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Volume 16
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10.3390/rs16193674
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Article

Spectral Calibration of the Spectrometer on Board the Colombian FACSAT-2 Satellite Mission

by
Lorena Paola Cárdenas Espinosa
1,2,*,
Enrique Mejía-Ospino
2,
Luis Guarnizo
2,
Jorge Prada Mejia
3,4,
Erick Enrique Gutiérrez
2,
Jorge Paiba Alzate
3,
Iván Plata
3,
Efraín Rodríguez Rubio
3,4,
Alejandro Carvajal
1,2 and
Paola Zarate
1,2
1
Fuerza Aérea Colombiana (FAC), Cra 8 # 58-67, Cali 760011, Colombia
2
Centro de Investigación y Desarrollo en Tecnologías Aeroespaciales (CITAE), Cra 8 # 58-67, Cali 760011, Colombia
3
Ecopetrol, Via Piedecuesta km. 7, Santander 681011, Colombia
4
Instituto Colombiano del Petróleo y Energías de la Transición (ICPET/ECOPETROL), Via Piedecuesta km. 7, Santander 681011, Colombia
*
Author to whom correspondence should be addressed.
Remote Sens. 2024, 16(19), 3674; https://doi.org/10.3390/rs16193674
Submission received: 25 July 2024 / Revised: 19 September 2024 / Accepted: 20 September 2024 / Published: 1 October 2024
(This article belongs to the Topic Hyperspectral Imaging and Signal Processing)
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Abstract

This paper presents the results of the integration, commissioning, and in-orbit calibration of the ARGUS 2000 SWIR wavelength spectrometer onboard the Colombian FACSAT-2 satellite, Colombia’s first satellite used for the measurement of greenhouse gases (GHG). The satellite has been in orbit for approximately one year, gathering spectral signatures in order to characterize the data and perform calibration. The calibration represents a certain behavior following a second-order adjustment. For data analysis, retrieval algorithms have been developed to obtain synthetic spectra using the Genspect 1.2 software code. These synthetic spectra were obtained from the spectroscopic data associated with atmospheric gases (H2O, O2, CO, and CO2), which are stored in the HITRAN database. Attempting to achieve a more accurate simulation of the experimental spectrum, certain instrumental parameters have been incorporated into the synthetic spectrum, including the resolution of the spectrometer, the field of view (FOV) angle of observation, the limited quantum efficiency of detection, and the slit function. As a result, six slit functions were tested, with the Gaussian and the diffraction functions proving to be the most effective. Finally, a profile of Total Carbon Column Observing Network (TCCON) concentrations was used for comparison with a spectral signature acquired by FACSAT-2, resulting in a close match between the synthetic spectrum and the measured spectrum.
Keywords: greenhouse gases; spectrometer; synthetic spectra; nanosatellite greenhouse gases; spectrometer; synthetic spectra; nanosatellite

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MDPI and ACS Style

Cárdenas Espinosa, L.P.; Mejía-Ospino, E.; Guarnizo, L.; Prada Mejia, J.; Gutiérrez, E.E.; Alzate, J.P.; Plata, I.; Rodríguez Rubio, E.; Carvajal, A.; Zarate, P. Spectral Calibration of the Spectrometer on Board the Colombian FACSAT-2 Satellite Mission. Remote Sens. 2024, 16, 3674. https://doi.org/10.3390/rs16193674

AMA Style

Cárdenas Espinosa LP, Mejía-Ospino E, Guarnizo L, Prada Mejia J, Gutiérrez EE, Alzate JP, Plata I, Rodríguez Rubio E, Carvajal A, Zarate P. Spectral Calibration of the Spectrometer on Board the Colombian FACSAT-2 Satellite Mission. Remote Sensing. 2024; 16(19):3674. https://doi.org/10.3390/rs16193674

Chicago/Turabian Style

Cárdenas Espinosa, Lorena Paola, Enrique Mejía-Ospino, Luis Guarnizo, Jorge Prada Mejia, Erick Enrique Gutiérrez, Jorge Paiba Alzate, Iván Plata, Efraín Rodríguez Rubio, Alejandro Carvajal, and Paola Zarate. 2024. "Spectral Calibration of the Spectrometer on Board the Colombian FACSAT-2 Satellite Mission" Remote Sensing 16, no. 19: 3674. https://doi.org/10.3390/rs16193674

APA Style

Cárdenas Espinosa, L. P., Mejía-Ospino, E., Guarnizo, L., Prada Mejia, J., Gutiérrez, E. E., Alzate, J. P., Plata, I., Rodríguez Rubio, E., Carvajal, A., & Zarate, P. (2024). Spectral Calibration of the Spectrometer on Board the Colombian FACSAT-2 Satellite Mission. Remote Sensing, 16(19), 3674. https://doi.org/10.3390/rs16193674

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