On-ground re-calibration of the GOME-2 satellite spectrometer series
| Autor: | Bilgehan Gür, Marcello Sallusti, Amir Vosteen, Gerard Otter, Sanneke Brinkers, Niels Dijkhuizen, Pepijn Kenter, Annalisa Cappani, Dana Tomuta, Rubes Veratti |
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| Rok vydání: | 2017 |
| Předmět: |
Earth observation
Atmospheric chemistry Digital storage Satellites Calibration (statistics) 2015 Nano Technology Geometry Orbits Climate models Ozone Earth observations Satellite spectrometers Radiometry Radiometric calibrations Radiometric calibration Remote sensing TS - Technical Sciences Spectrometer On-ground calibration Slit-function Trace gas Global ozone monitoring experiments Calibration Air quality Atmospheric research Near real-time datum Environmental science Climate model Satellite SSE - Space Systems Engineering OPT - Optics Air quality forecasting |
| Zdroj: | Armandillo, E.Cugny, B.Karafolas, N., International Conference on Space Optics 2012, ICSO 2012. 9 October 2012 through 12 October 2012, 10564 |
| DOI: | 10.1117/12.2309063 |
| Popis: | The Global Ozone Monitoring Experiment-2[1] (GOME-2) represents one of the European instruments carried on board the MetOp satellite within the ESA’s “Living Planet Program”. Consisting of three flight models (FM’s) it is intended to provide long-term monitoring of atmospheric ozone and other trace gases over a time frame of 15-20 years, thus contributing valuable input towards climate and atmospheric research and providing near real-time data for use in air quality forecasting. The ambition to achieve highly accurate scientific results requires a thorough calibration and characterization of the instrument prior to launch. These calibration campaigns were performed by TNO in Delft in the Netherlands, in the “Thermal Vacuum Calibration Facility” of the institute. Due to refurbishment and / or storage of the instruments over a period of a few years, several re-calibration campaigns were necessary. These re-calibrations provided the unique opportunity to study the effects of long term storage and build up statistics on the instrument as well as the calibration methods used. During the re-calibration of the second flight model a difference was found in the radiometric calibration output, which was not understood initially. In order to understand the anomalies on the radiometry, a deep investigation was performed using numerous variations of the setup and different sources. The major contributor was identified to be a systematic error in the alignment, for which a correction was applied. Apart from this, it was found that the geometry of the sources influenced the results. Based on the calibration results combined with a theoretical geometrical hypothesis inferred that the on-ground calibration should mimic as close as possible the in-orbit geometry |
| Databáze: | OpenAIRE |
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