(rtools/openairsar_new.m)

Function Synopsis

[data,structure,radvec] = openairsar_new(filedir,filecode,frequency,start_line,load_lines)

Help text

function [data,structure,radvec] = openairsar_new(filedir,filecode,frequency,start_line,load_lines)

 Open compressed AirSAR data using text format (where hdxxxx.log is present). Tested
 on processor version v6.35. This is much simpler, but it will only work on newer data
 sets where the headers are supplied as a text copy in hdxxxx.log and the radiation
 correction vectors as 'cmxxxx_rad_vec'

 If this routine does not work, try openairsar.m which reads a single .dat file, and
 does not require the asssociated hdxxxx.log files.

 note that start_line goes from 1.
 DUE TO THE COMPRESSION, THE DERIVED COVARIANCE MATRICES MAY NOT ALL BE POSITIVE DEFINITE

 data is in the form data.hhhh data.hvhv data.vvvv data.hhhv data.hvvv data.hhvv
 each as a matrix of [range_samples, time_lines] ordered from near_range,first_time = 1
 structure is a matlab structure of the log file
 radvec is the radiometric correction vector (where available)
 radvec.hh radvec.hv radvec.vv size [range_samples,1]

 source is pdf's referenced at:
 http://airsar.jpl.nasa.gov/documents/instrument.htm
[1] Airsar Integrated Processor Documentation Data Formats
[2] Understanding Synthetic Aperture Radar Images, Chris Oliver, Shaun Quegan, 
     1998, Artech House

 Part of the Matlab Radar Toolbox v0.11 by Glen Davidson at www.radarworks.com
 Please acknowledge use of this toolbox in any publication or software.
 This header must be retained in any derivative work