【摘要】 对于不以地球为探测对象的空间遥感器来说，地球是一个扩展杂光光源．本文给出了适用于微机的计算方法．根据辐亮度守恒原理用平面取代地球表面后，用分块成面元的方法计算许多不同入射角的点源的杂光贡献，整个扩展源的杂光贡献即为它们的总和．实例计算表明，对于低轨道的遥感器，必须十分重视地球的杂光影响．更多还原

【Abstract】 For many space remote sensors, the earth is an important extended source of stray light. An algorithm suited for use on PC computer to calculate this kind of stray light is described. The earth surface is substituted by plane area according to the radiance conservation theorem. Then the plane arm is divided into elements, and they are treated as point sources with different incident angles. The earth’s contribution is the sum of those of the plane elements. The prediCtions of a typical systems on two typical orbital altitudes show that, the stray light due to the earth scattering for low orbital sensors should be carefully deal with.更多还原