GB/T 27606-2020 in English
VALIDGNSS receiver independent exchange format
- Issued on:2020-12-14
- Implemented on:2021-04-01
- File Format:PDF
- Delivery:Via email within 10 business days
$961.00
《GB/T 27606-2020GNSS接收机数据自主交换格式》由TC544（全国北斗卫星导航标准化技术委员会）归口，主管部门为中央军委装备发展部。
Introduction
Background of Standard Revision and Technological Evolution
As an important basic standard in the GNSS field, GB/T27606-2020 reflects the latest developments in the global satellite navigation system:
| Technical Dimensions | 2011 Edition | 2020 Edition | Key Points of Evolution |
|---|---|---|---|
| Supported Systems | 5 | 7 | Newly Added QZSS/IRNSS Systems |
| Definition of Terms | 14 items | 16 items | Add carrier phase observation value/inter-symbol deviation |
| Time system | UTC/GPS | Multi-system time | Strengthen BeiDou Time (BDT) application |
Core terms and technical parameters
Analysis of key definitions
Pseudorange observation: obtained by measuring the product of signal propagation time difference and the speed of light by GNSS receiver, including geometric distance and clock error terms (Section 3.1.1)
BeiDou Time (BDT): an independent time base with UTC January 1, 2006 as the starting point, and the accuracy is maintained within 50ns (Section 3.1.4)
Observation parameter comparison
| Observation type | Recording format | Correction method |
|---|---|---|
| Pseudorange(5.1.2) | F14.3 | System time difference correction(5.2.1) |
| Carrier phase(5.1.3) | F14.3 | Phase calibration(5.3.4) |
| Doppler(5.1.4) | F14.3 | Receiver clock correction(5.2.2) |
File structure and implementation points
File naming conventions (4.1.4)
Use a nine-segment structure:
Name_S_StartTime_Period_DataFreq_DataType.Format.Compression
Example: BJFS00CHN_20213561200_01H_30S_MO.rnx.gz represents multi-system observation data sampled at Beijing Fangshan Station for 1 hour and 30 seconds
Data recording requirements
- Each line is fixed at 80 characters (4.1.3)
- The header must contain the antenna phase center deviation correction (5.3.11)
- Meteorological data needs to be marked with the sensor type (7.2)
Implementation suggestions
Multi-system data processing
For BDS/GPS/GLONASS mixed data:
- Give priority to the use of a unified time base (BDT is recommended)
- Pay attention to the DCB correction of different systems
- The navigation file needs to distinguish the system identifiers (C/E/G, etc.)
Quality control
It is recommended to verify the data validity through the following parameters:
| Signal-to-noise ratio (5.4.2) | ≥35dB-Hz |
| Clock correction (5.2.2) | Within ±1ms |
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