GAMMA Questions

Hello Sir Charles,
I am trying to perform spatial filtering in map coordinates using program '*spf_pt*'. Prior to this, I translated pt data into map coordinates using '*pt2geo*' with following commands.

1. pt2geo pt/ds - rslc/20170220.rslc.par - ORB/pdem DEM/EQA.dem.par DEM/20170220.diff_par 1 1 pt/ds_geo pt/dslat_lon
2. spf_pt pt/ds_geo pmask_ds DEM/EQA.dem_par ORB/pdiff1 ORB/pdiff1a - 0 25 0 - 34875 0

But, during spf_pt, program unable to read EQA.dem_par as it doesn't have similar parameters like rslc and provides following error.

• IPTA Program spf_pt.c ***
• Copyright 2017, Gamma Remote Sensing, v2.5 10-Mar-2017 clw ***
• Spatial filter and reference point bias removal for point data (single record or all records) ***
  reading point coordinate file: pt/ds_geo number of points: 25398715
  SLC parameter file: DEM/EQA.dem_par
  WARNING: subroutine rd_str, keyword not found: sensor
  WARNING: subroutine rd_str, keyword not found: date
  WARNING: subroutine rd_dbl, keyword not found: start_time
  WARNING: subroutine rd_dbl, keyword not found: center_time
  WARNING: subroutine rd_dbl, keyword not found: end_time
  WARNING: subroutine rd_int, keyword not found: line_header_size
  WARNING: subroutine rd_int, keyword not found: range_samples
  WARNING: subroutine rd_int, keyword not found: azimuth_lines
  WARNING: subroutine rd_int, keyword not found: range_looks
  WARNING: subroutine rd_int, keyword not found: azimuth_looks
  WARNING: subroutine rd_str, keyword not found: image_format
  WARNING: image_format parameter of SLC parameter file set to default: SCOMPLEX

WARNING: subroutine rd_dbl, keyword not found: range_scale_factor
WARNING: missing range pixel spacing scale factor is set to 1.0
WARNING: subroutine rd_dbl, keyword not found: azimuth_scale_factor
WARNING: missing azimuth pixel spacing scale factor is set to 1.0
WARNING: subroutine rd_dbl, keyword not found: center_latitude
WARNING: subroutine rd_dbl, keyword not found: center_longitude
WARNING: subroutine rd_dbl, keyword not found: heading
WARNING: subroutine rd_dbl, keyword not found: range_pixel_spacing
WARNING: subroutine rd_dbl, keyword not found: azimuth_pixel_spacing
WARNING: subroutine rd_dbl, keyword not found: near_range_slc
WARNING: subroutine rd_dbl, keyword not found: center_range_slc
WARNING: subroutine rd_dbl, keyword not found: far_range_slc
WARNING: subroutine rd_dbl, keyword not found: incidence_angle
WARNING: subroutine rd_str, keyword not found: azimuth_deskew
WARNING: subroutine rd_dbl, keyword not found: azimuth_angle
WARNING: subroutine rd_dbl, keyword not found: radar_frequency
WARNING: subroutine rd_dbl, keyword not found: adc_sampling_rate
WARNING: subroutine rd_dbl, keyword not found: chirp_bandwidth
WARNING: subroutine rd_dbl, keyword not found: prf
WARNING: subroutine rd_dbl, keyword not found: azimuth_proc_bandwidth
WARNING: subroutine rd_vec, keyword not found: doppler_polynomial
WARNING: subroutine rd_vec, keyword not found: doppler_poly_dot
WARNING: subroutine rd_vec, keyword not found: doppler_poly_ddot
WARNING: subroutine rd_dbl, keyword not found: receiver_gain
WARNING: subroutine rd_dbl, keyword not found: calibration_gain
WARNING: subroutine rd_dbl, keyword not found: sar_to_earth_center
WARNING: subroutine rd_dbl, keyword not found: earth_radius_below_sensor
WARNING: subroutine rd_dbl, keyword not found: earth_semi_major_axis
WARNING: subroutine rd_dbl, keyword not found: earth_semi_minor_axis
WARNING: subroutine rd_int, keyword not found: number_of_state_vectors
WARNING: subroutine rd_str, keyword not found: image_geometry

WARNING: missing image_geometry parameter in parameter file set to: GROUND_RANGE

WARNING: subroutine rd_dbl, keyword not found: azimuth_line_time
WARNING: missing azimuth line time calculated from start time, end time, and number of lines: -0.000000e+00

WARNING: subroutine rd_vec, keyword not found: first_slant_range_polynomial
WARNING: subroutine rd_vec, keyword not found: center_slant_range_polynomial
WARNING: subroutine rd_vec, keyword not found: last_slant_range_polynomial

SLC title: DEM
SLC number of range samples: 0
SLC number of range looks: 0
SLC number of azimuth lines: 0
SLC number of azimuth looks: 0

ERROR: number of range looks of SLC parameter file not equal to 1: 0

Can you recommend any solution? The program works fine with rslc paramter file.

Regards
Naeem