GPS与北斗双模授时的压控晶振校频系统设计-GPS and Compass mode voltage-controlled crystal oscillator timing and frequency calibration system

GPS方位标定与目标遥测系统 XW-ADU3603 用户手册，专门配合激光测距机使用-GPS telemetry system with the target calibration position XW-ADU3603 user manual, specifically with the use of laser range finder