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Characterisation of the TELIS autocorrelator spectrometer

Vogt, Peter and Birk, Manfred and Wagner, Georg and Geiger, Felix and De Lange, Gerd and Golstein, Hans and Kiselev, Oleg and Emrich, Anders (2010) Characterisation of the TELIS autocorrelator spectrometer. 21st International Symposium on Space Terahertz Technology, 23.-25. März 2010, Oxford, England.

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Abstract

The balloon borne cryogenic heterodyne spectrometer TELIS allows limb sounding of the Earth's atmosphere within the submillimeter and far-infrared spectral range. The instrument was developed by a consortium of major European institutes that includes the Space Research Organisation of the Netherlands (SRON), the Rutherford Appleton Laboratory (RAL) in the United Kingdom and the Deutsche Zentrum für Luft- und Raumfahrt (DLR) in Germany (lead institute). TELIS offers three channels (450-650 GHz, 499-503 GHz, 1.79 – 1.870 THz ) and utilises state-of-the-art superconducting heterodyne technology [1]. As a spectrometer a 3-level autocorrelator with complex I-Q-sampling technique is used. It offers the advantage of low energy consumption, being light weight and has a resolution better than 2.5 MHz. A similar spectrometer without I-Q-technique has been successfully used on the ODIN satellite [2]. During gas cell characterisation measurements of the TELIS autocorrelator spectrometer however, discrepancies occurred between measured and expected spectra. To investigate and quantify the observed errors, the TELIS autocorrelator spectrometer was referenced against a well known FFT spectrometer [3] in simultaneous measurements. In order to generate well controlled input signals, a 50 Ohm load plunged into temperature stable slush-baths ranging from 77 K to 273 K has been used. The obtained input signal was split, processed and simultaneously fed into both spectrometer inputs for spectral intercomparison. We will show and discuss the obtained experimental results for radiometric characterisation of the TELIS autocorrelator spectrometer. REFERENCES [1] DEVELOPMENT AND CHARACTERIZATION OF THE BALLOON BORNE INSTRUMENT TELIS (TErahertz and Submm LImb Sounder): 1.8 THz RECEIVER, N. Suttiwong, M. Birk, G. Wagner, M. Krocka, M. Wittkamp, P. Haschberger, P. Vogt, F. Geiger, in Proceedings in press, 19th ESA Symposium on European Rocket and Balloon Programmes and Related Research, 07. - 11. Juni 2009, Bad Reichenhall, Germany. [2] H. L. Nordh, F. von Schéele, U. Frisk, K. Ahola, R. S. Booth, P. J. Encrenaz, Å. Hjalmarson, D. Kendall, E. Kyrölä, S. Kwok, A. Lecacheux, G. Leppelmeier, E. J. Llewellyn, K. Mattila, G. Mégie, D. Murtagh, M. Rougeron, and G. Witt, “The Odin orbital observatory”, in A&A 402, L21–L25 (2003). [3] Klein, B., Philipp, S.D., Güsten, R. et al., "A new generation of spectrometers for radio astronomy: Fast Fourier Transform Spectrometer", 2006, Proc. of the SPIE, Millimeter and Submillimeter Detectors and Instrumentation for Astronomy III. Vol. 6275, pp. 627511.

Document Type:Conference or Workshop Item (Poster)
Title:Characterisation of the TELIS autocorrelator spectrometer
Authors:
AuthorsInstitution or Email of Authors
Vogt, PeterDLR
Birk, ManfredUNSPECIFIED
Wagner, GeorgUNSPECIFIED
Geiger, FelixUNSPECIFIED
De Lange, GerdSRON
Golstein, HansUNSPECIFIED
Kiselev, OlegUNSPECIFIED
Emrich, AndersOmnysis
Date:March 2010
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Autocorrelator, spectrometer, characterisation, intercomparison, TELIS
Event Title:21st International Symposium on Space Terahertz Technology
Event Location:Oxford, England
Event Type:international Conference
Event Dates:23.-25. März 2010
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Projekt TELIS (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Experimental Methods
Deposited By: Peter Vogt
Deposited On:03 May 2010 09:20
Last Modified:03 May 2010 09:20

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