摘要
根据太阳辐射传输理论,对一星载近红外激光高度计样机在轨运行时,不同的姿态所受到的太阳辐照进行了分析.该激光高度计的工作波长为1064nm.结合激光高度计样机的系统灵敏度,分析得到在激光高度计正常工作时,系统所接收到的星球表面漫射的太阳辐照产生的背景噪声约是系统灵敏度的十分之一,对系统的影响可以忽略.根据雪崩二极管的损伤阈值以及太阳直接辐照时到达探测器的太阳辐照,得到在空间没有任何保护措施的情况下,雪崩二极管所能承受的太阳直接辐照持续为4 s.根据分析所得结果,提出了改进措施,为系统的进一步完善提供了依据.
Solar radiation received by a spaceborne near infrared laser altimeter prototype on orbit with various attitudes was analyzed based on the radiation theory. The working wavelength was 1064nm. With the system responsivity, the solar radiation reflected hy the star surface and received by the laser altimeter when it is working at the normal mode was discussed. And the background noise caused by this radiation was about ten times smaller than the system responsivity and its effect on the system can be neglected. According to the damage threshold of the APD, the solar radiation that directly irradiates the system was analyzed. And the duration of the APD to this radiation in space without any protection on it is 4s.
出处
《红外与毫米波学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第6期426-428,共3页
Journal of Infrared and Millimeter Waves
基金
上海市科委计划(045115018)资助项目
关键词
近红外激光高度计
太阳辐照
背景噪声
损伤阈值
near IR laser altimeter
solar radiation
background noise
damage threshold.
