Herschel/HIFI In-flight commissioning and performance
Paper i proceeding, 2010

The Herschel Space Observatory was successfully launched on the 14th of May, 2009, lifting into space the Heterodyne Instrument for the Far-Infrared (HIFI). After the standard early orbit operations on the Space-craft, the instrument was switched on for the first time on the 24th of May, kicking off an instrument Commissioning period of more than a month and a half. We present here the outcome of this Commissioning campaign, including the measured in-flight performance of the instrument. Among the challenges encountered during this period was the need to optimize the stability of the signal provided by the Local Oscillator (LO) chains in some of the frequency bands, in particular that covering the singly Ionized Carbon (C+) line at the upper edge of the HIFI range, and one of the backbones of the science program of the instrument. The same concept also allowed significant improvements in the upper end of the 3b LO chain. Another noticeable achievement was the very good co-alignment measured between the mixer beams in the respective H and V polarizations offered by HIFI, allowing for more than a simple build-in redundancy, as the observing efficiency will really benefits from the combination of the two mixers.

Instrument commissioning

Chains

Heterodyne instruments

Mixers (machinery)

Frequency bands

Observing efficiency

Build-in redundancy

In-flight performance

Herschel space observatories

C (programming language)

Local oscillators

Optimize the stabilities

Instruments

Författare

D. Teyssier

European Space Astronomy Centre

C. Risacher

SRON Netherlands Institute for Space Research

P. Dieleman

SRON Netherlands Institute for Space Research

W. Laauwen

SRON Netherlands Institute for Space Research

A. de Jonge

SRON Netherlands Institute for Space Research

J. Braine

Laboratoire d'Astrophysique de Bordeaux

M. Caris

Max Planck-institutet

O. Coeur-Joly

Universite de Toulouse

B. Delforge

LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres

F. Helmich

SRON Netherlands Institute for Space Research

F. Herpin

Laboratoire d'Astrophysique de Bordeaux

R. Higgins

Maynooth University

W. Jellema

SRON Netherlands Institute for Space Research

T. Klein

Max Planck-institutet

J. Kooi

California Institute of Technology

C. Leinz

Max Planck-institutet

K. Edwards

SRON Netherlands Institute for Space Research

A. P. Marston

European Space Astronomy Centre

P. Morris

California Institute of Technology

Michael Olberg

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

V. Ossenkopf

Universitat zu Koln

J. C. Pearson

Jet Propulsion Laboratory, California Institute of Technology

P. Roelfsema

SRON Netherlands Institute for Space Research

R. Shipman

SRON Netherlands Institute for Space Research

21st International Symposium on Space Terahertz Technology 2010, ISSTT 2010; Oxford; United Kingdom; 23 March 2010 through 25 March 2010

23-28

Ämneskategorier

Astronomi, astrofysik och kosmologi

ISBN

978-161782362-6