In ASPSuite, the Enable Base Antenna Calibration option uses an *.atx file to set custom offsets for the brand and model of the base station used. At https://www.ngs.noaa.gov/ANTCAL/, a user may navigate to “Browse Antenna Information by Manufacturer and Model” and select the brand from the dropdown menu. Next, find the correct model and right-click on “ANTEX” and select the “Save link as…” option.
Click on the ellipses, “…”, button in ASPSuite to browse to this downloaded file and use it for this setting.
See Determining the Correct Base Antenna Calibration File for more details.