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    Chapter and Conference Paper

    Spatial Distribution of Constituents in the Coma of Comet Halley, an Observing Programme at the ESO 1-m Telescope

    When a comet visits the inner solar system the sun’s radiation sublimates part of the nucleus1 matter. The liberated gases drag some dust particles with them and form the coma of the comet. It has an approxima...

    K. Jockers, E. H. Geyer… in Physical Processes in Comets, Stars and Active Galaxies (1987)

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    Chapter and Conference Paper

    Observations of ions in comet P/Halley with a focal reducer

    Comet Halley was observed with the ESO 1 m telescope and a dedicated focal reducer instrumentation. Narrowband images of the comet in the light of the \( CO_2^ + \) ion at 367.4 nm wer...

    K. Jockers, E. H. Geyer, H. Rosenbauer, A. Hänel in Exploration of Halley’s Comet (1988)

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    Chapter and Conference Paper

    Multi-Purpose PV Plant in Lisbon, Portugal

    A 15.6 kWp PV plant with a variety of different consumer types and a novel load management scheme is described. It is designed to be able to operate in several stand-alone configurations and grid connected mode. ...

    L. Guimarães, E. Fortunato, R. Martins… in Tenth E.C. Photovoltaic Solar Energy Confe… (1991)

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    Chapter and Conference Paper

    Conceptual Development of Low-Cost Array Structure

    Array structures as mechanical part of PV arrays still consume a high percentage of total plant costs. The work performed allows for systematic minimization of array structure costs and is directed towards sta...

    A. Hänel in Tenth E.C. Photovoltaic Solar Energy Conference (1991)