The Multi Angle Polarimeter (MAP) on board ESA’s Copernicus Carbon Dioxide Monitoring mission (CO2M)

Spilling, David; Thales, Andrew

doi:10.1117/12.2599174

Cited by 9 publications

(7 citation statements)

References 3 publications

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“…More experimental and modeling work should be carried out to investigate the cross-talk effects of this concept in comparison to other pixelated technologies. Cross-talks are in fact recognized to be a limiting performance key parameter for similar filters in those type of instruments [29].…”

Section: Recommendations For Future Workmentioning

confidence: 99%

A multispectral polarimetric instrument concept based on metasurface filters

Ceccotti,

Brenny,

Gerini

et al. 2023

Sensors, Systems, and Next-Generation Satellites XXVII

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Remote sensing of aerosols requires spectropolarimetric information over different viewing angles with demanding polarimetric accuracy and growing interest for smaller designs. In this paper, we investigate an instrument design that implements a metasurface filter which enables both functions simultaneously, allowing further miniaturization and integrability. The instrument offers 1 km ground sampling distance over its entire field of view, in Low Earth Orbit, and the concept makes use of six modules to cover the wide field of view requested for aerosol retrieval with a total of seven radiation-resistant lenses. This choice enables an optical volume per module under 50mm × 50mm × 150mm and smaller relative angles of incidence. The filters are designed to cover six spectral bands from 443 nm to 870 nm with a spectral resolution of 2 nm to 5 nm. The wide spectral band is achieved by using three distributed Bragg reflectors with bandpass filters, integrated in one double-cavity structure that can be glued on a CCD/CMOS sensor. The two cavities, operating as a metasurface, contain scatterers of different dimensions enabling the fine-tuning of the spectral resonance and the polarization filtering. Multiscale forward modeling techniques are employed for the estimation of the polarimetric accuracy with optical aberrations and realistic coatings. Using radiance values from the PACE mission, polarimetric errors and SNR at each pixel are estimated and compared to requirements of state-of-the-art missions.

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Section: Recommendations For Future Workmentioning

confidence: 99%

A multispectral polarimetric instrument concept based on metasurface filters

Ceccotti,

Brenny,

Gerini

et al. 2023

Sensors, Systems, and Next-Generation Satellites XXVII

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“…The specificity of the MAP instrument comes from the focal plane assembly (FPA) which allows to combine both the polarisation and the spectral filtering functions. This is possible thanks to the use of a large FPA composed of a 2D array of wire grid micropolarisers which offers the 3 needed polarisations with a pitch of the same dimension as the detector pitch and a multispectral filter array which provides one spectral band at the pitch of the triplets of polarizer [18] (Figure 15). The same detector CIS-120 is used as for CO2I VNIR channels.…”

Section: Design Solutionmentioning

confidence: 99%

Status on the development of the Copernicus CO2M mission: monitoring anthropogenic carbon dioxide from space

Durand,

Pachot,

Bazalgette Courrèges-Lacoste

et al. 2023

Sensors, Systems, and Next-Generation Satellites XXVII

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The European Space Agency (ESA), in collaboration with the European Commission (EC) and EUMETSAT, is developing as part of the EC’s Copernicus programme, six new missions to strengthen the already existing family of six Sentinels missions. The six new Sentinel Expansion missions cover four themes: Safeguarding the Artic, Monitoring Land and Natural Resources, Food Security and Management and Combating Climate Change. For this last theme, a space-borne observing system for quantification of anthropogenic carbon dioxide (CO2) emissions is in development. The anthropogenic CO2 monitoring (CO2M) mission will be implemented as a constellation of identical Low Earth Orbit satellites, to be operated over a period of more than seven years. Each satellite will continuously measure CO2 concentration in terms of column-averaged dry air mole fraction (denoted XCO2) along the satellite track on the sun-illuminated part of the orbit, with a swath width of 250 km. Observations will be provided at a spatial resolution of 4 km2, with high precision (⪅0.7 ppm) and accuracy (bias ⪅0.5 ppm), which are required to resolve the small atmospheric gradients in XCO2 originating from anthropogenic activities. The demanding requirements necessitate a payload composed of three instruments, which simultaneously perform co-located measurements: a push-broom imaging spectrometer in the Near Infrared (NIR) and Short-Wave Infrared (SWIR) for retrieving XCO2 and in the Visible spectral range (VIS) for nitrogen dioxide (NO2), a Multi Angle Polarimeter (MAP) and a three-band Cloud Imager (CLIM). Following the Satellite PDR, the industrial activities have concentrated in consolidating the design of the three instruments and the platform as well as completing the different development models. The paper presents the status of these activities which are leading to the Critical Design Review before entering into the flight manufacturing and assembly phase.

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“…The types of filter arrays manufactured with IAD coatings can range from order sorting filters with coating dimensions in the mm range [5] to seven band filters with a stripe width of 100 μm only [6]. Smallest filter dimension manufactured for space applications is an 1024 x 1024 pixel array with four different color bands and a filter size of 18 μm x 18 μm each.…”

Section: Filter Arrays With Coatings By Iad Technologymentioning

confidence: 99%

Manufacturing of monolithic and butcher block filter arrays for earth observation applications

Weber

Lappschies

Best

et al. 2023

International Conference on Space Optics — ICSO 2022

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Multispectral earth observation is done using selected discrete filter channels. The optical filtering is typically accomplished using optical thin film filters. These filters can be placed in filter wheels or as an array directly in front of the detector. For compact system designs filter arrays are preferred. The manufacturing of filter arrays can be done by two different approaches called monolithic array and butcher block. Typical optical requirements for such filters are for example a filter transmission of above 90% and an out-of-band blocking in OD6 range.

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The Multi Angle Polarimeter (MAP) on board ESA’s Copernicus Carbon Dioxide Monitoring mission (CO2M)

Cited by 9 publications

References 3 publications

A multispectral polarimetric instrument concept based on metasurface filters

A multispectral polarimetric instrument concept based on metasurface filters

Status on the development of the Copernicus CO2M mission: monitoring anthropogenic carbon dioxide from space

Manufacturing of monolithic and butcher block filter arrays for earth observation applications

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