Dr. Kaustav Ghose Profile

Dr. Kaustav Ghose

at European Space Research and Technology Ctr

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Author

Publications (4)

Proceedings Article | 12 July 2023 Open Access

MSI (Multi Spectral Imager) performance check at integrated EarthCARE satellite system

L. Zimmermann, C. Haas, T. Canas, K. Ghose, K. Wallace, K.W. Kruse, M. Sauer

Proceedings Volume 12777, 127771F (2023) https://doi.org/10.1117/12.2689286

KEYWORDS: Clouds, Equipment, Satellites, Calibration, Aerosols, Astronomical imaging, Atmospheric particles, Imaging systems, Cameras, Temperature metrology

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EarthCARE (Earth Clouds, Aerosols and Radiation Explorer) is the 6th Earth Explorer mission of ESA‘s “Living Planet Earth“ Program. The EarthCARE satellite is about to start its environmental test campaign in autumn 2022. This Core Explorer mission (Core Explorer missions that focus on scientific objectives of a large scientific community) is a large and very complex Earth Explorer mission with 4 Instruments on board. It improves the representation and understanding of Earth's radiative balance for climate and numerical forecast models by advancing our understanding of the role that clouds and aerosols play in reflecting incident solar radiation back into space and trapping infrared radiation emitted from Earth's surface. To achieve this goal, EarthCare is hosting a Multi-Spectral Imager (MSI), an Atmospheric Lidar (ATLID) and a Broad-Band Radiometer (BBR) under European ESA authority and a Cloud Profiling Radar (CPR) under JAXA (Japan Aerospace Exploration Agency) authority. The EarthCare MSI Instrument consists in two camera units, the TIR (Thermal Infrared Radiometer) part with 3 channels (Band7 [8800nm], Band8 [10800nm] and Band9 [12000nm]) and an VNS (Visible, Near-infrared and Short-wave infrared) part with 4 channels (VIS [670nm], NIR [867nm], SWIR1 [1654nm] and SWIR2 [2214nm]) and by an overall weight of around 50kg (including control units, harness and thermal hardware). The Instrument performance qualification consist in a full performance verification testing on instrument level and of regular instrument performance checks (IPCs) on Satellite level after Instrument integration. This performance checks for the MSI concentrate on a simplified test approach and are regularly repeated along the entire S/C AIT campaign until launch. The test results will be compared with first reference IPC measurements from instrument Level. MSI IPC definition does focus on radiometric key performance parameters as noise and responsivity to identify optical or detection chain degradations, as well as detector dead pixels. This paper will present the MSI IPC approach for EarthCare and the first ambient results from S/C Level MSI IPCs performed so far. Furthermore this paper will show that the ambient S/C Level MSI IPC results are in line with the ambient IPC on instrument level but it will also shows good agreement with thermal vacuum results on Instrument level.

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Proceedings Article | 12 July 2023 Open Access

ATLID (ATmospheric LIDAR) integration and initial test results on EarthCARE satellite

C. Haas, T. Belhadj, K.W. Kruse, G. de Villèle, M. Sauer, F. Chassat, B. Corselle, G. Tzeremes, J. Pereira do Carmo, K. Ghose, K. Wallace

Proceedings Volume 12777, 127771I (2023) https://doi.org/10.1117/12.2689292

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EarthCARE is the 3rd Earth Explorer Core Mission of the European Space Agency (ESA) Living Planet Program, with the fundamental objective of improving understanding of the processes involving clouds, aerosols and radiation in the Earth’s atmosphere [2] [3] [5] [6]. EarthCARE data products will be used to improve climate and numerical weather prediction. The data products include vertical profiles of aerosols, liquid water and ice, observations of cloud distribution and vertical motion within clouds, and will allow the retrieval of profiles of atmospheric radiative heating and cooling [4]. For above mission objective, the EarthCARE satellite hosts four complex instruments, the ATLID, (ATmospheric LIDAR from Airbus Toulouse), the CPR (Cloud Profiling Radar, from JAXA/NEC), the MSI (Multi Spectral Imager from SSTL) and the BBR (Broad Band Radiometer from TAS-UK). The instrument performance verification approach is based on (a) the full performance verification testing done on instrument level, and (b) on Instrument Performance Checks (IPCs) to be repeated periodically on instrument and satellite level. IPCs are designed to confirm that the core instrument performance as verified on instrument level does not degrade after integration on the platform and throughout the overall satellite AIT campaign until launch. Five ATLID IPCs have been defined in close cooperation between Airbus instrument and satellite prime teams, considering instrument performance verification needs as well as feasibility of IPC repetition in satellite AIT. This feasibility refers mainly to satellite AIT limitations for laser hazard protection measures, cleanliness (ISO8 environment), complexity of optical setups, need for limited test durations<1 day and more difficult instrument accessibility (instrument integrated at more than 3m height on the satellite). For the ATLID Lidar instrument, the following IPCs have been defined: (1) Transmit Laser Beam Line of Sight (LoS) stability, (2) Activation of Transmit Laser beam steering mechanism, (3) Laser pulse energy knowledge stability, (4) Overall Receive chain optical response check and (5) Detection chain total noise in darkness. IPC test definition as well as test results from instrument level and satellite level IPC testing will be presented. The trend of ATLID IPC test results is found stable along all test repetitions done until today. Additional presentation content can be accessed on the supplemental content page.

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Proceedings Article | 11 June 2021 Open Access

ESA Atmospheric LIDAR (ATLID) testing, qualification, and calibration

G. de Villele, J. Pereira do Carmo, K. Wallace, B. Corselle, T. Belhadj, P. Bravetti, A. Lefebvre, F. Chassat, T. Kanitz, K. Ghose, C. Haas

Proceedings Volume 11852, 118521J (2021) https://doi.org/10.1117/12.2599245

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Proceedings Article | 18 October 2019 Presentation

Status of the optical payloads development for the Earth Cloud Aerosol and Radiation Explorer (Conference Presentation)

Kaustav Ghose, Kotska Wallace, Joao Pereira do Carmo, Alain Lefebvre

Proceedings Volume 11151, 111510R (2019) https://doi.org/10.1117/12.2533118

KEYWORDS: Aerosols, Clouds, Atmospheric particles, Backscatter, Earth's atmosphere, LIDAR, Multispectral imaging, Knowledge management, Thermography, Infrared radiation

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