Study On The Near Ground Temperature From Aerial Shots In Low Altitude

Urban thermal environment is closely related to the human’s production and living. Lowaltitude infrared remote sensing has the advantages: macro, timely and fast. It has obviouslyadvantage to research the urban thermal environment. Experiment is the main technologicalmean in this paper to research on the near ground temperature from aerial shots in low altitude,with other means such as: literature research, numerical fitting, numerical comparisons,empirical regression and check analysis. The near ground temperature main contain surfacetemperature, near ground air temperature and surface bright temperature. This paper mainlyundertook the following work:(1) The surface temperature and the air temperature1.5m high measurements aredesigned to be held at the same time. Analyze the variation trend and correlation of the twokinds of temperature. The result prove that they have different grade linear correlation morethan significant related. Analyze the feasibility and the method of working-out near ground airtemperature based on the low-altitude aerial remote sensing data.(2) The shooting experiment by the thermal infrared imager fixedly on high and the airtemperature1.5m high measurement are designed to be held at the same time. Extract thebright temperature value from the infrared images. Analyze the correlation between thesurface bright temperature and air temperature1.5m high of different underlay and get thelinear equation with high correlation coefficient. Analyze the difference of the correlationamong the five kinds of underlay briefly.(3) Introduce the low altitude remote sensing shooting system and its two importantupgrades and the two remote sensing observation experiments. The two important upgradesare the wide-angle lens and the UP30autopilot. Analyze the influence and effect from theupgrades. The two observation experiments were held in the Guangzhou university campuseof Guangzhou university town and the Sino-Singapore Guangzhou knowledge city. Thesurface temperature and the air temperature1.5m high measurements were held at the sametime on the ground. Introduce the experiments scheme and instruments. Summarize thecompletion and the data obtained of the experiments. Expound the objective of theexperiments.(4) Introduce the operating procedure of image mosaic. The infrared images of the twoobservation regions are obtained. Analyze the influencing factors of the infrared imagemosaic. Use the temperature of the ground target test points to confirm the fixed emissivity ofthe underlay in the infrared images. Revise the two infrared images of the observation regions by the fixed emissivity. Get the fixed infrared images.(5) Use the linear equation we get before to find out the air temperature nearby theunderlay from the infrared images. Compare it with the measured value of the air temperature1.5m high on the ground to verify and appraise the applicability of this method. Analyze thereasons of the deviation between the derived value and the measured value to individualunderlay. Analyze the regional disparity to the differences of the derived values between thetwo observation regions.In this paper, the near ground temperature from aerial shots in low altitude is research ed.It can be used for reference to the advance of the low altitude remote sensing and use thismethod to research the urban thermal environment in hot and humid zone.