Planck pre-launch status

Calibration of the Low Frequency Instrument flight model radiometers

F. Villa, M. Sandri, P. Meinhold, Jussi Tuovinen, Jussi Varis, et al.

Research output: Contribution to journalArticleScientificpeer-review

9 Citations (Scopus)

Abstract

The Low Frequency Instrument (LFI) on-board the ESA Planck satellite carries eleven radiometer subsystems, called radiometer chain assemblies (RCAs), each composed of a pair of pseudo-correlation receivers. We describe the on-ground calibration campaign performed to qualify the flight model RCAs and to measure their pre-launch performances. Each RCA was calibrated in a dedicated flight-like cryogenic environment with the radiometer front-end cooled to 20 K and the back-end at 300 K, and with an external input load cooled to 4 K. A matched load simulating a blackbody at different temperatures was placed in front of the sky horn to derive basic radiometer properties such as noise temperature, gain, and noise performance, e.g. 1/f noise. The spectral response of each detector was measured as was their susceptibility to thermal variation. All eleven LFI RCAs were calibrated. Instrumental parameters measured in these tests, such as noise temperature, bandwidth, radiometer isolation, and linearity, provide essential inputs to the Planck-LFI data analysis.
Original languageEnglish
Number of pages14
JournalAstronomy and Astrophysics
Volume520
DOIs
Publication statusPublished - 2010
MoE publication typeA1 Journal article-refereed

Fingerprint

flight instruments
radiometers
radiometer
flight
low frequencies
calibration
assemblies
noise temperature
temperature
linearity
European Space Agency
spectral sensitivity
cryogenics
sky
isolation
receivers
bandwidth
magnetic permeability

Keywords

  • cosmic microwave background – cosmology
  • observations – space vehicles
  • instruments

Cite this

Villa, F. ; Sandri, M. ; Meinhold, P. ; Tuovinen, Jussi ; Varis, Jussi ; et al. / Planck pre-launch status : Calibration of the Low Frequency Instrument flight model radiometers. In: Astronomy and Astrophysics. 2010 ; Vol. 520.
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title = "Planck pre-launch status: Calibration of the Low Frequency Instrument flight model radiometers",
abstract = "The Low Frequency Instrument (LFI) on-board the ESA Planck satellite carries eleven radiometer subsystems, called radiometer chain assemblies (RCAs), each composed of a pair of pseudo-correlation receivers. We describe the on-ground calibration campaign performed to qualify the flight model RCAs and to measure their pre-launch performances. Each RCA was calibrated in a dedicated flight-like cryogenic environment with the radiometer front-end cooled to 20 K and the back-end at 300 K, and with an external input load cooled to 4 K. A matched load simulating a blackbody at different temperatures was placed in front of the sky horn to derive basic radiometer properties such as noise temperature, gain, and noise performance, e.g. 1/f noise. The spectral response of each detector was measured as was their susceptibility to thermal variation. All eleven LFI RCAs were calibrated. Instrumental parameters measured in these tests, such as noise temperature, bandwidth, radiometer isolation, and linearity, provide essential inputs to the Planck-LFI data analysis.",
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Planck pre-launch status : Calibration of the Low Frequency Instrument flight model radiometers. / Villa, F.; Sandri, M.; Meinhold, P.; Tuovinen, Jussi; Varis, Jussi; et al.

In: Astronomy and Astrophysics, Vol. 520, 2010.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Planck pre-launch status

T2 - Calibration of the Low Frequency Instrument flight model radiometers

AU - Villa, F.

AU - Sandri, M.

AU - Meinhold, P.

AU - Tuovinen, Jussi

AU - Varis, Jussi

AU - et al.,

N1 - Project code: 18080

PY - 2010

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N2 - The Low Frequency Instrument (LFI) on-board the ESA Planck satellite carries eleven radiometer subsystems, called radiometer chain assemblies (RCAs), each composed of a pair of pseudo-correlation receivers. We describe the on-ground calibration campaign performed to qualify the flight model RCAs and to measure their pre-launch performances. Each RCA was calibrated in a dedicated flight-like cryogenic environment with the radiometer front-end cooled to 20 K and the back-end at 300 K, and with an external input load cooled to 4 K. A matched load simulating a blackbody at different temperatures was placed in front of the sky horn to derive basic radiometer properties such as noise temperature, gain, and noise performance, e.g. 1/f noise. The spectral response of each detector was measured as was their susceptibility to thermal variation. All eleven LFI RCAs were calibrated. Instrumental parameters measured in these tests, such as noise temperature, bandwidth, radiometer isolation, and linearity, provide essential inputs to the Planck-LFI data analysis.

AB - The Low Frequency Instrument (LFI) on-board the ESA Planck satellite carries eleven radiometer subsystems, called radiometer chain assemblies (RCAs), each composed of a pair of pseudo-correlation receivers. We describe the on-ground calibration campaign performed to qualify the flight model RCAs and to measure their pre-launch performances. Each RCA was calibrated in a dedicated flight-like cryogenic environment with the radiometer front-end cooled to 20 K and the back-end at 300 K, and with an external input load cooled to 4 K. A matched load simulating a blackbody at different temperatures was placed in front of the sky horn to derive basic radiometer properties such as noise temperature, gain, and noise performance, e.g. 1/f noise. The spectral response of each detector was measured as was their susceptibility to thermal variation. All eleven LFI RCAs were calibrated. Instrumental parameters measured in these tests, such as noise temperature, bandwidth, radiometer isolation, and linearity, provide essential inputs to the Planck-LFI data analysis.

KW - cosmic microwave background – cosmology

KW - observations – space vehicles

KW - instruments

U2 - 10.1051/0004-6361/200912860

DO - 10.1051/0004-6361/200912860

M3 - Article

VL - 520

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 0004-6361

ER -