On-board compensation for temporal changes in pushbroom scanner detector arrays
Abstract
The design and operation of pushbroom and mechanical scanners are reviewed in order to determine differences in data preprocessing. Data preprocessing is categorized into spatial registration and radiometric corrections, as well as into systematic versus nonsystematic corrections. The category of nonsystematic radiometric errors due to temporal changes in detector array properties is emphasized as a subject of special interest and a challenging problem for onboard data preprocessing. Concepts for onboard compensation of temporal changes are presented. In particular one concept which uses dark current as an indicator of temperature change for determining gain and offset corrections is shown to have a number of advantages.
- Publication:
-
'Smart' Sensors
- Pub Date:
- November 1978
- Bibcode:
- 1978smse.conf.....J
- Keywords:
-
- Instrument Compensation;
- Multispectral Band Scanners;
- Onboard Equipment;
- Optical Correction Procedure;
- Remote Sensors;
- Time Dependence;
- Matrices (Circuits);
- Multispectral Photography;
- Optical Data Processing;
- Temperature Effects;
- Instrumentation and Photography