The operation flow of measuring baseline file is as follows: first, create a new export format in the "export" option of TGO software, and select a "custom" format for the export format, and then edit the text with the changed format accordingly, so that the baseline data calculated by Trimble GPS receiver data in TGO software can be exported to a baseline file that can be recognized by Keshan GPS adjustment software. The specific operation method is shown in the following flow chart: then input according to the next picture and establish a new output format. Format title: CosaGPS of TGO format body: (Note: the contents of the format body must be entered on one line, with no carriage return in the middle. Please note, just copy and paste) 【 Start name: 8 】【 Arrival point name: 9】【X increment: 14.4】【Y increment: 14.4】【Z increment: 14.4 】【 Covariance XX:14.4 】 [Covariance XY: 16.9][ Covariance XZ: 16.9][ Covariance YZ: 16.9] After input, click OK to save the output mode in TGO software configuration file.