On-Orbit Performance Evaluation of On-Board Calibration Component of GF-5 Visible and Infrared Multispectral Imager

Wenxin, 黄文薪 Huang; Liming, 张黎明 Zhang; Xiaolong, 司孝龙 Si; Heyu, 许和鱼 Xu; Hongyao, 陈洪耀 Chen; Xin, 李鑫 Li; Yanhua, 赵艳华 Zhao

doi:10.3788/aos202040.2029001

Cited by 3 publications

(1 citation statement)

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“…Dozens of minerals can now be identified in the VNIR and SWIR bands with their nanoscale spectral resolutions (Clark et al, 2007). Therefore, hyperspectral data are also widely used in the study of mineralization and alteration information extraction, with significant progress and strong results when used in combination with traditional geological prospecting (Gersman et al, 2008;Jain and Sharma, 2019;Huang et al, 2020;Hajaj et al, 2023). Although much theoretical research and prospecting practices have been carried out in the extraction of alteration information from remote sensing images, most research has focused on the extraction of alteration information using singleimage data or a single method (Du et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Mapping alteration zones in the Southern section of Yulong copper belt, Tibet using multi-source remote sensing data

Dai

Zhou

et al. 2023

Front. Earth Sci.

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Methods for extracting mineralized alteration information using remote sensing images have recently become both efficient and cost-effective. Technology involving the extraction of alteration information based on multi-spectral data has been widely practiced and effectively verified. In recent years, research on fine mineral extraction methods based on hyperspectral data has also been rapidly developing. The Yulong copper belt is a porphyry copper belt located in China with high prospects for mineralization. However, most previous studies focused on the northern section of the Yulong copper belt, with limited exploration of the southern section. In this study, alteration information of the southern section of the Yulong copper belt was extracted from remote sensing data from Landsat-8 OLI, ASTER, and ZY1-02D, and the prospecting potential of this area was evaluated. Principal component analysis was used to extract iron oxide and hydroxyl alteration from Landsat-8 data, in addition to Al hydroxyl and propylitic alterations from ASTER data. Considering the challenge of the extraction of too many pseudo-anomalies using traditional methods, the mixture-tuned matched filtering (MTMF) method was used to more accurately extract iron oxide alterations. Regarding hyperspectral data, the minimum noise fraction and pure pixel index algorithms were used to extract white mica and carbonatite endmembers. The MTMF method was also used for alteration mapping, which took advantage of sub-pixel abundance mapping to finely divide the white mica and carbonatite alterations into five classes. The extraction results of multi-source remote sensing data were then compared and analyzed to avoid occasional single-image extraction results, which confirmed the superiority of the hyperspectral remote sensing and MTMF methods. Combined with field verification, the mineralization alteration information coincided with the spatial location of the Secuo, Mamupu, and Jicuo deposits, which confirmed the accuracy of alteration information extraction. The results of this study confirmed the application potential of remote sensing alteration information extraction in the field of mineral resource exploration. The results have important reference significance for further geological prospecting and exploration in the southern section of the Yulong copper belt.

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Section: Introductionmentioning

confidence: 99%

Mapping alteration zones in the Southern section of Yulong copper belt, Tibet using multi-source remote sensing data

Dai

Zhou

et al. 2023

Front. Earth Sci.

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Intercomparison of On-Orbit Consistency of Radiometric Calibration Between Two Sensor Calibration Spectrometers of HY Satellite

Gao¹,

Ma²,

Song³

2023

Lecture Notes in Electrical Engineering

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Research on a Partial Aperture Factor Measurement Method for the AGRI Onboard Calibration Assembly

Chen

et al. 2022

Sensors

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A partial aperture onboard calibration method can solve the onboard calibration problems of some large aperture remote sensors, which is of great significance for the development trend of increasingly large apertures in optical remote sensors. In this paper, the solar diffuser reflectance degradation monitor (SDRDM) in the onboard calibration assembly (CA) of the FengYun-4 (FY-4) advanced geostationary radiance imager (AGRI) was used as the reference radiometer. It was designed for measuring the partial aperture factor (PAF) for the AGRI onboard calibration. First, the linear response count variation relationship between the two was established under the same radiance source input. Then, according to the known bidirectional reflection distribution function (BRDF) of the solar diffuser (SD) in the CA, the relative reflectance ratio coefficient between the AGRI observation direction and the SDRDM observation direction was calculated. On this basis, the response count value of the AGRI and the SDRDM was used to realize the high-precision measurement of the PAF of the AGRI B1~B3 bands by simulating the AGRI onboard calibration measurement under the illumination of a solar simulator in the laboratory. According to the determination process of the relevant parameters of the PAF, the measurement uncertainty of the PAF was analyzed; this uncertainty was greater than 2.04% and provided an important reference for the evaluation of the onboard absolute radiometric calibration uncertainty after launch.

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On-Orbit Performance Evaluation of On-Board Calibration Component of GF-5 Visible and Infrared Multispectral Imager

Cited by 3 publications

References 0 publications

Mapping alteration zones in the Southern section of Yulong copper belt, Tibet using multi-source remote sensing data

Mapping alteration zones in the Southern section of Yulong copper belt, Tibet using multi-source remote sensing data

Intercomparison of On-Orbit Consistency of Radiometric Calibration Between Two Sensor Calibration Spectrometers of HY Satellite

Research on a Partial Aperture Factor Measurement Method for the AGRI Onboard Calibration Assembly

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