Cross-Calibration of GF-1 PMS Sensor With Landsat 8 OLI and Terra MODIS

Gao, Hongli; Gu, Xingfa; Yu, Tao; Sun, Yuan; Liu, Qiyue

doi:10.1109/tgrs.2016.2552242

Cited by 27 publications

(21 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A flat ground without vegetation at an unpolluted region makes it highly stable and uniform (less than 2% variation over the 10 km * 10 km central region [4]). This site has been used to calibrate and validate many of China's satellites, like FY series [5,6], CBERS series [7], HJ [8] and GF series [9,10]. In this study, Dunhuang site is only used for radiometric capability evaluation and validation purposes for two reasons: (1) routine ground campaigns have been carried out yearly during June to August and the synchronized ground measurements have subsequently been taken routinely; (2) the flat surface makes it impossible to construct BRDF characterization using nadir viewing Landsat8/OLI data.…”

Section: Dunhuang Sitementioning

confidence: 99%

Radiometric Cross-Calibration of the Wide Field View Camera Onboard GaoFen-6 in Multispectral Bands

Yang

Zhong

et al. 2020

Remote Sensing

View full text Add to dashboard Cite

GaoFen6 (GF-6), successfully launched on June 2, 2018, is the sixth satellite of the High-Definition Earth observation system (HDEOS). Although GF-6 is the first high-resolution satellite in China to achieve precise agricultural observation, it will be widely used in many other domains, such as land survey, natural resources management, emergency management, ecological environment and so on. The GF-6 was not equipped with an onboard calibration instrument, so on-orbit radiometric calibration is essential. This paper aimed at the on-orbit radiometric calibration of the wide field of view camera (WFV) onboard GF-6 (GF-6/WFV) in multispectral bands. Firstly, the radiometric capability of GF-6/WFV is evaluated compared with the Operational Land Imager (OLI) onboard Landsat-8, Multi Spectral Instrument (MSI) onboard Sentinel-2 and Moderate Resolution Imaging Spectroradiometer (MODIS) onboard Terra, which shows that GF-6/WFV has an obvious attenuation. Consequently, instead of vicarious calibration once a year, more frequent calibration is required to guarantee its radiometric consistency. The cross-calibration method based on the Badain Jaran Desert site using the bi-directional reflectance distribution function (BRDF) model calculated by Landsat-8/OLI and ZY-3/Three-Line Camera (TLC) data is subsequently applied to GF-6/WFV and much higher frequencies of calibration are achieved. Finally, the cross-calibration results are validated using the synchronized ground measurements at Dunhuang test site and the uncertainty of the proposed method is analyzed. The validation shows that the relative difference of cross-calibration is less than 5% and it is satisfied with the requirements of cross-calibration.

show abstract

Section: Dunhuang Sitementioning

confidence: 99%

Radiometric Cross-Calibration of the Wide Field View Camera Onboard GaoFen-6 in Multispectral Bands

Yang

Zhong

et al. 2020

Remote Sensing

View full text Add to dashboard Cite

show abstract

“…The TOA radiances derived by the PMCs are compared with TOA radiance of MODIS. The relative errors (REs) are calculated by Equation (5). Finally, the results are summarized in Table 5, which illustrates that the PMCs have high radiometric calibration accuracy.…”

Section: Validation Of Absolute Radiometric Calibrationmentioning

confidence: 97%

“…The coefficient of variation (CV) (the ratio of the standard deviation and mean reflectance) of reflectance over DRCS is about 5% [5]. This site is officially used to obtain on-orbit absolute radiometric calibration coefficients for the visible and near-infrared sensor of Chinese land observation satellites by using the vicarious calibration method, such as the CBERS (China and Brazil Earth Resource Satellite), HJ (HuanJing), FY (FengYun), ZY (ZiYuan), GF-1, GF-2, GF-4, TH (TianHui), etc.…”

Section: Test Sitesmentioning

confidence: 99%

“…MODIS aboard the Terra satellite was launched on 18 December 1999, which freely provides near-daily global coverage data quantized into 12 bit [6]. The solar diffuser (SD) and solar diffuser stability monitor (SDSM) can ensure the uncertainty of MODIS TOA reflectance products and at-sensor spectral radiance products is around 2% and 5%, respectively [5,7]. MODIS, therefore, is acting as the radiance reference for on-orbit cross-calibration of space-borne sensors absent an on-orbit radiometric calibration facility.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

