1、Overview of Remote Sensing杨龙龙 62100209韩会鹏 62100210崔 岩 62100224郑学法 62100225Overview of Remote Sensing1.Concept of Remote Sensing2.History of Remote Sensing3.Types of Remote Sensing4.Data Quality off Remote Sensing what does it mean?obtain qualitative and quantitative information without being in dire
2、ct physical contact specialized photographic camera systems optical-mechanical remote sensing detectors.The 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 reconn
3、aissance/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 SensingPassive Remote SensingActive Remote SensingObjectsSunRemoteSenorRadiationEnergyReflectedRadiationEmitRadiationPassive
4、Remote SensingObjectsRemoteSenorEmitRadiationReflectedRadiationActive Remote SensingSpatial resolutionSpectral 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 t
5、o square areas ranging in side length from 1 to 1,000 meters.0.5m10mThe wavelength width of the different frequency 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 sp
6、ectrum,ranging from a spectral resolution of 0.07 to 2.1 m.The Hyperion sensor on Earth Observing-1 resolves 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 performance index of the remote sensing image time interval.Also named as regression cycle.Fengyun-1CLandsat 7
