การเปรียบเทียบอุณหภูมิความส่องสว่างจากช่วงคลื่นอินฟราเรดความร้อนที่ 1 และ 2 ของดาวเทียม LANDSAT-8
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Abstract
The comparison of brightness temperatures from thermal infrared band 1 and 2 of LANDSAT 8 has 2 objectives; (1) to compare the relationship between brightness temperatures from thermal infrared bands and temperature from the ground station, and (2) to analyze the difference of multi-temporal temperatures in January to May from 2014 to 2018. The study area is in Pua district, Nan province. The thermal infrared bands of Landsat–8 data were used to calculate the brightness temperatures of 2 bands and also compare the relationship with temperature from the ground station. Pearson’s correlation coefficient was selected to find a significant correlation among them. The results found that it is significant (p < 0.01) correlation between brightness temperatures from band 10 and temperature from the ground station with a coefficient of determination (R) = 0.581. However, there is no significant (p < 0.01) correlation between brightness temperatures from band 11 and temperature from the ground station with a coefficient of determination (R) = 0.394. For the analysis of difference of multi-temporal temperatures from 2014 to 2018, the 41-temperature sampling points of X-axis and Y-axis in the largest width and length of the study area were performed. This is to analyze the difference of multi-temporal temperatures. This result found that there is a standard deviation (S.D.) of temperature data from 2014 to 2018 with 0.06, 0.03, 0.04, 0.11 and 0.13, respectively. And there is significant (p < 0.01) correlation between temperature sampling points in 2014 and from 2015 to 2018 with coefficient of determine (R) = 0.562, 0.869, 0.748 and 0.701, respectively.
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References
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