1 Scope
This standard specifies the establishment of the arrangement principle, measurement method, precision index and technical requirements of GPS control network by virtue of the static global positioning system (GPS) survey technology.
This standard is applicable to the design, layout survey and data processing for the national and local GPS control network.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies.
GB/T 12897 Specifications for the first and second order leveling
GB/T 12898 Specifications for the third and fourth order leveling
GB/T 17942 Specifications for national triangulation
CH 1002 Specifications for inspection and acceptance of surveying and mapping products
CH 1003 Standard for quality assessment of surveying and mapping products
CH/T 1004 General rules for technical design of surveying and mapping
CH/T 2008 Specifications for construction of the continuously operating reference stations using global navigation satellite system
CH/T 8016 Specification for check off and test of GPS receiver of surveying model
3 Terms and Definitions
For the purposes of this standard, the following terms and definitions apply.
3.1
Observation session
The continuous observation time interval from the beginning to the end of receiving satellite signals on the survey station, hereinafter referred to as the session.
3.2
Simultaneous observation
Two or more receivers simultaneously observing the same group of satellites
3.3
Simultaneous observation loop
The closed loop constituted by the baseline vector obtained through the simultaneous observation by three or more receivers.
3.4
Independent observation loop
The closed loop constituted by the baseline vector obtained through the non-simultaneous observation.
3.5
Percentage of data rejection
In the same observation session, the ratio of the number of rejected observation values to the total number of obtained observation values.
