GB/T 44451-2024 in English
VALIDSatellite navigation and positioning sounding system—Radiosonde
- Issued on:2024-09-29
- Implemented on:2024-09-29
- File Format:PDF
- Delivery:Via email within 5 business days
$418.00
| Standard No: | GB/T 44451-2024 |
| Document status: | VALID |
| Title in English: | Satellite navigation and positioning sounding system—Radiosonde |
| Title in Chinese: | 卫星导航定位探空系统 探空仪 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Issued on: | 2024-09-29 |
| Implemented on: | 2024-09-29 |
| ICS Classification: | 07.060-Geology. Meteorology. Hydrology |
| Chinese Classification: | A47-Meteorology |
| Professional Classification: | GB-National Standard |
| Related Topics: | satellite navigation
sounding water level detection radiosonde water level detection satellite peak position oil level probe Instrument Blank scientific exploration satellite scientific exploration satellite Airborne geophysical prospecting cobalt satellite peak position low frequency detector satellite instrument satellite monitor space rover |
《GB/T 44451-2024卫星导航定位探空系统 探空仪》由TC507（全国气象仪器与观测方法标准化技术委员会）归口，主管部门为中国气象局。
Introduction
Analysis of standard technical framework
| Technical dimension | Climate observation requirements | Conventional observation requirements | Test methods |
|---|---|---|---|
| Temperature accuracy | ±0.2℃ | ±0.4℃(0-16km)/±0.8℃(>16km) | Constant temperature bath comparison method |
| Humidity accuracy | ±4% | ±5%(>-40℃)/±10%(-40~-60℃) | Dual pressure humidity generator |
| Positioning error | Horizontal ±8m/Vertical ±16m | Satellite signal simulator | |
Core technology innovation
Multi-mode satellite positioning technology: The standard requires that the sonde simultaneously support the GPS L1 (1575.42MHz) and BeiDou B1 (1561.098MHz±2.046MHz) frequency bands, and achieve fast positioning with a cold start of ≤2 minutes and a hot start of ≤10 seconds through a 16-channel receiver.
Dynamic quality control algorithm: For the first time, the triple quality control mechanism is explicitly required in clause 5.2.f: instantaneous value range check (such as humidity 0-100%), meteorological element physical limit check, and comprehensive logical judgment.
Key indicators of environmental adaptability
| Environmental parameters | Working conditions | Storage conditions | Test methods |
|---|---|---|---|
| Temperature | -90℃~+50℃ | -50℃~+60℃ | Temperature-pressure composite test chamber |
| Air pressure | 5hPa~1060hPa | - | Vacuum pressure simulation device |
| Mechanical vibration | 10-20Hz/29.4m/s² | 1000mm free fall | Electromagnetic vibration table |
Implementation suggestions
- Production quality control: It is recommended to establish a multi-point calibration system for temperature sensors (at least 10 test points). Refer to 6.6.1 and use a first-class standard platinum resistance thermometer (±0.02℃)
- Data protocol development: It is necessary to strictly follow the CRC-CCITT16 verification mechanism in Appendix A. It is recommended to use the 400.15-406MHz frequency band with an adjustable step size of 1kHz
- Environmental test optimization: The rain test should simulate a rainfall intensity of 100-150mm/h, combined with a temperature cycle test of -40℃~+50℃
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