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Two new approaches to spatial interpolation with inherent sidelobe suppression for imaging riometers

Grill, Martin and Senior, Andrew and Honary, Farideh (2005) Two new approaches to spatial interpolation with inherent sidelobe suppression for imaging riometers. In: Proceedings of the 31st Annual European Meeting on Atmospheric Studies by Optical Methods and 1st International Riometer Workshop, 1900-01-01.

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    Abstract

    Absorption images as obtained by imaging riometers such as IRIS are usually created by interpolating between absorption values for individual beams. For IRIS, the locations of the beam centres serve as grid points for subsequent linear interpolation. Although generally producing good results, the fact that the actual shape of the imaging beams is not considered, potentially introduces errors and can lead to misinterpretations. In this paper, two alternative interpolation methods are introduced. Method A is based on measuring the similarity between simulated reception of individual point sources and actually received data. Method B uses a mathematical model of the sky brightness distribution parametrised by the received data. All interpolation methods are applied to power data, as opposed to absorption data, in order to avoid any errors that might be introduced by intermediate processing steps, especially QDC (quiet-day curve) generation. We apply all methods to synthetically generated test data as well as to three exemplary real datasets which are also compared to a calculated sky brightness distribution obtained from a skymap.

    Item Type: Conference or Workshop Item (Other)
    Journal or Publication Title: Proceedings of the 31st Annual European Meeting on Atmospheric Studies by Optical Methods and 1st International Riometer Workshop
    Uncontrolled Keywords: riometer DCS-publications-id ; inproc-381 ; DCS-publications-credits ; aries ; iono-fa ; iris ; DCS-publications-personnel-id ; 52 ; 51 ; 5
    Subjects: UNSPECIFIED
    Departments: Faculty of Science and Technology > School of Computing & Communications
    Faculty of Science and Technology > Physics
    Faculty of Science and Technology > Engineering
    ID Code: 6743
    Deposited By: ep_importer_dcs
    Deposited On: 16 Jun 2008 16:11
    Refereed?: No
    Published?: Published
    Last Modified: 09 Apr 2014 20:53
    Identification Number:
    URI: http://eprints.lancs.ac.uk/id/eprint/6743

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