The FCI on board MTG : optical design and performances

Ouaknine, Julien; Viard, Thierry; Napierala, B.; Foerster, U.; Fray, Sebastian; Hallibert, Pascal; Durand, Yannig; Imperiali, Stephan; Pelouas, P.; Rodolfo, Jacques; Riguet, F.; Carel, Jean-Louis

doi:10.1117/12.2304144

Cited by 8 publications

(8 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For ECO, we will adopt similar filters, listed in Table 2. The six ECO filter spectral responses are also similar to the filter responses used for the SEVIRI/MSG [34] and FCI/MTG [35] instruments.…”

Section: Multispectral Thermal Camerasmentioning

confidence: 89%

A Multispectral Camera Suite for the Observation of Earth’s Outgoing Radiative Energy

Dewitte,

Abdul Nazar,

Zhang

et al. 2023

Remote Sensing

View full text Add to dashboard Cite

As part of the Earth Climate Observatory space mission concept for the direct observation from space of the Earth Energy Imbalance, we propose an advanced camera suite for the high-resolution observation of the Total Outgoing Radiation of the Earth. For the observation of the Reflected Solar Radiation, we propose the use of two multispectral cameras covering the range from 400 to 950 nm, with a nadir resolution of 1.7 km, combined with a high-resolution RGB camera, with a nadir resolution of 0.57 km. For the observation of the Outgoing Longwave Radiation, we propose the use of six microbolometer cameras, with each a spectral bandwidth of 1 μm in the range from 8 to 14 μm, with a nadir resolution of 2.2 km.

show abstract

Section: Multispectral Thermal Camerasmentioning

confidence: 89%

A Multispectral Camera Suite for the Observation of Earth’s Outgoing Radiative Energy

Dewitte,

Abdul Nazar,

Zhang

et al. 2023

Remote Sensing

View full text Add to dashboard Cite

show abstract

“…For a detailed presentation of the FCI optical design, refer to [1]. The FCI is composed of the following optical subsystems :…”

Section: Instrument Optical Architecturementioning

confidence: 99%

FCI PFM optical test results

Ouaknine

Gaudin-Delrieu

Liotard

et al. 2021

International Conference on Space Optics — ICSO 2020

View full text Add to dashboard Cite

Meteosat Third Generation is the next ESA Program of Earth Observation dedicated to accurate prediction of meteorological phenomena and climate monitoring. The satellites will be operating from the Geostationary orbit using a 3-axes stabilized platform. The main instrument is called the Flexible Combined Imager (FCI), currently under development by Thales Alenia Space France, the PFM being integrated and tested in our Cannes facilities. This instrument will provide full images of the Earth every 10 minutes in 16 spectral channels between 0.44 and 13.3 µm, with a ground resolution ranging from 0.5 km to 2 km. The FCI is composed of a Korsch telescope developed by OHB, followed by an assembly of lenses and detectors called the Spectral Separation and Detection Assembly (SSDA) which is integrated by Thales Alenia Space. Both the telescope and SSDA have been separately tested as sub-systems before being integrated. This article will describe the principle and results of the optical tests performed on these sub-systems. In particular the telescope WFE, focal length and line of sight have been proved to be compliant to the respective success criteria. Concerning the SSDA, we will present the results of MTF measurements, co-registration between spectral channels and polarization, which were also all found compliant to their respective success criterion. Stray-light for both the telescope and SSDA has been characterized on-ground in order to provide the input necessary for the development of image correction algorithms. During the first half of 2020, these two successfully tested sub-systems were integrated together to build the FCI PFM, which will undergo optical vacuum testing at the timeframe of beginning 2021 before being delivered to the satellite.

show abstract

“…An example of the effect that a broad-band mirror can induce in a telescope (TMA with intermediate focal plane) is analyzed using the 46-layer mirror of Fig 4 for the small folding mirror before the focal plane. This type of telescope is largely used in space instrumentation, as for instance for the IRS and FCI instruments 19 of MTG (Meteosat Third Generation). However, it is important to clarify that the mentioned instruments do not make use of such specific coating that is considered here just as an example.…”

Section: Example Of Application To a Telescopementioning

confidence: 99%

Wavefront control in the design of narrow-and broad-band optical coatings

Piegari

Sytchkova

Taccola

2019

International Conference on Space Optics — ICSO 2018

View full text Add to dashboard Cite

The wavefront distortion induced by some optical coatings has often been underestimated with serious consequences in the performance of optical instruments. The typical approach to face such inconvenience consists in modifying the shape of the coated optics by compensating either the bending induced by stress or the geometrical thickness variations in nonuniform coatings. A relevant contribution to the wavefront distortion can also be given by the interference in the coating layers and a standard approach to overcome such problem is not available. In this work the wavefront deformation that is due to the spatial non-uniformity of thin-film optical coatings is analyzed, with the aim of identifying simple structures in which the influence of thickness non-uniformity on the wavefront shape is minimized. Some examples are reported especially for high-reflectance coatings.

show abstract

The FCI on board MTG : optical design and performances

Cited by 8 publications

References 0 publications

A Multispectral Camera Suite for the Observation of Earth’s Outgoing Radiative Energy

A Multispectral Camera Suite for the Observation of Earth’s Outgoing Radiative Energy

FCI PFM optical test results

Wavefront control in the design of narrow-and broad-band optical coatings

Contact Info

Product

Resources

About