Title
Radiometric calibration of the gome-2 instrument
Author
Otter, G.C.J.
Dijkhuizen, N.
Vosteen, L.L.A.
Brinkers, S.
Gür, B.
Kenter, P.
Contributor
Urbach, H.P. (editor)
Zhang, G. (editor)
Publication year
2017
Abstract
The Global Ozone Monitoring Experiment-2(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 with highly specialised sources. 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.
Subject
2015 Nano Technology
OPT - Optics SSE - Space Systems Engineering
TS - Technical Sciences
High Tech Systems & Materials
Electronics
Industrial Innovation
Calibration
GOME-2
METOP
Radiometry
Spectrometer
UV
VIS
NIR
Stray-light
To reference this document use:
http://resolver.tudelft.nl/uuid:a5b70d0c-cb66-4609-a8d6-797da4b524a3
TNO identifier
753497
Publisher
Springer
ISBN
9783319491837
ISSN
0930-8989
Source
3rd International Symposium of Space Optical Instruments and Applications, 26-29 June 2016, 192, 493-504
Series
Springer Proceedings in Physics
Document type
conference paper