Abstract
The Ozone Layer Monitoring Experiment (OLME) on board the FASAT-Bravo microsatellite, launched in July 1998, observed backscattered UV to retrieve total atmospheric ozone concentrations using two instruments: the Ozone Ultraviolet Backscatter Imager (OUBI) and Ozone Mapping Detector (OMAD). Initial results from this experiment have shown good qualitative agreement with NASA’s Total Ozone Mapping Spectrometer (TOMS) cite ch09:bib01. Recent studies on OMAD and TOMS data found quantitative agreement in the radiances and indicated the detection of the volcanic eruption plume of Nyamuragira volcano (due to its sulphur dioxide content)[2].
A new analysis of OMAD data using an improved version of the simplified algorithm to find ozone content has been developed and tested. Multiple days were analysed using composites of up to 15 days and ozone contents ranging from 150 DU to 400 DU. Recent findings indicate a relative error of between 3–10 % in the vertical column content of ozone given in Dobson Units (DU) when compared with TOMS-Earth Probe data, depending on the geographical area analysed from the tropics to mid-latitudes.
The results obtained are in good agreement overall, despite the instrumental differences between OMAD and TOMS. The potential of small satellites for atmospheric missions is discussed, including factors to consider when planning such missions.
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References
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Fernandez-Saldivar, J.A., Underwood, C.I., Mackin, S. Low-cost microsatellite UV instrument suite for monitoring ozone and volcanic sulphur dioxide. in Remote Sensing of Clouds and the Atmosphere XI. 2006. Stockholm, Sweden: SPIE.
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Fernandez-Saldivar, J.A., Underwood, C.I., Mackin, S. (2008). Comparison of Atmospheric Ozone Measurements Between NASA’s Total Ozone Mapping Spectrometer (TOMS) and the FASAT-BRAVO Ozone Mapping Detector (OMAD). In: Sandau, R., Röser, HP., Valenzuela, A. (eds) Small Satellites for Earth Observation. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-6943-7_9
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DOI: https://doi.org/10.1007/978-1-4020-6943-7_9
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