On-Orbit Radiometric Calibration for a Space-Borne Multi-Camera Mosaic Imaging Sensor

Xie

Han

et al. 2017

Remote Sensing

Self Cite

View full text Add to dashboard Cite

Abstract:As the core and foundational technology, on-orbit radiometric calibration of a space-borne sensor is of great importance for quantitative remote sensing applications. As for the space-borne multi-camera mosaic imaging sensor, however, the currently available on-orbit radiometric calibration method cannot carry out the integrated processing of on-orbit absolute radiometric calibration and relative radiometric correction simultaneously between cameras, influencing the accuracy of quantitative applications. Therefore, taking the GaoFen-1 (GF-1) wide-field-of-view (WFV) sensor as an example in this research, an innovative on-orbit radiometric calibration method is proposed to overcome this bottleneck. Firstly, according to the principle of the cross-calibration approach, we retrieve valid MODIS and GF-1 WFV image pairs over the Dunhuang radiometric calibration sites (DRCS) in China by using a set of criteria and extract the radiometric control points (RCPs) connecting in both images. Secondly, the DEM-aided block adjustment of the rational function model is applied to eliminate the geometrical misalignment of GF-1 WFV images at the same orbit. Then, the average digital numbers of spectral and spatial homogeneous surfaces are calculated and chosen as the radiometric tie points (RTPs) extracted from the overlapping region of the adjacent WFV cameras. Thirdly, the radiometric block adjustment (RBA) algorithm is introduced into on-orbit radiometric calibration of the space-borne multi-camera mosaic imaging sensor. Finally, the radiometric calibration coefficients are solved by the least square method. The validation results indicate that our proposed method can acquire high absolute radiometric calibration accuracy and achieve relative radiometric correction between cameras. Compared with the results using the cross-calibration method to calibrate each WFV camera independently, the advantages of RBA are presented. In addition, the uncertainties caused by RCPs' distribution are discussed, which is beneficial to further optimize the calibration program.

show abstract

“…Using the time series water vapor content of MODIS, the monthly average water vapor content is obtained; the historical weather query is used to count the number of sunny days at each site. There are very few disturbances and low aerosol loads from the clouds, no vegetation on the ground, composed of sand and small black stones [6] . In addition, the surface reflectance spectrum is relatively stable within the dynamic range of the optical satellite sensor.…”

Section: (3) Spectral Characteristicsmentioning

confidence: 99%

Site Selection and Evaluation of China's New Radiometric Calibration Test Sites

Gao

Cheng

et al. 2020

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

View full text Add to dashboard Cite

Abstract. The ideal radiometric calibration site is the basis for achieving on-orbit radiometric calibration. At present, China mainly uses the Dunhuang national test site for on-orbit radiometric calibration. However, the Dunhuang national test site has a shortage of ground objects and surface damage, and it is urgent to select and evaluate the new calibration sites. By analyzing the calibration site selection requirements, three new radiometric calibration sites were selected in Dunhuang and Golmud. Obtaining high-resolution satellite image data of each calibration site and evaluating the spatial uniformity of the site on different spatial scales. The radiometric stability of the sites is evaluated using the long-term sequence of Landsat8 image data from 2013 to 2019. Atmospheric and surface tests were carried out at various sites in August 2019, and atmospheric information and ground spectral data were obtained to evaluate the spectral characteristics of the sites. The surface directional characteristics of the sites are evaluated by using MODIS images at different angles in sunny weather on adjacent dates. Obtaining MOD05 water vapor products from 2013 to 2019 of each calibration site and conducting monthly statistics. The number of sunny days at each calibration site is counted and the drought conditions of the site are evaluated. The results show that the three new radiometric calibration sites have uniform and stable surface characteristics and atmospheric characteristics, and are suitable for on-orbit radiometric calibration of satellite sensors, which provides a reference for the location and evaluation of future calibration sites.

show abstract

Cross-Calibration of GF-1 PMS Sensor With Landsat 8 OLI and Terra MODIS

Cited by 27 publications

References 20 publications

Radiometric Cross-Calibration of the Wide Field View Camera Onboard GaoFen-6 in Multispectral Bands

Radiometric Cross-Calibration of the Wide Field View Camera Onboard GaoFen-6 in Multispectral Bands

On-Orbit Radiometric Calibration for a Space-Borne Multi-Camera Mosaic Imaging Sensor

Site Selection and Evaluation of China's New Radiometric Calibration Test Sites

Contact Info

Product

Resources

About