@article{10902/923, year = {2010}, month = {9}, url = {http://hdl.handle.net/10902/923}, 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.}, publisher = {EDP Sciences}, publisher = {Astronomy and Astrophysics, 2010, 520, A6.}, title = {Planck pre-launch status: Calibration of the Low Frequency Instrument flight model radiometers}, author = {Villa, Fabrizio and Terenzi, Luca and Sandri, Maura and Meinhold, Peter R. and Poutanen, Torsti and Battaglia, Paola and Franceschet, Cristian and Hughes, Nicholas J. and Laaninen, Mikko and Lapolla, P. M. and Bersanelli, Marco and Butler, Reginald Christopher and Cuttaia, Francesco and D'Arcangelo, Ocleto and Frailis, Marco and Franceschi, Enrico and Galeotta, Samuele and Gregorio, Anna and Leonardi, Rodrigo and Lowe, Stuart and Mandolesi, Nazzareno and Maris, Michele and Mendes, Luiz T. S. and Mennella, Anniello and Morgante, Gianluca and Stringhetti, Luca and Tomasi, Maurizio and Valenziano, Luca and Zacchei, Andrea and Zonca, Annalisa and Aja Abelán, Beatriz and Artal Latorre, Eduardo and Balasini, M. and Bernardino, T. and Blackhurst, Edward J. and Boschini, Luca and Cappellini, Benedetta and Cavaliere, Francesca and Colin, Ángel and Colombo, Fabrizio and Davis, Richard J. and Fuente Rodríguez, Luisa María de la and Edgeley, J. and Gaier, Todd C. and Galtress, A. and Hoyland, Roger J. and Jukkala, Petri and Kettle, Danielle and Kilpia, V-H Hermanni and Lawrence, Charles R. and Lawson, David J. and Leahy, J. Patrick and Leutenegger, Paolo H. and Levin, Steven M. and Maino, Davide and Malaspina, Marco and Mediavilla Sánchez, Ángel and Miccolis, Maurizio and Pagan, Luca and Pascual Gutiérrez, Juan Pablo and Pasian, Fabio and Pecora, Massimiliano and Pospieszalski, Marian W. and Roddis, Neil and Salmón, María J. and Seiffert, Michael D. and Silvestri, R. and Simonetto, Alessandro and Sjöman, Pekka and Sozzi, Carlo and Tuovinen, Jussi and Varis, Jussi and Wilkinson, Althea and Winder, Frank}, }