遙感概論課件：Mid-infrared emissivity and reflectivity isolation and temperature inversion

1、Mid-infrared emissivity and reflectivity isolation and temperature inversion1 Project backgroundAll weather identificationMWIR Features：Have the visible - near infrared reflectance characteristics and long-wave infrared spectral emission characteristicsNot affected by the smoke, fog, dust, snowAble

2、to adapt to long-range, day and night working environment poor smoke penetratinginsufficient light, poor contrast23Separation emissivity and reflectivityMWIR-orbit calibrationMWIR temperature inversionSeparation emissivity and reflectivitythe basis work of the scaling and temperature inversion4The e

3、xperimental principle: method of day and night+Reflection energyEmission energyAssume that day and night than the ratio of the radiation rate unchangedThe infrared radiation during the dayPlancks formula, the atmospheric attenuationThe infrared radiation at nightreflection of the suns energyMODTRAN

4、atmospheric transmission simulation calibrationWork in progress5 have been completedunfinished1. The model building2. The theoretical analysis3. Indoor data analysis4. The field experiment and preliminary analysis of the data1. The analysis and processing of emissivity and reflectivity2. The tempera

5、ture inversion processing3. The conclusionsThe new sensor5Dispersion sensor (developed by The Shanghai Institute of Technical Physics, 3.7 4.8 um, single channel)Objective: to realize the data of the infrared radiation spectrum and spectral reflectance data separationLocation: Shanghai technical ins

6、titute of physicsThe experiment date: 09.01 to 09.05Methods: day and night observation (8:00-15:00 during the day; the night 1:00-3:00)Environment: the outdoor environment (atmospheric environmental measuring exposed)Data collection interval: measurement about every 1 hours during the day, each time

7、 the data volume five or more; About once every half hour test at night, every time a data volume five or moreExperimental features: due to the limitation the experiment site, choose the pool, gravel roads, lawn, soilMedium wave infrared data acquisition experiment7displayMid-infrared cameraSpecial

8、computerCamera PowerThe experimental results - the water8Branches reflectionWater body can often be used as a standard source. Good stability, in doing the experiment, the water in the daytime and nighttime minimum differencesNight (2:00)Daytime (12:00)9Experimental resultVegetationsDaytime（12:00）Ni

9、ght（2:00）Stripe noisesStripe noises :because of no Background Noise CancellationExperimental resultGravel10GravelDaytime（12:00）Night（2:00）According to the comparison between Daytime and Night, the grayscale at day is bigger than that at night. Analyze and contrast the emission characteristic of the

10、MIR typical surface features.11The stability of new instrument should be increased（Blind Source(Discovery？Solution), Refrigeration, The detector （ The multichannel, Monochromatic ), Data acquisition system ）Both of the time and number of the data acquisition are not meetting the requirements of the

11、experimental scheme(The stability of instrument, the experiment site, the weather)The experimental defectsDiscussion1There are deferences of grayscale between day and night；There are emission and reflection characteristics at day, but only reflection characteristic at night ；insulate the reflectivity from the emissivity of MIR.12Discussion2In theory, the method of day and night is feasible,