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The effect of sideband ratio on line intensity for Herschel/HIFI

R. Higgins ; D. Teyssier ; C. Borys ; J. Braine ; C. Comito ; B. Delforge ; F. Helmich ; Michael Olberg (Institutionen för rymd- och geovetenskap, Onsala rymdobservatorium) ; V. Ossenkopf ; J. Pearson ; R. Shipman
Experimental Astronomy (0922-6435). Vol. 37 (2014), 2, p. 433-452.
[Artikel, refereegranskad vetenskaplig]

The Heterodyne Instrument for the Far Infrared (HIFI) on board the Herschel Space Observatory is composed of a set of fourteen double sideband mixers. We discuss the general problem of the sideband ratio (SBR) determination and the impact of an imbalanced sideband ratio on the line calibration in double sideband heterodyne receivers. The HIFI SBR is determined from a combination of data taken during pre-launch gas cell tests and in-flight. The results and some of the calibration artefacts discovered in the gas cell test data are presented here along with some examples of how these effects appear in science data taken in orbit.

Nyckelord: HIFI, Herschel, Heterodyne, Calibration, Sideband ratio



Denna post skapades 2014-08-29. Senast ändrad 2014-09-02.
CPL Pubid: 202114

 

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Institutioner (Chalmers)

Institutionen för rymd- och geovetenskap, Onsala rymdobservatorium (2010-2017)

Ämnesområden

Astronomi

Chalmers infrastruktur