Level 1 on-ground telemetry handling in Planck-LFI

doi:10.1088/1748-0221/4/12/T12019

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Journal of Instrumentation Volume 4 December 2009 Create an alert RSS this journal

A Zacchei et al 2009 JINST 4 T12019 doi:10.1088/1748-0221/4/12/T12019

Level 1 on-ground telemetry handling in Planck-LFI

OPEN ACCESS The Planck Low Frequency Instrument

A Zacchei^a, M Frailis^a, M Maris^a, N Morisset^b, R Rohlfs^b, M Meharga^b, P Binko^b, M Türler^b, S Galeotta^a, F Gasparo^a, E Franceschi^c, R C Butler^c, F Cuttaia^c, O D'Arcangelo^j, S Fogliani^a, A Gregorio^f, R Leonardi^h, S R Lowe^g, D Maino^e, G Maggio^a, M Malaspina^c, N Mandolesi^c, P Manzato^a, P Meinhold^h, L Mendesⁱ, A Mennella^e, G Morgante^c, F Pasian^a, F Perrotta^d, M Sandri^c, L Stringhetti^c, L Terenzi^c, M Tomasi^e and A Zonca^e

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zacchei@oats.inaf.it

^a Osservatorio Astronomico di Trieste, INAF, Via Tiepolo 11, 34143 Trieste, Italy
^b ISDC, University of Geneva, ch. d'Ecogia 16, 1290 Versoix, Switzerland
^c IASF - Sezione di Bologna, INAF, Via Gobetti, 101, 40129 Bologna, Italy
^d SISSA - ISAS, via Beirut 2-4, 34151 Trieste, Italy
^e Dipartimento di Fisica, Università degli Studi di Milano, Via Celoria 16, 20133 Milano, Italy
^f Dipartimento di Fisica, Università degli Studi di Trieste, Via Valerio 2, 34127 Trieste, Italy
^g Jodrell Bank Centre for Astrophysics, The University of Manchester, Manchester, M60 1QD, UK
^h Department of Physics, University of California, Santa Barbara, CA 93106-9530, USA
ⁱ ESA - ESAC, P.O. box 78 28691 Villanueva de la Cañada Madrid, Spain
^j Istituto di Fisica del Plasma, CNR, Via Cozzi 53, Milano, Italy

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Abstract References Cited By

Part of The Planck Low Frequency Instrument

The Planck Low Frequency Instrument (LFI) will observe the Cosmic Microwave Background (CMB) by covering the frequency range 30-70 GHz in three bands. The primary instrument data source are the temperature samples acquired by the 22 radiometers mounted on the Planck focal plane. Such samples represent the scientific data of LFI. In addition, the LFI instrument generates the so called housekeeping data by sampling regularly the on-board sensors and registers. The housekeeping data provides information on the overall health status of the instrument and on the scientific data quality. The scientific and housekeeping data are collected on-board into telemetry packets compliant with the ESA Packet Telemetry standards. They represent the primary input to the first processing level of the LFI Data Processing Centre. In this work we show the software systems which build the LFI Level 1. A real-time assessment system, based on the ESA SCOS 2000 generic mission control system, has the main purpose of monitoring the housekeeping parameters of LFI and detect possible anomalies. A telemetry handler system processes the housekeeping and scientific telemetry of LFI, generating timelines for each acquisition chain and each housekeeping parameter. Such timelines represent the main input to the subsequent processing levels of the LFI DPC. A telemetry quick-look system allows the real-time visualization of the LFI scientific and housekeeping data, by also calculating quick statistical functions and fast Fourier transforms. The LFI Level 1 has been designed to support all the mission phases, from the instrument ground tests and calibration to the flight operations, and developed according to the ESA engineering standards.

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