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RTS effect detection in Sentinel-4 data

Candeias, Henrique and Gnata, Xavier and Harlander, Maximilian and Hermsen, Markus and Hohn, Rüdiger and Riedl, Stefan and Skegg, Michael and Williges, Christian and Reulke, Ralf (2017) RTS effect detection in Sentinel-4 data. International Society for Optics and Photonics. Earth Observing Systems, San Diego, USA. DOI: 10.1117/12.2274310

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Abstract

The future ESA Earth Observation Sentinel-4/UVN is a high resolution spectrometer intended to fly on board a Meteosat Third Generation Sounder (MTG-S) platform, placed in a geostationary orbit. The main objective of this optical mission is to continuously monitor the air quality over Europe in near-real time. The Sentinel-4/UVN instrument operates in three wavelength bands: Ultraviolet (UV: 305-400 nm), Visible (VIS: 400- 500 nm) and Near-infrared (NIR: 750-775 nm). Two dedicated CCD detector have been developed to be used in the Focal Plane Subsystems (FPS), one for the combined UV and VIS band, the other covering the NIR band. Being a high resolution spectrometer with challenging radiometric accuracy requirements, both on spectral and spatial dimensions, an effect such the Random Telegraph Signal (RTS) can represent a relevant contribution for the complete system accuracy. In this work we analyze the RTS effect on data acquired during the FPS testing campaign with qualification models for the Sentinel-4/UVN detectors. This test campaign has been performed in late 2016. The strategy for the impact assessment of RTS is to measure the effect at room temperature and then to extrapolate the results to the at instrument operational temperature. This way, very-long lasting data acquisitions could be avoided since the RTS frequency is much lower at cryogenic temperatures. A reliable technique for RTS effect detection has been developed in order to characterize the signal levels amplitude and occurrence frequencies (flipping rate). We demonstrate the residual impact of the RTS on the global In-Orbit Sentinel-4/UVN instrument performance and products accuracy.

Item URL in elib:https://elib.dlr.de/114326/
Document Type:Conference or Workshop Item (Speech)
Title:RTS effect detection in Sentinel-4 data
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Candeias, HenriqueAirbus DSUNSPECIFIED
Gnata, XavierAirbus DSUNSPECIFIED
Harlander, MaximilianAirbus DSUNSPECIFIED
Hermsen, MarkusAirbus DSUNSPECIFIED
Hohn, RüdigerAirbus DSUNSPECIFIED
Riedl, StefanAirbus DSUNSPECIFIED
Skegg, MichaelAirbus DSUNSPECIFIED
Williges, Christianchristian.williges (at) dlr.deUNSPECIFIED
Reulke, RalfRalf.Reulke (at) dlr.deUNSPECIFIED
Date:2017
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:10402
DOI :10.1117/12.2274310
Publisher:International Society for Optics and Photonics
Series Name:SPIE Optical Engineering + Applications
Status:Published
Keywords:Sensors, Ultraviolet radiation, CCD image sensors, Charge-coupled devices, Data acquisition, Data modeling, Detector development
Event Title:Earth Observing Systems
Event Location:San Diego, USA
Event Type:international Conference
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Optische Sensorik - Theorie, Kalibration, Verifikation
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Optical Sensor Systems
Deposited By: Reulke, Prof. Dr. Ralf
Deposited On:21 Sep 2017 13:21
Last Modified:21 Sep 2017 13:21

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