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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    author = "F. Villa and M. Sandri and P. Meinhold and Jussi Tuovinen and Jussi Varis and {et al.}",
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    year = "2010",
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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

    Y1 - 2010

    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

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    JO - Astronomy and Astrophysics

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    SN - 0004-6361

    ER -