.遥感专业英语.Overview of Remote Sensing

1、 what does it mean? obtain qualitative and quantitative information without being in direct physical contact specialized photographic camera systems optical-mechanical remote sensing detectors. 传感器Data transmissionProducts applicationfield investigation Analysis to determine地面物体electromagnetic prope

2、rties of the material and the environment converted to an image of digital form.Remote sensor Dynamic monitoring , Update quickly Large amount of information, Diverse techniques Wide application field, high economic efficiency Macroscopic observation, large-scale data acquisition Less constraintThe

3、History of Remote SensingOverview of Remote SensingThe first known aerial photograph was obtained from a tethered balloon 1,700-ft. above Paris, France in 1858. balloonspigeons1903The TR-1 reconnaissance/surveillance aircraft.The 2001 Mars Odyssey used spectrometers and imagers to hunt for evidence

4、of past or present water and volcanic activity on Mars.Type of Remote SensingPassive Remote SensingActive Remote SensingObjectsSunRemoteSenorRadiationEnergyReflectedRadiationEmitRadiationPassive Remote SensingObjectsRemoteSenorEmitRadiationReflectedRadiationActive Remote SensingSpatial resolutionSpe

5、ctral resolutionRadiometric resolutionTemporal resolutionThe quality of remote sensing data consists of itsThe 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. 10mThe wavelength width of the different fr

6、equency bands recorded usually, this is related to the number of frequency bands recorded by the platform. Current Landsat collection is that of seven bands, including several in the infra-red spectrum, ranging from a spectral resolution of 0.07 to 2.1 m. The Hyperion sensor on Earth Observing-1 res

7、olves 220 bands from 0.4 to 2.5 m, with a spectral resolution of 0.10 to 0.11 m per band. The number of different intensities of radiation the sensor is able to distinguish. Typically, this ranges from 8 to 14 bits, corresponding to 256 levels of the gray scale and up to 16,384 intensities or shades of color, in each band. A