By using the continuous observational data of air,radiation and soil from two sites of automatic weather station(AWS) at Gaize and Shiquanhe on the western Qinghai-Tibet Plateau in the period from October 1997 to November 1998,the diurnal variations of surface albedo in summer and winter are analyzed.

Based on the solar radiation data from 14 representative obscrvatorics in China between 1986 and 1990,the relationship between the surface albedo and some meteorological factors such as temperature,humidity,rainfall and snowfall are analyzed.

In the case of ground reflection, a monopole with finite diameter is studied by method of moment (MoM).

This paper analyses effects to the DBF of meterwave antenna due to the good ground reflection characteristic of meterwave antenna,under the conditions of ground elevation being positive and negative,and makes futher ananlysis of the beam power between the range 1~30 elevation angle with certain distance between barrier and antennae using Matlab.

The surface reflectivity of Kevlar/epoxy doesn′t change when there are no chemical and physical changes of the composite reinforcced by polyaryl amide fibers irradiated by laser beam.

By ratio operation of light intensity of different receiving optical fibers,the effect of tip surface reflectivity variation on measurement results is eliminated,it can as well as reduce.

According to radiative transfer equation,the elements of sea surface which exert impact on the brightness temperature include primarily the microwave radiation from sea surface and the reflection of downwelling atmospheric radiation,the key parameters among them are emissivity and reflectivity of sea surface.