Qnh is the pressure at mean sea level , reduced from qfe by applying corrections according to the international civil aviation organisation s standard atmosphere Qnh是海平面气压，根据国际民航组织所订立的标准大气将qfe转换而成。
The results show that laser beam far field intensity deflect to the wave length increasing direction about 0 . 2m ~ 0 . 3m when beam pass through flow field and propagate 1km in static atmosphere . high - power laser beam will have thermal booming effect when it pass through gas flow field 研究表明由于流场中存在强的激波结构，使得激光束远场强度分布向光程增大的方向发生了强的偏折，在光束通过流场在标准大气中传播1km后，偏折达到0 . 2m 0 . 3m 。
The surface solar total radiation is first calculated when albedo is fixed under clear - sky varying atmospheric conditions by using the radiation transfer model and the model atmosphere profile of the middle latitude summer , and a parameterization scheme is then proposed based on the result 首先利用辐射传输模式和中纬度夏季标准大气廓线，分谱带计算晴天各种大气条件下地表反射率取定值时的地表太阳总辐射，并把所得的结果作为标准资料，提出参数化方案。
This article introduces the design and implement of flight simulator based on dsp which contains five parts . the first part establishs the math model of flight simulator which contains the model of aerodynamics and flight mechanics , the model of standard atmosphere and wind model ; the second part introdces primarily the arithmetic of numeric integral which is very important to dyanmic system simulant . the third part introduces the design of hard interface circuit and program . the fourth part introduces the data flow graph of the flight simulator software and gunge - kutta integral arithmetic . the finall part introduces the design of serial port communication software , it contains communication protocol , the process of upper machine and lower machine communication and the programing of serial port communication by vc + + 本文介绍了基于dsp的飞行器模拟器设计与实现，主要分为五个部分，第一部分建立了飞行仿真的数学模型，包括飞行器空气动力学和飞行力学的数学模型、标准大气模型和风模型；第二部分主要介绍了数值积分算法，它在动态系统仿真中是很重要的；第三部分为硬件接口设计与编程；第四部分介绍了气动仿真软件的数据处理流程和runge - kutta积分算法；最后一部分为串口通信软件设计，介绍了通信协议、上下位机处理流程和vc + +串口通信编程。
Based on the response theory of an elastic earth to surface loads and the model of the standard atmosphere , the characteristics of changes in the loading effects with time , space and frequency are comprehensively investigated in this dissertation . the numerical results obtained in this study can provide accurate atmospheric correction models for high - precision continuous measurements of the geophysical fields such as gravity , tilt , displacement and strain on the earth ' s surface 本文基于弹性地球对表面负荷的响应理论和标准大气模型，综合研究大气负荷效应的时间、空间和频率特征，为地表重力、倾斜、位移和应变等物理场的高精度连续观测提供精密大气影响改正模型
