基于微型固定点在现场附近转移的空间温度可追溯性
Ruiheng Sima1,2,3, Xiaopeng Hao4,5, Jian Song1,3
1Remote Sensing Calibration Laboratory, National Institute of Metrology, Beijing, China.
Communications engineering
|May 5, 2025
概括
准确的长期遥感依赖于稳定的太空辐射校准. 这项研究引入了一种新的空间温度可追溯技术,使用微型固定点进行精确,连续的轨道校准,提高监测精度.
科学领域:
- 空间物理和遥感仪器仪表.
- 计量学和校准技术.
- 用于极端环境的材料科学.
背景情况:
- 长期远程传感精度需要实时辐射校准.
- 太空校准器在恶劣的太空环境中面临着稳定性和准确性的挑战.
- 微型固定点为空间辐射值提供了国际单位系统的可追溯性,但现场方法在位置不匹配方面遇到了困难.
研究的目的:
- 展示一个空间温度可追溯技术,用于连续的,所有位置的自我校准.
- 在固定点,黑体和远程传感器之间建立传输链路.
- 为长期遥感提供有效的轨道可追溯性.
主要方法:
- 开发了一个近场转移机制,利用相位过渡特征进行温度自校准.
- 建立了一个可追溯链,连接固定点,太空黑体和远程传感器.
- 在234 K至345 K的温度范围内部署了八个微型固定点.
主要成果:
- 实现了分别6.0mK和3.2mK的重复性和长期稳定性.
- 展示了最新的太空黑体,首次在轨道上复制7.4mK.
- 在不同地点验证了连续温度自我校准技术.
结论:
- 展示的空间温度可追溯技术可以在轨道上进行有效的校准.
- 这种方法克服了空间辐射监测的传统现场方法的局限性.
- 该技术提高了长期遥感任务的准确性和可靠性.
相关概念视频
Distance Corrections
23
To achieve precise distance measurements, especially in surveying and construction, certain corrections must be applied to account for potential sources of error like the standardization errors, temperature variations, and slope adjustments.Standardization error emerges when measurement equipment undergoes changes, such as wear, repairs, or weather impacts. To address this, surveyors compare the equipment’s readings to a standard. This process identifies any deviation that might lead to...
23
Temperature Measurement Sites
1.4K
A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
1.4K
Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device
14
Surveyors use Global Positioning System (GPS) technology to measure the precise location and elevation of points on Earth. In a recent survey, GPS receivers were used to determine the coordinates and elevations of two park monuments. The process involved careful mission planning, data collection, and correction to ensure accuracy. The survey began with mission planning to identify optimal satellite visibility and minimize Position Dilution of Precision (PDOP). A geodetic control point...
14


