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within A. Egidi Remove this filter English Remove this filter Space Sciences (including Extraterrestrial Physics, Space Exploration and Astronautics) Remove this filter

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  1. No Access

    Article

    Processing Method Effects on Solar Diameter Measurements: Use of Data Gathered by the Solar Disk Sextant

    To determine the apparent diameter of the Sun, it is first necessary to measure the shape of the intensity profile of the solar limb with an imaging optical system (hereafter denoted as a solar-limb profile)....

    D. Djafer, G. Thuillier, S. Sofia, A. Egidi in Solar Physics (2008)

  2. No Access

    Article

    High-Precision Measurements of the Solar Diameter and Oblateness by the Solar Disk Sextant (SDS) Experiment

    We reduce and analyze, in a uniform way, all of the data obtained by the Solar Disk Sextant (SDS) experiment, concerning high-precision measurements of the solar radius and oblateness, in the bandwidth 590 {–}...

    A. Egidi, B. Caccin, S. Sofia, W. Heaps, W. Hoegy, L. Twigg in Solar Physics (2006)

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    Article

    The Prototype RISE-PSPT Instrument Operating in Rome

    The breadboard prototype of the PSPT (Precision Solar Photometric Telescope), built by NSO at Sacramento Peak, has been operating in Rome since February 1996 to test observing procedures and future network ope...

    I. Ermolli, M. Fofi, C. Bernacchia, F. Berrilli, B. Caccin, A. Egidi… in Solar Physics (1998)

  4. No Access

    Article

    A spherical harmonics filter for solar oscillations research

    A scheme, based on the expansion of solar oscillations into spherical harmonics, for the identification of sectorial modes of intermediate degree in the interval 3 < l < 20 is presented. In this range, the freque...

    P. Francia, E. Pietropaolo, U. Villante, A. Egidi in Solar Physics (1990)

  5. No Access

    Article

    Preliminary results from the solar wind experiment on the ISEE-2 satellite

    The EGD plasma experiment, launched on board of the ISEE-2 spacecraft, is briefly described. Preliminary results concerning three bow shock crossings occurred in November 1977 are discussed. Our attention is f...

    M. B. Bavassano-Cattaneo, C. Bonifazi, P. Cerulli-Irelli… in Space Science Reviews (1979)

  6. No Access

    Article

    Solar wind direction from HEOS 1 and Explorer 33 satellites

    A description is given of the analysis of the solar wind angular data from the satellite HEOS 1 and a comparison is made with the data obtained by Explorer 33, in the period of time from January 1967 to April ...

    A. Egidi, C. Signorini in Solar Physics (1974)