(遥感专业英语)Overview of Remote Sensing.ppt

The Concept of Remote Sensing what does it mean? obtain qualitative and quantitative information without being in direct physical contact specialized photographic camera systems optical-mechanical remote sensing detectors. RS Feature Dynamic monitoring , Update quickly Large amount of information, Diverse techniques Wide application field, high economic efficiency Macroscopic observation, large-scale data acquisition Less constraint Type of Remote Sensing Type of Remote Sensing DATA QUALITY Spatial resolution The size of a?pixel?that is recorded in a?raster image?– typically pixels may correspond to square areas ranging in side length from 1 to 1,000 meters. Spectral resolution The wavelength width of the different frequency bands recorded – usually, this is related to the number of frequency bands recorded by the platform.? Spectral resolution Radiometric resolution The number of different intensities of radiation the sensor is able to distinguish. Temporal resolution A performance index of the remote sensing image time interval. Also named as regression cycle. THANK YOU ! Overview of Remote Sensing 杨龙龙韩会鹏崔 岩郑学法 Overview of Remote Sensing 1.Concept of Remote Sensing 2.History of Remote Sensing 3.Types of Remote Sensing 4.Data Quality off Remote Sensing RS System 传感器 Data transmission Products application field investigation Analysis to determine 地面物体 electromagnetic properties of the material and the environment converted to an image of digital form. Remote sensor The History of Remote Sensing Overview of Remote Sensing The first known aerial photograph was obtained from a tethered balloon 1,700-ft. above Paris, France in 1858. balloons pigeons 1903 The TR-1 reconnaissance/surveillance aircraft. The 2001 Mars Odyssey used spectrometers and imagers to hunt for evidence of past or present water and volcanic activity on Mars. Type of Remote Sensing Passive Remote Sensing Active Remote Sensing Objects Sun R