关于卫星遥感影像时间分辨率的解析

Analysis of Temporal Resolution of Satellite Remote Sensing Images

通过解释概念及计算,理清了时间分辨率与运行周期、重复周期和重访周期的关系。结果表明:从概念上看时间分辨率与重访周期一致。对于静止轨道卫星,对固定区域进行连续观测,具有较高的时间分辨率。对于太阳同步轨道卫星,一般重访周期等于重复周期;若卫星具有侧视能力,或影像刈宽远大于轨道间隔,或卫星组网,重访周期小于重复周期,提高了时间分辨率。

Based on concept and calculation,the relationship between temporal resolution and revolutionary period,repetition period,revisit period is clarified.The results show that temporal resolution is almost identical to revisit period in concept.For the geo-stationary orbit satellites,continuous observation of the fixed area makes its highest temporal resolution.For the sun-synchronous orbit satellites,revisit period is generally equal to the repetition period.If the satellite has lateral vision ability,or the image cutting width is far greater than the orbit interval,or the satellite network is formed,revisit period will be less than repetition period,and temporal resolution is improved.