The rapid development of GPS navigation and satellite positioning technology and the continuous expansion of application fields have prompted all parts of the world to attach great importance to the research and development and production of GPS receivers. There are currently dozens of GPS receiver manufacturers in the world, and there are hundreds of receiver models and specifications. There are various classifications of GPS receivers for different observing stations.
(Beitian GPS receiver BP-582U)
1. Classification according to satellite signals received by the receiver
The number of satellite signals received by the receiver can be divided into code phase difference receivers, single frequency receivers (L1), single frequency receivers (L1, L2) and transmission gate receivers.
(1) Code phase difference receiver: C/A code and P code are used as laser ranging signals. Although the navigation message is used to give parameter values and adjust the tropospheric mapping effect on the observation volume, due to the C/A code, The accuracy of P code laser ranging is weak. Therefore, code phase difference receivers are mainly used in navigation bar-type handheld low-precision receivers.
(2) Single frequency receiver: can receive the prepared L1 carrier signal. At this time, although the navigation message is used to give parameter values and adjust the tropospheric mapping impact on the observations, the accuracy is weak because the adjustment model is not yet complete. Therefore, single-frequency receivers are mainly used in high-precision positioning and navigation where the baseline is relatively short (not exceeding 20km).
(3) Single frequency receiver: can receive L1 carrier communication and L2 carrier signals at the same time. The performance of single-frequency technology eliminates or greatly weakens the impact of tropospheric mapping on observations, so high-precision positioning conclusions can still be obtained on long baselines.
(4) Portal receiver: Receive GPS communication satellite ranging code data signal and wireless communication pointer-differential signal satellite navigation system data signal at the same time. Therefore, within a range of 300Km2, a 13-meter tracking and positioning conclusion can still be obtained. Portal receivers are mainly used for GPS navigation of ships on the water in areas covered by wireless communication beacons in coastal cities.
2. Classification by reception
(1) Single satellite system: A satellite signal receiver generally capable of tracking only one satellite navigation and positioning system. Mainly include GPS receivers, GLONASS receivers, Beidou system receivers, etc.
(2) Double-star system: a satellite signal receiver capable of tracking two satellite navigation and positioning system software. Mainly include GPS\GLONASS integrated receivers.
(3) (Multi-satellite system software: satellite signal receiver capable of tracking two or so satellite navigation and positioning systems. Mainly GPS\ GLONASSEGNOS integrated receiver
3. Classification according to the operation mode of the receiver
(1) Static data receiver: a receiver with standardized static data and fast static data functionality
(2) Dynamic receiver: a receiver with dynamic, quasi-dynamic performance and real-time differential signal technology.