GPS radio holography as a tool for remote sensing of the atmosphere, mesosphere, and terrestrial surface from space |
| |
| Authors: | Alexander Pavelyev Yuei-An Liou Christoph Reigber Jens Wickert Kiyoshi Igarashi Klemens Hocke Cheng-Yung Huang |
| |
| Institution: | (1) Center for Space and Remote Sensing Research, National Central University, Chung-Li 320, Taiwan,;(2) Institute of Radio Engineering and Electronics of Russian Academy of Sciences (IRE RAS), Fryazino, Vvedenskogo Sq. 1, 141120 Moscow, Russia,;(3) GeoForschungsZentrum Potsdam, Telegrafenberg, 14473 Potsdam, Germany,;(4) Communication Research Laboratory, Independent Administrative Institute, 4-2-1 Nukui-Kita Machi, Koganei-shi, Tokyo 184-8795, Japan, |
| |
| Abstract: | GPS radio occultation (RO) signals are highly coherent and precise, and thus sufficient for holographic investigation of
the atmosphere, ionosphere, and the Earth's surface from space. In principle, three-dimensional radio-holographic remote sensing
is possible by using new radio holographic equations to retrieve the radio field within the atmosphere from a radio field
known at some interface outside the atmosphere. A simplified two-dimensional form of the radio-holographic equations which
are developed under an assumption of local spherical symmetry can be used to obtain two-dimensional radio images of the atmosphere
and terrestrial surface. To achieve this, radio holograms recorded by a GPS receiver onboard a low earth orbit (LEO) satellite
at two GPS frequencies can be used and focused synthetic aperture principle applied. Analysis of GPS/MET RO data is presented
to show the effectiveness of a radio-holographic approach. It is shown that the amplitude of GPS radio signals (in addition
to phase data) can be used to obtain detailed altitude profiles of the vertical gradient of refractivity in the atmosphere
and electron density in the mesosphere. The results demonstrate the applicability of GPS radio holography for a detailed global
study of the natural processes in the atmosphere and mesosphere.
Electronic Publication |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
