Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2014, Vol. 11, No. 3, pp. 249-258
Inclined two-dimensional phase difference ionosphere radiotomography
O.I. Baraboshkin
1,2 , S.V. Trusov
1 , A.A. Romanov
1 1 JSC "Russian Space Systems", Moscow, Russia
2 Moscow Institute of Physics and Technology (State University), Dolgoprudny, Russia
In the technique of two-dimensional radiotomography ionosphere monitoring along chains of stations using signals of low-orbit satellites, the sub-satellite track passes close to the stations, so the geometry of the experiment is flat. This condition severely limits the number of using spans. However the characteristics of the satellite signal and receivers are make it possible to receive signals at satellites with low elevation angles, so using side spans is technically possible. Signals of the satellites, passing back from the receiver chain, carry a lot of potentially valuable information about the state of the ionosphere, but currently they can’t be used or they are used incorrectly in the method of data processing. Problem under consideration in this paper is using side flights of satellites in a classical definition of ionosphere radiotomography. The influence of such geometry of the satellite pass on the initial phase difference data was compared with the flat case. The method of an inclined tomography taking into account the three-dimensionality of the task was proposed. The problems were considered: simulation of the solution of the inclined tomography; errors estimation, when solving similar to vertical flat case; the effectiveness of this approach.
Keywords: ionosphere, radiotomography
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