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Title:
 
Herschel and Planck PhotoVoltaic Assembly In-Flight Behaviour
 
Author(s):
 
E. Ciancetta, G. Gervasio, P. Couzin, E. Fern├índez Lisbona, P. Zanella
 
Keywords:
 
Gallium Arsenide Based Cells, PV Array, Space
 
Topic:
 
MATERIAL STUDIES, NEW CONCEPTS, ULTRA-HIGH EFFICIENCY AND SPACE TECHNOLOGY
Subtopic: Solar Cells, Modules and PV Systems for Space Applications
Event: 28th European Photovoltaic Solar Energy Conference and Exhibition
Session: 1BO.12.6
 
Pages:
 
82 - 87
ISBN: 3-936338-33-7
Paper DOI: 10.4229/28thEUPVSEC2013-1BO.12.6
 
Price:
 
 
0,00 EUR
 
Document(s): paper
 

Abstract/Summary:


Herschel and Planck are space observatories managed by the European Space Agency. The two satellites were launched on May 14, 2009 by a single Ariane-5 launcher and operated in two different Lissajous orbits around the second Lagrangian point (L2), 1.5 million kilometres away from the Earth. Herschel completed its scientific operation in April 2013 and it was passivated on 17 June 2013; the passivation of Planck is planned on 23 October 2013. Herschel spacecraft is 3-axis-stabilized, whereas Planck is a slow spinner. However, the two satellites have been developed as a single project and the service modules share a large number of characteristics, including the power system. This paper will first outline the power system design providing a description of the major design drivers and then will provide an interesting synthesis of the PhotoVoltaic Assembly (PVA) in-flight monitoring, covering performance at launch and during major manoeuvres, degradation with life compared to the expected one. Herschel and Planck are the first ESA astronomical missions operating at L2; analysis of the Photo Voltaic Assembly performance is interesting in view of the next missions on that orbit like GAIA, James Webb Space Telescope and Euclid.