Articles | Volume 10, issue 5
Atmos. Meas. Tech., 10, 1957–1986, 2017

Special issue: Ten years of Ozone Monitoring Instrument (OMI) observations...

Atmos. Meas. Tech., 10, 1957–1986, 2017

Research article 01 Jun 2017

Research article | 01 Jun 2017

In-flight performance of the Ozone Monitoring Instrument

V. M. Erik Schenkeveld1, Glen Jaross2, Sergey Marchenko3, David Haffner3, Quintus L. Kleipool1, Nico C. Rozemeijer4, J. Pepijn Veefkind1,5, and Pieternel F. Levelt1,5 V. M. Erik Schenkeveld et al.
  • 1Royal Netherlands Meteorological Institute (KNMI), De Bilt, the Netherlands
  • 2NASA Goddard Space Flight Center, Greenbelt, Maryland, USA
  • 3Science Systems and Applications Inc., Lanham, Maryland, USA
  • 4TriOpSys BV, Utrecht, the Netherlands
  • 5Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft, the Netherlands

Abstract. The Dutch–Finnish Ozone Monitoring Instrument (OMI) is an imaging spectrograph flying on NASA's EOS Aura satellite since 15 July 2004. OMI is primarily used to map trace-gas concentrations in the Earth's atmosphere, obtaining mid-resolution (0.4–0.6 nm) ultraviolet–visible (UV–VIS; 264–504 nm) spectra at multiple (30–60) simultaneous fields of view. Assessed via various approaches that include monitoring of radiances from selected ocean, land ice and cloud areas, as well as measurements of line profiles in the solar spectra, the instrument shows low optical degradation and high wavelength stability over the mission lifetime. In the regions relatively free from the slowly unraveling row anomaly (RA) the OMI irradiances have degraded by 3–8 %, while radiances have changed by 1–2 %. The long-term wavelength calibration of the instrument remains stable to 0.005–0.020 nm.

Short summary
The Ozone Monitoring Instrument (OMI) has been flying on NASA’s EOS Aura satellite since July 15, 2004. It has measured the concentration of trace gasses in the atmosphere, like ozone, NO2 and SO2. This article describes the trend in performance and calibration parameters of OMI during 12 years of flight. The degradation of the CCD detectors, solar diffusers, spectral calibration and row anomaly are shown. The instrument shows overall degradation that is better than expected.