Abstract
This paper illustrates a proposed method for the retrieval of land surface temperature (LST) from the two thermal bands of the LAND-SAT-8 data. LANDSAT-8, the latest satellite from Landsat series, launched on 11 February 2013, using LANDSAT-8 Operational Line Imager and Thermal Infrared Sensor (OLI & TIRS) satellite data. LANDSAT-8 medium spatial resolution multispectral imagery presents particular interest in extracting land cover, because of the fine spectral resolution, the radiometric quantization of 12 bits. In this search a trial has been made to estimate LST over Al-Hashimiya district, south of Babylon province, middle of Iraq. Two dates images acquired on 2nd &18th of March 2018 to retrieve LST and compare them with ground truth data from infrared thermometer camera (all the meas-urements contacted with target by using type-k thermocouple) at the same time of images capture. The results showed that the rivers had a higher LST which is different to the other land cover types, of less than 3.47 C ◦, and the LST different for vegetation and residential area were less than 0.4 C ◦ with correlation coefficient of the two bands 10 and 11 Rbnad10= 0.70, Rband11 = 0.89 respectively, for the im-aged acquired on the 2nd of march 2018 and Rband10= 0.70 and Rband11 = 0.72 on the 18th of march 2018. These results confirm that the proposed approach is effective for the retrieval of LST from the LANDSAT-8 Thermal bands, and the IR thermometer camera data which is an effective way to validate and improve the performance of LST retrieval. Generally the results show that the closer measure-ment taken from the scene center time, a better quality to classify the land cover. The purpose of this study is to assess the use of LAND-SAT-8 data to specify temperature differences in land cover and compare the relationship between land surface temperature and land cover types.
Highlights
Land surface temperature (LST) play an important role in research on agricultural analyses, effects of urban heat island, and environmental monitoring [1]
The Operational Land Imager (OLI) instrument with nine spectral bands in the visible (VIS), near infrared (NIR) (Table 1), and the shortwave infrared (SWIR) spectral regions, while the Thermal Infrared Sensor (TIRS) instrument with two thermal infrared spectral bands in the long wave infrared (LWIR) respectively centered at 10.9 μm and 12 μm (Table 2)
One image was obtained on March the 2nd, 2013; the other image was obtained on March the 18th, 2013 and both were used in this paper
Summary
Land surface temperature (LST) play an important role in research on agricultural analyses, effects of urban heat island, and environmental monitoring [1]. The Date palm trees cover a wide are, up to more than 2 million trees It is characterized by the cultivation of field crops, especially wheat, barley and corn, where the agricultural area is covered more than 123000 hectares, according to the statistics of the province of Babylon in 2017 .The AlHashimiya district is considered the geographical center of Iraq, where the distance from east to west of Iraq is equal to the distance from north to south. Satellite data over Al-Hashimiya city of the 2nd and the 18th of March 2018 (day time, level-1TP product, path/raw 168/38) have been used in this study Both were downloaded from USGS with image quality 9. The Infrared Thermometer Camera as shown in figure (4a) is for non-contact temperature measurement. The meteorological data recorded the minimum and maximum temperature degree ranges 18 to 25 C◦ and 9 to 24 C◦ for the days 02/03/2018 and 18/03/2018 respectively
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