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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/amt-2019-56
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-2019-56
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 05 Mar 2019

Research article | 05 Mar 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Measurement Techniques (AMT).

Validation of SOFIE nitric oxide measurements

Mark E. Hervig1, Benjamin T. Marshall2, Scott M. Bailey3, David E. Siskind4, James M. Russell III5, Charles Bardeen6, Kaley A. Walker7, and Bernd Funke8 Mark E. Hervig et al.
  • 1GATS, Driggs, Idaho, USA
  • 2GATS, Hampton, Virginia, USA
  • 3Virginia PolytechnicInstitute, Blacksburg, Virginia, USA
  • 4Space Science Division, Naval Research Laboratory, Washington, DC, USA
  • 5Hampton University,Hampton, Virginia, USA
  • 6NCAR, Boulder, Colorado, USA
  • 7Department of Physics, University of Toronto, Toronto, Canada
  • 8Instituto de Astrofísica de Andalucía, CSIC, Granada, Spain

Abstract. Nitric oxide (NO) measurements from the Solar Occultation for Ice Experiment (SOFIE) are validated through detailed uncertainty analysis and comparisons with independent observations. SOFIE was compared with coincident satellite measurements from the Atmospheric Chemistry Experiment (ACE) – Fourier Transform Spectrometer (FTS) instrument, and the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) instrument. The comparisons indicate mean differences of less than ~ 50 % for altitudes from roughly 50 to 105 km for SOFIE spacecraft sunrise, and 50 to 140 km for SOFIE sunsets. Comparisons of NO time series show a high degree of correlation between SOFIE and both ACE and MIPAS for altitudes below ~ 130 km, indicating that measured NO variability in time is robust. SOFIE uncertainties increase below ~ 80 km due to interfering H2O absorption, and from signal correction uncertainties which are larger for spacecraft sunrise compared to sunset. These errors are sufficiently large in sunrises that reliable NO measurements are infrequent below ~ 80 km.

Mark E. Hervig et al.
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Short summary
The Solar Occultation for Ice Experiment (SOFIE) has measured nitric oxide (NO) from satellite since 2007. The observations are validated through error analysis and comparisons with other satellite observations. Calculated SOFIE NO uncertainties are less than 50 % for altitudes from 40 to 140 km. SOFIE agrees with other measurements to within 50 % for altitudes from roughly 50 to 105 km for spacecraft sunrise and 50 to 140 km for sunsets.
The Solar Occultation for Ice Experiment (SOFIE) has measured nitric oxide (NO) from satellite...
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