What is the accuracy of the national GPS specification?

5. 1GPS survey is divided into AA, A, B, C, D and E levels according to its accuracy.

GPS fast static positioning measurement can be used for the layout of c, d and e GPS control networks.

5.2 Use of GPS survey at all levels:

Class AA is mainly used for global geodynamics research, crustal deformation measurement and precise orbit determination.

Class A is mainly used for regional geodynamics research and crustal deformation measurement;

Class B is mainly used for local deformation monitoring and various precision engineering surveys;

Class C is mainly used for basic control network and engineering survey in large and medium-sized cities.

Grades D and E are mainly used for control surveying and mapping, cadastre, land information, real estate, geophysical prospecting, survey and construction in small and medium-sized cities and towns.

AA, class a. It can be used as the basis for establishing the geocentric reference frame.

AA, A and B grades can be used as the basis for establishing the national space geodetic control network.

5.3 The accuracy of baseline length of adjacent points of GPS networks at all levels is expressed by the following formula, and is implemented according to table 1.

Introduction:

According to the principle of static and fast static positioning, the principle, classification and operation method of establishing survey control network (GPS control network for short) by using global positioning system (GPS) are stipulated in the national GPS specification.

People's Republic of China (PRC) national standard

Global positioning system (GPS) measurement specification GB/T18314-2001[1]?

Global positioning system (GPS) survey specification