Multi-point radiometric calibration method based on complex spectrum of Fourier transform spectrometer

2014 ◽  
Author(s):  
Qian He ◽  
Guangping Wang ◽  
Jingli Wu ◽  
Junwei Li
Keyword(s):  
Fourier Transform ◽  
Calibration Method ◽  
Complex Spectrum ◽  
Fourier Transform Spectrometer ◽  
Radiometric Calibration

scholarly journals Level 0 to 1 processing of the imaging Fourier transform spectrometer GLORIA: generation of radiometrically and spectrally calibrated spectra

2014 ◽  
Vol 7 (12) ◽  
pp. 4167-4184 ◽  
Author(s):  
A. Kleinert ◽  
F. Friedl-Vallon ◽  
T. Guggenmoser ◽  
M. Höpfner ◽  
T. Neubert ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Data Processing ◽  
Infrared Detector ◽  
Michelson Interferometer ◽  
Infrared Camera ◽  
Fourier Transform Spectrometer ◽  
Radiometric Calibration ◽  
Infrared Spectral ◽  
Research Aircraft ◽  
Intelligent Optimisation

Abstract. The Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA) is an imaging Fourier transform spectrometer that is capable of operating on various high-altitude research aircraft. It measures the atmospheric emission in the thermal infrared spectral region in limb and nadir geometry. GLORIA consists of a classical Michelson interferometer combined with an infrared camera. The infrared detector has a usable area of 128 × 128 pixels, measuring up to 16 384 interferograms simultaneously. Imaging Fourier transform spectrometers impose a number of challenges with respect to instrument calibration and algorithm development. The optical setup with extremely high optical throughput requires the development of new methods and algorithms for spectral and radiometric calibration. Due to the vast amount of data there is a high demand for scientifically intelligent optimisation of the data processing. This paper outlines the characterisation and processing steps required for the generation of radiometrically and spectrally calibrated spectra. Methods for performance optimisation of the processing algorithm are presented. The performance of the data processing and the quality of the calibrated spectra are demonstrated for measurements collected during the first deployments of GLORIA on aircraft.

scholarly journals Level 0 to 1 processing of the imaging Fourier transform spectrometer GLORIA: generation of radiometrically and spectrally calibrated spectra

2014 ◽  
Vol 7 (3) ◽  
pp. 2827-2878 ◽  
Author(s):  
A. Kleinert ◽  
F. Friedl-Vallon ◽  
T. Guggenmoser ◽  
M. Höpfner ◽  
T. Neubert ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Data Processing ◽  
Infrared Detector ◽  
Michelson Interferometer ◽  
Infrared Camera ◽  
Fourier Transform Spectrometer ◽  
Radiometric Calibration ◽  
Infrared Spectral ◽  
Research Aircraft ◽  
Intelligent Optimisation

Abstract. The Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA) is an imaging Fourier transform spectrometer that is capable of operating on various high altitude research aircraft. It measures the atmospheric emission in the thermal infrared spectral region in limb and nadir geometry. GLORIA consists of a classical Michelson interferometer combined with an infrared camera. The infrared detector has a usable range of 128 × 128 pixels, measuring up to 16 384 interferograms simultaneously. Imaging Fourier transform spectrometers impose a number of challenges with respect to instrument calibration and algorithm development. The innovative optical setup with extremely high optical throughput requires the development of new methods and algorithms for spectral and radiometric calibration. Due to the vast amount of data there is a high demand for scientifically intelligent optimisation of the data processing. This paper outlines the characterisation and processing steps required for the generation of radiometrically and spectrally calibrated spectra. Methods for performance optimisation of the processing algorithm are presented. The performance of the data processing and the quality of the calibrated spectra are demonstrated for measurements collected during the first deployments of GLORIA on aircraft.

scholarly journals Vicarious Radiometric Calibration of Ocean Color Bands for FY-3D/MERSI-II at Lake Qinghai, China

Sensors ◽  
2020 ◽  
Vol 21 (1) ◽  
pp. 139
Author(s):  
Shengli Chen ◽  
Xiaobing Zheng ◽  
Xin Li ◽  
Wei Wei ◽  
Shenda Du ◽  
...  
Keyword(s):  
Infrared Imaging ◽  
Large Deviation ◽  
Ocean Color ◽  
Calibration Method ◽  
Surface Measurement ◽  
Radiometric Calibration ◽  
Lake Qinghai ◽  
Vicarious Calibration ◽  
Calibration Methods ◽  
Spectral Imager

To calibrate the low signal response of the ocean color (OC) bands and test the stability of the Fengyun-3D (FY-3D)/Medium Resolution Spectral Imager II (MERSI-II), an absolute radiometric calibration field test of FY-3D/MERSI-II at the Lake Qinghai Radiometric Calibration Site (RCS) was carried out in August 2018. The lake surface and atmospheric parameters were mainly measured by advanced observation instruments, and the MODerate spectral resolution atmospheric TRANsmittance algorithm and computer model (MODTRAN4.0) was used to simulate the multiple scattering radiance value at the altitude of the sensor. The results showed that the relative deviations between bands 9 and 12 are within 5.0%, while the relative deviations of bands 8, and 13 are 17.1%, and 12.0%, respectively. The precision of the calibration method was verified by calibrating the Aqua/Moderate-resolution Imaging Spectroradiometer (MODIS) and National Polar-orbiting Partnership (NPP)/Visible Infrared Imaging Radiometer (VIIRS), and the deviation of the calibration results was evaluated with the results of the Dunhuang RCS calibration and lunar calibration. The results showed that the relative deviations of NPP/VIIRS were within 7.0%, and the relative deviations of Aqua/MODIS were within 4.1% from 400 nm to 600 nm. The comparisons of three on-orbit calibration methods indicated that band 8 exhibited a large attenuation after launch and the calibration results had good consistency at the other bands except for band 13. The uncertainty value of the whole calibration system was approximately 6.3%, and the uncertainty brought by the field surface measurement reached 5.4%, which might be the main reason for the relatively large deviation of band 13. This study verifies the feasibility of the vicarious calibration method at the Lake Qinghai RCS and provides the basis and reference for the subsequent on-orbit calibration of FY-3D/MERSI-II.

Molecular beam millimeter sidebands Fourier transform spectrometer (MB-MMSBFT)

1994 ◽  
Vol 15 (9) ◽  
pp. 1481-1496 ◽  
Author(s):  
D. Boucher ◽  
R. Bocquet ◽  
D. Petitprez ◽  
L. Aime
Keyword(s):  
Fourier Transform ◽  
Molecular Beam ◽  
Fourier Transform Spectrometer

Features of the reference laser signal in the space-borne Fourier Transform Spectrometer

2010 ◽  
Author(s):  
Huandong Wei ◽  
Jianwen Hua ◽  
Zuoxiao Dai ◽  
Ren Chen ◽  
Xiaojie Sun
Keyword(s):  
Fourier Transform ◽  
Fourier Transform Spectrometer ◽  
Laser Signal ◽  
Reference Laser
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