GB/T 18314-2024 in English
VALIDSpecifications for survey and measurement of global navigation satellite system
- Issued on:2024-08-23
- Implemented on:2025-03-01
- File Format:PDF
- Delivery:Via email within 8 business days
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《GB/T 18314-2024全球导航卫星系统（GNSS）测量规范》由TC230（全国地理信息标准化技术委员会）归口，TC230SC2（全国地理信息标准化技术委员会测绘分会）执行，主管部门为自然资源部(测绘地理)。
Introduction
Analysis of the core content of the standard
Technological evolution and major updates
Compared with the 2009 version, the 2024 version of the standard has the following major upgrades:
- The name of the standard is expanded to Global Navigation Satellite System (GNSS) Measurement Specification
- Added special measurement requirements for the Beidou system (Clause 4.1, 10.1.2)
- Using Point mean error as the basis for accuracy classification (5.3.2)
- Added the calculation formula for the mean error of baseline measurement (12.2.5)
Accuracy level classification system
| Level | Horizontal component error (mm) | Vertical component error (mm) | Purpose |
|---|---|---|---|
| Grade A | ≤2 | ≤3 | Global Geodynamics Research |
| Grade B | ≤5 | ≤10 | Regional deformation monitoring |
| Grade C | ≤10 | ≤20 | Urban benchmark framework |
Instrument and Equipment Requirements
Class B network receiver must meet the following requirements:
- Multi-mode and multi-frequency (supports Beidou/GPS, etc.)
- Carrier phase observation accuracy ≤3mm+0.5ppm
- Equipped with choke antenna
Meteorological instruments need to be calibrated regularly, and the measurement range of ventilation psychrometer is -10℃~+45℃ (Appendix C)
Key technologies for synchronous observation
Baseline solution quality indicators:
- Data rejection rate ≤20% (Class A/B)
- Asynchronous loop closure error ≤3√nσ (n is the number of edges)
- Multipath effect value <0.5m
Using RINEX 3.04 format to store raw data (12.3.1)
Implementation suggestions
Key points for marker stone burial
- Center mark error of bedrock marker ≤2mm (8.2.3)
- Frozen areas must go through one freeze-thaw period to stabilize (8.2.7)
- The marker stone is imprinted with a warning sign of "National Facility" (8.3.1)
Data processing flow
- Baseline solution: A/B level must use precise ephemeris
- Network adjustment: 2000 National Geodetic Coordinate System as the benchmark
- Result acceptance: Implemented in accordance with GB/T 24356
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