stellar magnitude

The stellar magnitude range of typical target is given to be 4 ~ m & 9 ~ m , the value is in agreement with measured result .

给出了典型目标的星等范围在4~m&9~m之间，这一结论与观测站所给数据基本一致。

The results show that the detectable stellar magnitude limits linearly increase with observing height and solar zenith angle .

结果表明：可探测星等极限值随观测高度和太阳天顶角的增加接近线性增加；

Analysis of the detectable stellar magnitude limit using CCD camera in daytime sky background

白天CCD观星可探测极限星等值分析

The method to estimate the detectable stellar magnitude limit in daytime sky background is introduced .

介绍了白天天空背景下，在大气层内用CCD探测恒星可探测极限星等值的计算方法。

The Response of the Photoelectric Detector and Its Influence on the Colour Correction of the Stellar Magnitude Determination

光电探测器的光谱响应与恒星星等测定的色改正

A higher detectable stellar magnitude limit is obtained by using longer wavelength bands for stars of K and M types .

对K和M类恒星，长波波段可探测星等极限值高。

The mathematic model of image pre-processing with a CCD system and the calculating method for measuring the stellar magnitude are presented in this paper .

本文介绍了CCD图象预处理的数学模型和测量恒星星等的计算方法。

For the case of 25 km observing altitude , the field of view of 3 °× 3 °, the maximum detectable stellar magnitude limit is 6.3 when the sun is out of 20 ° line of sight .

在25km高度、3°×3°视场、太阳视线20°以外，可探测星等极限值可达到6.3等。

Based on the results of the contrast of star to sky background in daytime , the detectable stellar magnitude limits are computed and analyzed as functions of observing heights , solar zeniths angle , wavebands and stellar spectral types for 3 °× 3 ° field of view .

根据恒星和白天大气背景辐射的对比度，计算和分析了3°×3°视场下，可探测星等极限值随观测高度、太阳天顶角、波段和恒星光谱类型的变化情况。