% specify_parameters.m
%
% Run this program first to set up parameters for each data run. The run
% parameters are stored in the file "CD_run_params.mat" in the current
% directory. The program "extract_data.m" reads this file and adds some
% fixed radar parameters to the file. Subsequent programs can read this
% file to obtain the parameters needed for the SAR processing.
%
% The radar data are stored on the CD supplied with the book, but they
% can be read from a disk file copied from the CD to your hard drive.
%
% The only file needed from the CD is "dat_01.001", which contains the
% radar data as well as the chirp replica and auxiliary data for each range
% line. As none of the parameters like PRF and range gate delay change in
% this data set, and the replica is well defined by a linear FM chirp, the
% only data that are really needed from the CD is the raw radar signal data
% contained in "dat_01.001". The radar parameters are stored in the
% program "extract_data.m".
%
% The radar data can be written in one block, or broken up into a number of
% blocks, with a set of files for each block.
%
% The first range cell and the number of range cells can be set to any
% value within the boundaries of the data array. The first range line
% should be set to 1 plus a multiple of 8, and the number of lines per
% block set to a factor of 8. Also, the number of lines should be set to a
% multiple of the number of lines per block. If these rules are not
% obeyed, the "extract_data.m" program will quantize the values accordingly.
% Parameters to specify for each run:
% -----------------------------------
% input_path : location of the radar data file 'dat_01.001'
% output_path : location for the extracted data files
% output_prefix : prefix to the extracted data file names
%
% first_rg_cell : first range cell to extract
% Nrg_cells : number of range cells to extract
% first_rg_line : first range line (azimuth sample) to extract
% Nrg_lines : number of range lines to extract
% Nrg_lines_blk : number of range lines per block
% UseMATfiles : Set to 0 if you want binary header, data, aux and replica
% files (.DAT) rather than just the MATLAB data files (.MAT)
% -------------------------------------------------------------------------
% Created : Nov 29, 2004 by Kaan Ersahin
% Modified: Nov 30, 2004 by Kaan Ersahin
% Modified: Dec 3, 2004 by Ian Cumming
% - moved fixed parameters to "extract_data.m"
% - now use a fixed parameter file name for all programs
% - added UseMATfiles option (=1 for MAT files)
% -------------------------------------------------------------------------
clear, home, format compact
% Define location of data files
% input_path = 'Y:\RSAT\scene01\'; % These values are for runs at UBC
% output_path = 'Y:\RSAT\EXTRACTED_DATA\';
% input_path = 'C:\a_RADARSAT_Processing\Read_the_CD\RAW_CD\scene01\';
% output_path = 'C:\a_RADARSAT_Processing\Read_the_CD\EXTRACTED_DATA\';
input_path = 'E:\合成孔怪雷达数据\';
output_path = 'G:\';
CD_data_file_name = 'dat_01.001';
output_prefix = 'raw';
%==========================================================================
% Define area of interest of the radar data to be extracted
% Note that the azimuth parameters are quantized in "extract_data.m"
%
% Here are some possible values for first_rg_cell and first_rg_line:
% For coal & ferry terminals, use range = 970, azimuth = 1801
% For Vancouver airport, use range = 1060, azimuth = 5561
% For UBC and one ship, use range = 760, azimuth = 7097
% For Stanley Park & city, use range = 1850, azimuth = 7657
% For English Bay ships, use range = 1050, azimuth = 7769
% For Squamish & Garibaldi, use range = 2640, azimuth = 16169
% For Brackendale, use range = 2800, azimuth = 17897 (max az)
%
% first_rg_cell = 1050; % Define the range limits
% first_rg_line = 7769; % Define the azimuth limits (19432 max)
%
% Nrg_cells = 2048 % Suggest 2048 cells
% Nrg_lines_blk = 6*256; % Suggest 1536, it should be larger than the
% % size of the azimuth match filter (705)
% % so that an image can be created.
% Nrg_lines = 2*Nrg_lines_blk;
first_rg_cell = 1; % Define the range limits
first_rg_line = 1; % Define the azimuth limits (19432 max)
Nrg_cells = 19432 ; % Suggest 2048 cells
Nrg_lines_blk = 9288; % Suggest 1536, it should be larger than the
% size of the azimuth match filter (705)
% so that an image can be created.
Nrg_lines = 2*Nrg_lines_blk;
UseMATfiles = 1; % (1) Use MAT files to save the extracted data
% (0) Use binary files to save the extracted data
SaveV6 = 0; % (1) Save data in MATLAB v6 format when using v7
% (0) Save data in MATLAB v7 format
% This variable is only used if you are running MATLAB 7
%==========================================================================
% Save the data and run parameters in a matlab data file (*.mat)
vv = version; vers = str2num(vv(1)); % Find MATLAB version
if vers == 6, SaveV6 = 0; end
if SaveV6
save -v6 CD_run_params
fprintf('\nData parameters written to: CD_run_params.mat in V6 format')
else
save CD_run_params
fprintf('\nData parameters written to: CD_run_params.mat')
end
fprintf('\nNow run "extract_data.m"\n\n')
beep, pause(0.4), beep
%% This setup program is now finished, but you can add calls to subsequent
%% data extraction and processing programs below, if desired.
% extract_data % Extract the SAR data from the CD
% compute_azim_spectra % Find the baseband Doppler centroid
% compress_data % Perform SAR processing
