Planck Early Results. V. The Low Frequency Instrument data processing
Abstract
We describe the processing of data from the Low Frequency Instrument (LFI) used in production of the Planck Early Release Compact Source Catalogue (ERCSC). In particular, we discuss the steps involved in reducing the data from telemetry packets to cleaned, calibrated, time-ordered data (TOD) and frequency maps. Data are continuously calibrated using the modulation of the temperature of the cosmic microwave background radiation induced by the motion of the spacecraft. Noise properties are estimated from TOD from which the sky signal has been removed using a generalized least square map-making algorithm. Measured 1/f noise knee-frequencies range from 100mHz at 30GHz to a few tens of mHz at 70GHz. A destriping code (Madam) is employed to combine radiometric data and pointing information into sky maps, minimizing the variance of correlated noise. Noise covariance matrices required to compute statistical uncertainties on LFI and Planck products are also produced. Main beams are estimated down to the approx -10dB level using Jupiter transits, which are also used for geometrical calibration of the focal plane.
Keywords
Cite
@article{arxiv.1101.2040,
title = {Planck Early Results. V. The Low Frequency Instrument data processing},
author = {A. Zacchei and D. Maino and C. Baccigalupi and M. Bersanelli and A. Bonaldi and L. Bonavera and C. Burigana and R. C. Butler and F. Cuttaia and G. de Zotti and J. Dick and M. Frailis and S. Galeotta and J. González-Nuevo and K. M. Górski and A. Gregorio and E. Keihänen and R. Keskitalo and J. Knoche and H. Kurki-Suonio and C. R. Lawrence and S. Leach and J. P. Leahy and M. López-Caniego and N. Mandolesi and M. Maris and F. Matthai and P. R. Meinhold and A. Mennella and G. Morgante and N. Morisset and P. Natoli and F. Pasian and F. Perrotta and G. Polenta and T. Poutanen and M. Reinecke and S. Ricciardi and R. Rohlfs and M. Sandri and A. -S. Suur-Uski and J. A. Tauber and D. Tavagnacco and L. Terenzi and M. Tomasi and J. Valiviita and F. Villa and A. Zonca and A. J. Banday and R. B. Barreiro and J. G. Bartlett and N. Bartolo and L. Bedini and K. Bennett and P. Binko and J. Borrill and F. R. Bouchet and M. Bremer and P. Cabella and B. Cappellini and X. Chen and L. Colombo and M. Cruz and A. Curto and L. Danese and R. D. Davies and R. J. Davis and G. de Gasperis and A. de Rosa and G. de Troia and C. Dickinson and J. M. Diego and S. Donzelli and U. Dörl and G. Efstathiou and T. A. Enßlin and H. K. Eriksen and M. C. Falvella and F. Finelli and E. Franceschi and T. C. Gaier and F. Gasparo and R. T. Génova-Santos and G. Giardino and F. Gómez and A. Gruppuso and F. K. Hansen and R. Hell and D. Herranz and W. Hovest and M. Huynh and J. Jewell and M. Juvela and T. S. Kisner and L. Knox and A. Lähteenmäki and J. -M. Lamarre and R. Leonardi and J. León-Tavares and P. B. Lilje and P. M. Lubin and G. Maggio and D. Marinucci and E. Martínez-González and M. Massardi and S. Matarrese and M. T. Meharga and A. Melchiorri and M. Migliaccio and S. Mitra and A. Moss and H. U. Nørgaard-Nielsen and L. Pagano and R. Paladini and D. Paoletti and B. Partridge and D. Pearson and V. Pettorino and D. Pietrobon and G. Prézeau and P. Procopio and J. -L. Puget and C. Quercellini and J. P. Rachen and R. Rebolo and G. Robbers and G. Rocha and J. A. Rubiño-Martín and E. Salerno and M. Savelainen and D. Scott and M. D. Seiffert and J. I. Silk and G. F. Smoot and J. Sternberg and F. Stivoli and R. Stompor and G. Tofani and L. Toffolatti and J. Tuovinen and M. Türler and G. Umana and P. Vielva and N. Vittorio and C. Vuerli and L. A. Wade and R. Watson and S. D. M. White and A. Wilkinson},
journal= {arXiv preprint arXiv:1101.2040},
year = {2016}
}
Comments
A&A Volume 536, December 2011 Planck early results