14 Jan 2022
14 Jan 2022
Status: a revised version of this preprint was accepted for the journal AMT.

OMI Collection 4: establishing a 17-year long series of detrended L1b data

Quintus Kleipool1, Nico Rozemeijer1,2, Mirna van Hoek1, Jonatan Leloux1,2, Erwin Loots1, Antje Ludewig1, Emiel van der Plas1, Daley Adrichem1,2, Raoul Harel1,2, Simon Spronk1,2, Mark ter Linden1,3, Glen Jaross4, David Haffner4, Pepijn Veefkind1, and Pieternel Levelt5 Quintus Kleipool et al.
  • 1Royal Netherlands Meteorological Institute (KNMI), De Bilt, The Netherlands
  • 2TriOpSys B.V., Utrecht, The Netherlands
  • 3Science and Technology (S[&]T), Delft, The Netherlands
  • 4NASA Goddard Space Flight Center (GSFC), Greenbelt, Maryland, United States
  • 5National Center for Atmospheric Research (NCAR), Boulder, Colorado, United States

Abstract. The Ozone Monitoring Instrument (OMI) was launched on July 15, 2004, with an expected mission lifetime of 5 years. After more than 17 years in orbit the instrument is still functioning satisfactorily, and in principle can continue doing so for many years more. In order to continue the datasets acquired by OMI and the Microwave Limb Sounder the mission was extended up to at least 2023.

Actions have been taken to ensure the proper functioning of the OMI instrument operations, the data processing, and the calibration monitoring system until the eventual end of the mission. For the data processing a new level 0 to level 1b data processor was built based on the recent developments for Tropospheric Monitoring Instrument (TROPOMI). With corrections for the degradation of the instrument now included, it is feasible to generate a new data collection to supersede the current collection 3 data products.

This paper describes the differences between the collection 3 and collection 4 data. It will be shown that the collection 4 L1b data is a clear improvement with respect to the previous collections. By correcting for the gentle optical and electronic aging that has occurred over the past 17 years, OMI's ability to make trend-quality ozone measurements has further improved.

Quintus Kleipool et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on amt-2021-430', Anonymous Referee #1, 26 Jan 2022
    • AC1: 'Reply on RC1', Antje Ludewig, 18 Mar 2022
  • RC2: 'Comment on amt-2021-430', Anonymous Referee #2, 27 Jan 2022
    • AC2: 'Reply on RC2', Antje Ludewig, 18 Mar 2022
  • RC3: 'Comment on amt-2021-430', Ruediger Lang, 17 Feb 2022
    • AC4: 'Reply on RC3', Antje Ludewig, 18 Mar 2022

Quintus Kleipool et al.

Quintus Kleipool et al.


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Short summary
A new collection 4 dataset for the OMI mission has been established to supersede the current collection 3 Level 1b data series. This dataset is produced with a newly developed L01b data processor based on the TROPOMI L01b processor. The collection 4 L1b data has a similar output format as the TROPOMI L1b data, for easy connection of the two data series. Many insights of the TROPOMI algorithms were included, as well as insights learned from the usage of OMI collection 3 data.