Scroll imaging of space TDI CCD remote sensing camera and optimazation of image location accuracy

SHI Jun-xia; LI Pei-yue; LI Hong-fa; GUO Yong-fei

doi:10.3788/YJYXS20142905.0777

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Scroll imaging of space TDI CCD remote sensing camera and optimazation of image location accuracy

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- Scroll imaging of space TDI CCD remote sensing camera and optimazation of image location accuracy
- Chinese Journal of Liquid Crystals and Displays Vol. 29, Issue 5, Pages: 777-784(2014)
- 作者机构：
  
  1. 中国科学院长春光学精密机械与物理研究所,吉林长春,中国,130033
  2. 中国科学院长春光学精密机械与物理研究所应用光学国家重点实验室,吉林长春,130022
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20142905.0777
  CLC： V445.8
- Received：15 February 2014，
  
  Revised：26 February 2014，
  
  Published：05 October 2014
- 稿件说明：
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石俊霞, 李佩玥, 李洪法, 郭永飞. 遥感TDICCD相机侧摆成像及定位精度优化[J]. 液晶与显示, 2014,29(5): 777-784

SHI Jun-xia, LI Pei-yue, LI Hong-fa, GUO Yong-fei. Scroll imaging of space TDI CCD remote sensing camera and optimazation of image location accuracy[J]. , 2014,29(5): 777-784
石俊霞, 李佩玥, 李洪法, 郭永飞. 遥感TDICCD相机侧摆成像及定位精度优化[J]. 液晶与显示, 2014,29(5): 777-784 DOI： 10.3788/YJYXS20142905.0777.

SHI Jun-xia, LI Pei-yue, LI Hong-fa, GUO Yong-fei. Scroll imaging of space TDI CCD remote sensing camera and optimazation of image location accuracy[J]. , 2014,29(5): 777-784 DOI： 10.3788/YJYXS20142905.0777.

摘要

为了满足空间遥感TDICCD相机侧摆成像时对图像定位精度的要求，提出了一种侧摆成像时图像定位精度优化方法。首先，根据遥感TDICCD相机的工作原理计算了星下点成像和侧摆成像2种模式下的行周期值。然后，在分析了侧摆成像会导致一段时间内出现定位误差太大的原因的基础上，介绍了利用记录3种信息：行周期信号上升沿时刻、行同步信号上升沿时刻和二者之间时间差来对图像进行定位的方法。最后，计算了提出方案的定位误差。实验结果表明，在一次成像过程中，产生的定位误差小于地面像元分辨率大小，能满足系统对于图像定位精度的要求。

Abstract

In order to satisfy the requirerment of image location accuracy for space TDICCD remote sensing camera at scroll imaging

a method of improving image location for scroll imaging is proposed. First

based on the principle of TDICCD remote sensing camera

the line period in normal imaging mode and scroll imaging mode is calculated respectively. Then

the reason is analyzed that image location error would be too large in scroll imaging mode after working a period of time

and the method of calculating the image location error is introduced by record three kinds of data: ringing edge time of line cycle signal

ringing edge time of line synchronous signal and the time difference between the above two signals. Finally

image location error is calculated. Experimental results indicate that the image location error is less than ground sample distance in an imaging process. It can satisfy the system requirement on image location accuracy.

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references

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