A novel spectrometer concept for microwave remote sensing of middle atmospheric trace constituents

Stefan C. Müller; Niklaus Kämpfer; Christian Monstein; Hansueli Meyer; Axel Murk; Vladimir Vasic

doi:10.1117/12.627655

1 November 2005 A novel spectrometer concept for microwave remote sensing of middle atmospheric trace constituents

Stefan C. Müller, Niklaus Kämpfer, Christian Monstein, Hansueli Meyer, Axel Murk, Vladimir Vasic

Proceedings Volume 5979, Remote Sensing of Clouds and the Atmosphere X; 59790X (2005) https://doi.org/10.1117/12.627655
Event: SPIE Remote Sensing, 2005, Bruges, Belgium

Abstract

The Institute of Applied Physics of the University of Berne is active in the filed of remote sensing of middle atmospheric trace gases such as ozone and water vapor by microwave radiometry. From the measured pressure broadened spectral lines it is possible to retrieve the vertical distribution of the observed species. One of the radiometers is operating from an aircraft of the Swiss Air Force. For the spectral analysis it uses a broadband acousto-optical spectrometer with a total bandwidth of 1 GHz with 1725 channels, which allows retrievals of altitude profiles from about the flight height up to 60 km. Unfortunately acousto-optical spectrometers proved to be critical under conditions encountered in an aircraft. For this reason the novel approach of using digital Fast Fourier Transform (FFT) spectrometers with a total bandwidth of 25 MHz and with the option to select either 2048 or 4096 channels and another FFT spectrometer with 16384 channels on 1 GHz bandwidth was chosen. In this paper we present first measurements of atmospheric trace constituents using this novel approach with digital FFT spectrometers. We report on critical instrumental aspects such as system stability and linearity that are of fundamental importance for this application.

Citation Download Citation

Stefan C. Müller, Niklaus Kämpfer, Christian Monstein, Hansueli Meyer, Axel Murk, and Vladimir Vasic "A novel spectrometer concept for microwave remote sensing of middle atmospheric trace constituents", Proc. SPIE 5979, Remote Sensing of Clouds and the Atmosphere X, 59790X (1 November 2005); https://doi.org/10.1117/12.627655

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available