Research And Application Development Of Low Altitude Digital Radiosonde

The low-altitude digital radiosonde can measure the atmospheric parameters such as temperature,relative humidity,atmospheric pressure and so on,and calculate the low-altitude atmospheric refractive index.It provides important data parameters for low-altitude atmospheric wave guide diagnosis system.Low altitude atmospheric wave guide diagnosis system can effectively diagnose the existence of low-altitude atmospheric wave guide.Low-altitude atmospheric wave guide can make the radio system blind spot,but also to achieve the carrier-based radar over-the-horizon transmission and over-the-horizon detection.Therefore,in order to rational use of low-altitude atmospheric wave guide,research and development of low-altitude digital radiosonde has important scientific significance and application value.Based on the research and development of digital radiosonde at home and abroad,this paper introduces the advanced research results at home and abroad,and introduces the development of low altitude digital radiosonde from hardware design and software design respectively according to the practical application requirements.The hardware design is divided into two parts:the collecting plate and the launching plate.The collecting board mainly uses the high-precision meteorological sensor to measure the temperature,relative humidity and atmospheric pressure of the low-altitude atmosphere and measure the wind speed and wind direction in the atmosphere with the Beidou satellite navigation and positioning technology.The launch pad is mainly used in low-power wireless transmitter chip,the use of crystal oscillator frequency synthesis technology,through the omnidirectional copper wire antenna sounding data sent to the digital receiver,in order to achieve low-level digital radios are all digital.Software design can be divided into radiosonde application software and PC software in two parts.The radiosonde application is primarily for data acquisition and processing of the sensor signal,and then the data is sent according to the set sampling period.PC software is mainly Visual Studio 2010 development platform using C#language to achieve real-time weather data display,data preservation.At the end of this paper,the system performance test of low altitude digital radiosonde is introduced,and the performance analysis is carried out according to the test data.System performance testing is mainly from the sensor environment test,static performance comparison test,dynamic performance comparison test to analyze the performance of low-altitude digital radiosonde,and through field flight experiments and VAISALA RS92 radiosonde performance comparison.The low-altitude digital radiosonde shows that the system has the advantages of high precision,small volume,light weight,low power consumption and low cost through static and dynamic test,and the system has passed EMC test.