The process control flag at the start of the master result file is switched to 1 at successful exit.
readfiles: 1
Example of output of this step (in master result file). (The positioning data of the platform from the leader file has been deleted in this example. This happens automatically after step M_PORBITS (getting the precise orbits)). This output is appended to the master result file.
******************************************************************* *_Start_readfiles: ******************************************************************* Volume file: /cdrom/scene1/vdf_dat.001 Volume_ID: 1 Volume_identifier: 0004093800014027 Volume_set_identifier: 19950830 9491991 (Check)Number of records in ref. file: 26558 Product type specifier: PRODUCT:ERS-1.SAR.SLC Location and date/time of product creation: IPAF 24-07-1998 Scene identification: ORBIT 21567 DATE 30-08-95 Scene location: FRAME 2781 LAT:40.94 LON:14.03 Leader file: /cdrom/scene1/lea_01.001 Scene_centre_latitude: 40.9380000 Scene_centre_longitude: 14.0270000 Radar_wavelength (m): 0.0566660 First_pixel_azimuth_time (UTC): 30-AUG-1995 09:49:20.453 Pulse_Repetition_Frequency (actual, Hz): 1679.9020000 Total_azimuth_band_width (Hz): 1378.0000000 Weighting_azimuth: HAMMING Xtrack_f_DC_constant (Hz, early edge): 437.9780000 Xtrack_f_DC_linear (Hz/s, early edge): 7154.0000000 Xtrack_f_DC_quadratic (Hz/s/s, early edge):-380000000.00000 Range_time_to_first_pixel (2way) (ms): 5.5458330 Range_sampling_rate (leaderfile, MHz): 18.9624680 Total_range_band_width (MHz): 15.5500000 Weighting_range: HAMMING Datafile: /cdrom/scene1/dat_01.001 Number_of_lines_original: 26183 Number_of_pixels_original: 4900 ******************************************************************* * End_readfiles:_NORMAL *******************************************************************
Note that Product specifies "ASAR" for ASAR, which is used later.
A number of these lines is only for your information. The lines after Leader file: are used for the further processing (except Weighting identifiers). These strings may not be altered. We encountered a problem once when there was a blank in the UTC time, instead of a zero, but this should be fixed.
The logfile shows more details. Also some information is echoed to the screen (as "INFO: .."), such as the Doppler centroid frequency, evaluated at some ranges, the corners of the images in latitude longitude, etc.
Defaults for parameters (slcimage.cc; Doris can still crash if not correct, e.g., the approximate coordinates of the scene):
wavelength = 0.0566660.; // [m] default ERS2 t_range1 = 5.5458330/2.0e3; // [s] one way, default ERS2 prf = 1679.902.; // [Hz] default ERS2 abw = 1378.0; // [Hz] default ERS2 rsr2x = 18.9624680*2.0e6; // [Hz] default ERS2 rbw = 15.55e6; // [Hz] default ERS2