(1) GPS receiver selection should be consistent with the requirements of Table 3-4.
Table 3-4 GPS receiver selection requirements
(2) GPS receiver inspection includes the following: general inspection, power test, measurement test.
General inspection: the receiver and antenna model should be correct, the host and accessories should be complete. The appearance of the receiver and antenna should be good, the parts and accessories should be intact, and the fastening parts should not be loose and fall off. Equipment manual and post-processing software manual should be complete.
Power test: the power signal lamp should work normally, the use of self-test commands to test, test the receiver to lock the satellite time fast and slow, receive signals strong and weak and out of lock.
The actual test: the receiver internal noise level test. Receiver antenna phase center stability test. Receiver different precision indicators of the test should be carried out in different lengths of the standard baseline or standard calibration field. High and low temperature test. The optical point aligner of the antenna base should be checked frequently during the operation to ensure the correctness of the alignment. The actual test can be handed over to the mapping instrument qualification organization to ensure that the instrument is used within the effective trial period.