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An NCAR/EOL supported program that computes the INS and radar pointing angle errors. The framework of the plotscatter program is documented in Testud et al. (1995). The plotscatter program output suggestions on possible errors/biases on 8 parameters. Users need to manually update these corrections in the CFAC files. New ground-echo files using the updated navigation corrections (CFAC files). The final corrections are obtained via an iterative process until the ground is flat and not moving. A batch version of the plotscatter program (driven by Perl script) is available to automate the entire process. Please refer to the plotscatter documentation for further information.