THE APPLICATION OF SATELLITE POSITIONING TECHNOLOGY AND ITS INDUSTRIALIZATION IN CHINA

Satellite positioning technology has been widely used in all kinds of military and civil land, marine, space and aeronautical target positioning tasks, naviga tion activities and accurate surveying measurements since 90 s in the last cen tury due to its advantage in providing all-weather, real-time, three dimensional and high precision positioning information, as well as speed and accurate timing information. By now, it has already formed a new hi-tech industry basically.This paper briefly reviews the development of the global satellite positioning and navigation technologies including the basic information of China's "Plough navigation system", introduces the history of satellite positioning technology and its major application fields as well as the status quo of this being industri alized trade in China, gives an account of the writers' vision for the application and prospect of the satellite positioning technologies in China, and approaches the tactics and stresses of the satellite positioning technology's application and its industrialization future in China.     

总温传感器动态特性的方向敏感性研究

讨论了气流方向对一种机载总温传感器动态特性的影响，发现气流偏角对传感器的动态特性有很大的影响，首次提出了总温传感器动态特性的方向敏感性概念。本文分析了其原因，并指出在设计、生产和使用过程中控制气流偏角的大小，否则将破坏传感器的动态性能。这一结论也适用于与结构类型相似的其它总温传感器。     

利用天狼星(SIRIO-1)卫星进行的Ku波段电波传播实验

1983—1984年中国和意大利进行天狼星(SIRlO-1)卫星联合实验,本文报导北京地球站所进行的电波传播实验的主要结果。其中包括:11.5GHz下行雨致衰减、17.1GHz/11.5GHz上下行雨致衰减的相关关系,衰减变化率,微波辐射计和信号闪烁等。所获得的结果对我国发展Ku波段通讯或广播卫星系统有参考意义。     

医用低成本小压差传感器的研制

本文介绍了医用压力参数测试的意义和特点。明确指出,为了广泛应用,降低成本是关键之一,文章重点讲述了结构设计、工艺技术、装配调试等研制过程中的主要技术问题和解决方法。最后对存在的问题和改进措施进行了讨论。     

X形测力元件标准测力仪

介绍一种配置了分辨力为 0 .1μm的光栅位移传感器作为测量装置的标准测力仪。     

在航天遥感器产品中推广与应用SMC/SMD产品和SMT技术

文章介绍了SMC/SMD器件和SMT技术在世界的发展状况和国内的应用概况,论述了航天遥感器在今后的设计中推广与应用SMT技术的重要性和必然性以及应用SMC/SMD器件需创造的条件。     

Remote sounding of atmospheric gravity waves with satellite limb and nadir techniques

Recent advances in satellite techniques hold great potential for mapping global gravity wave (GW) processes at various altitudes. Poor understanding of small-scale GWs has been a major limitation to numerical climate and weather models for making reliable forecasts. Observations of short-scale features have important implication for validating and improving future high-resolution numerical models. This paper summarizes recent GW observations and sensitivities from several satellite instruments, including MLS, AMSU-A, AIRS, GPS, and CLAES. It is shown in an example that mountain waves with horizontal wavelengths as short as 30 km now can be observed by AIRS, reflecting the superior horizontal resolution in these modern satellite instruments. Our studies show that MLS, AMSU-A and AIRS observations reveal similar GW characteristics, with the observed variances correlated well with background winds. As a complementary technique, limb sounding instruments like CRISTA, CLAES, and GPS can detect GWs with better vertical but poorer horizontal resolutions. To resolve different parts of the broad GW spectrum, both satellite limb and nadir observing techniques are needed, and a better understanding of GW complexities requires joint analyses of these data and dedicated high-resolution model simulations.     

同步卫星天线反射器的真空非均匀温度模拟试验与分析

本文介绍了同步卫星天线反射器在真空非均匀温度场的变形试验技术及其测量结果。为了实现在反射器上达到低温-150℃、高温120℃,采用了太阳模拟器与红外加热笼综合加热、液氮致冷以及设置各种反射板的方法,获得了较大的温度梯度,使模拟效果较为满意。试验中模拟了太阳照射的四种工况,相应地测量了反射器上的温度与应变分布,并计算了热变形与位移值。该结果对卫星天线结构设计与分析有一定的参考价值。     

Bluetooth无线接入技术及其应用

本文首先讨论了蓝牙 (Bluetooth)技术的基本概念 ,然后分析了蓝牙无线接入控制技术的特点 ,并对蓝牙无线接入技术存在的问题及发展方向提出了自己的见解     

CBERS-1卫星红外多光谱扫描仪主光学装置设计

文章介绍了CBERS -1卫星IRMSS主光学装置的设计 ,叙述了光学系统和结构选择、装配调试、像质的稳定性、可靠性问题。该装置在焦面Φ8mm范围内弥散园优于Φ0.010mm ,调制传递函数MTF优于0.91。