Preprints
https://doi.org/10.5194/amt-2021-121
https://doi.org/10.5194/amt-2021-121

  27 May 2021

27 May 2021

Review status: this preprint is currently under review for the journal AMT.

Introduction to the ringing effect in satellite hyperspectral atmospheric spectrometry

Pierre Dussarrat1, Bertrand Theodore1, Dorothee Coppens1, Carsten Standfuss2, and Bernard Tournier2 Pierre Dussarrat et al.
  • 1EUMETSAT, Eumetsat-Allee 1, 64295 Darmstadt, Germany
  • 2SPASCIA, 10 Avenue de l’Europe, 31520 Ramonville-Saint-Agne, France

Abstract. Atmospheric remote spectrometry from space has become in the last 20 years a key component of the Earth monitoring system: their large coverage and deci-kelvin stability have demonstrated their usefulness for weather prediction, atmospheric composition monitoring as well as climate monitoring. It is thus critical to investigate the possible sources of errors associated to this technique. One of them is the so-called "ringing error" that appears in Fourier transform spectrometers when the instrument transmission varies at the scale of the spectral resolution. This paper exposes the theoretical basis of this particular type of radiometric uncertainty. Its sensitivity to instrumental parameters as well as the impact on the radiometrically calibrated measurements is assessed in the context of atmospheric infrared sounding using Fourier transform spectrometers. It is shown that this error is an intrinsic feature of such instruments that could safely be ignored in early-generation instruments but will have to be taken into account in the new generation ones as it can yield a significant degradation of the radiometric error budget.

Pierre Dussarrat et al.

Status: open (until 30 Jul 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on amt-2021-121', Anonymous Referee #1, 27 May 2021 reply
    • AC1: 'Reply on RC1', Dorothée Coppens, 15 Jun 2021 reply
      • RC2: 'Reply on AC1', Anonymous Referee #1, 16 Jun 2021 reply

Pierre Dussarrat et al.

Pierre Dussarrat et al.

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Short summary
This paper is looking at an common instrument effect to all hyperspectral infrared sounders. It understands the physics behind and proves an analytical analysis. This will be followed by a paper proposing an efficient correction. We have done this research to prepare our future missions, the InfraRed Sounder on the Meteosat Third Generation.