A Methodology for CO2 Retrieval Applied to Hyperspectral PRISMA Data

Romaniello, Vito; Spinetti, Claudia; Silvestri, Malvina; Buongiorno, M. F.

doi:10.3390/rs13224502

Cited by 18 publications

(8 citation statements)

References 37 publications

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“…Recently, the need for compact spectrometers for enhanced climate and pollution monitoring has been put forward, as highlighted by, for example, the CHAPS instrument that targets the monitoring of local pollution in urban areas [ 21 ]. Possible integration with an 1100–1700 nm spectrometer might enable greenhouse gas monitoring [ 14 , 15 , 16 , 17 ]. Also, as our telescope achieves an RMS spot diameter of the order of 30 µm or less at the detector plane, this telescope would be compatible with other spectrometers operating within wavelength ranges exceeding 1700 nm, while keeping a diffraction-limited design for the telescope.…”

Section: Discussion and Future Perspectivesmentioning

confidence: 99%

“…This wavelength range is complementary to TROPOMI [ 11 ] and would enable greenhouse gas monitoring when supplementing the telescope with a spectrometer. More specifically, carbon dioxide column densities have been observed at 1600 nm [ 15 , 16 ], while water vapor shows characteristic absorbances around 1130 nm and 1400 nm [ 14 ], and methane features a spectral line at 1670 nm [ 17 ]. Cameras and telescopes operating within the visible wavelength range (400–900 nm) are already widely available.…”

Section: Introductionmentioning

confidence: 99%

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Freeform Wide Field-of-View Spaceborne Imaging Telescope: From Design to Demonstrator

Schifano

Vervaeke

Rosseel

et al. 2022

Sensors

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Wide field-of-view imaging optics offer a huge potential for space-based Earth observation enabling the capture of global data. Reflective imaging telescopes are often favored, as they do not show chromatic aberrations and are less susceptible to radiation darkening than their refractive counterparts. However, the main drawback of reflective telescopes is that they are limited with respect to field-of-view while featuring large dimensions. We propose the use of freeform optics to maximize the field of view while maintaining diffraction-limited image quality and minimizing system dimensions. In this paper, we present a novel freeform wide field-of-view reflective telescope, starting from the optical design, and continuing to tolerancing analysis and manufacture, towards a proof-of-concept demonstrator. The novel telescope features a full field-of-view of 120° while showing an exceptional spatial resolution of 2.6 km and fitting within 1 CubeSat unit. To the best of our knowledge, this is the widest field-of-view that has ever been realized for a space-based telescope, nearly reaching Earth observation from limb to limb from an altitude of about 700 km. We hope this design paves the way for future space missions enabling improved Earth observation and leading to enhanced monitoring of climate and climate change.

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Section: Discussion and Future Perspectivesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Freeform Wide Field-of-View Spaceborne Imaging Telescope: From Design to Demonstrator

Schifano

Vervaeke

Rosseel

et al. 2022

Sensors

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show abstract

“…Following that, hyperspectral processing techniques can be applied on the measurement data, including the application of chemometrics and machine learning to extract the information on the greenhouse gases’ concentrations. The optimization of these processing algorithms is a subject for future work, but will be based on the currently used spaceborne spectroscopy processing [ 39 , 40 , 41 , 42 , 43 , 44 ].…”

Section: Methodsmentioning

confidence: 99%

Optical Design of a Novel Wide-Field-of-View Space-Based Spectrometer for Climate Monitoring

Schifano

Berghmans

Dewitte

et al. 2022

Sensors

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We report on a near-infrared imaging spectrometer for sensing the three most prominent greenhouse gases in the atmosphere (water vapor, carbon dioxide and methane). The optical design of the spectrometer involves freeform optics, which enables achieving exceptional performance and allows progressing well beyond the state-of-the-art in terms of compactness, field-of-view, and spatial resolution. The spectrometer is intended to be launched on a small satellite orbiting at 700 km and observing the Earth with a wide field-of-view of 120° and a spatial resolution of 2.6 km at nadir. The satellite will ultimately allow for improved climate change monitoring.

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“…Since the launch of the ASI-PRISMA sensor (2019), and with the DLR-EnMAP's launch (2022), our capability to exploit surface characterization has increased. The identification and extraction of surface features depend on established algorithms and processing methodologies tailored to various application domains, including geology [1], agriculture [2], water management [3,4], inland and coastal water monitoring [5], gas emission retrieval [6,7], and fire detection [8]. In 2019, the Italian Space Agency introduced a hyperspectral imaging platform called PRecursore Iperspettrale della Missione Applicativa (PRISMA) [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Comparison of ASI-PRISMA Data, DLR-EnMAP Data, and Field Spectrometer Measurements on “Sale ‘e Porcus”, a Salty Pond (Sardinia, Italy)

Musacchio,

Silvestri,

Romaniello

et al. 2024

Remote Sensing

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A comparison between the ASI-PRISMA (Agenzia Spaziale Italiana-PRecursore IperSpettrale della Missione Applicativa) DLR-EnMAP (German Aerospace Center—Environmental Mapping and Analysis Program) data and field spectrometer measurements has been performed. The test site, located at the “Sale ‘e Porcus” pond (hereafter SPp) in Western Sardinia, Italy, offers particularly homogenous characteristics, making it an ideal location not only for experimentation but also for calibration purposes. Three remote-sensed data acquisitions have been performed by these agencies (ASI and DLR) starting on 14 July 2023 and continuing until 22 July 2023. The DLR-EnMAP data acquired on 22 July overestimates both that of the ASI-PRISMA and the 14 July DLR-EnMAP radiance in the VNIR region, while all the datasets are close to each other, up to 2500 nm, for all considered days. The average absolute mean difference between the reflectance values estimated by the ASI-PRISMA and DLR-EnMAP, in the test area, is around 0.015, despite the small difference in their time of acquisition (8 days); their maximum relative difference value occurs at about 2100 nm. In this study, we investigate the relationship between the averaged ground truth value of reflectance, acquired by means of a portable ASD FieldSpec spectoradiometer, characterizing the test site and the EO reflectance data derived from the official datasets. FieldSpec measurements confirm the quality of both the ASI-PRISMA and DLR-EnMAP’s reflectance estimations.

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A Methodology for CO2 Retrieval Applied to Hyperspectral PRISMA Data

Cited by 18 publications

References 37 publications

Freeform Wide Field-of-View Spaceborne Imaging Telescope: From Design to Demonstrator

Freeform Wide Field-of-View Spaceborne Imaging Telescope: From Design to Demonstrator

Optical Design of a Novel Wide-Field-of-View Space-Based Spectrometer for Climate Monitoring

Comparison of ASI-PRISMA Data, DLR-EnMAP Data, and Field Spectrometer Measurements on “Sale ‘e Porcus”, a Salty Pond (Sardinia, Italy)

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