Method for detecting short message communication performance of Beidou first-generation user machine in external field

The invention belongs to the field of satellite navigation and satellite communication, and particularly relates to a method for detecting the short message communication performance of a Beidou first-generation user machine in an external field. The method comprises the steps that 1, in an external field environment, a test is conducted in the mode that a to-be-tested Beidou first-generation user machine sends and receives a short message automatically, and meanwhile for judging whether the short message is successfully sent or not, a satellite navigation signal radiated when the user machine sends the short message is monitored through a monitoring system formed by a spectrum analyzer and a receiving antenna; 2, the short message sending success rate and the short message receiving success rate of the to-be-tested user machine can be obtained according to test data; 3, short message loss reason positioning is conducted in a complete machine state. The method has the advantages that the test conditions are e