О применении конечно-разностной аппроксимации Паде псевдодифференциального параболического уравнения в задаче тропосферного распространения радиоволн
Авторы
М. С. Лытаев
Ключевые слова:
уравнение Гельмгольца
параболическое уравнение
распространение радиоволн
аппроксимация Паде
Аннотация
Рассматривается задача численного моделирования распространения электромагнитных волн в неоднородной тропосфере на основе широкоугольных обобщений метода параболического уравнения. Используется конечно-разностная аппроксимация Паде оператора распространения. Существенно, что в предлагаемом подходе указанная аппроксимация осуществляется одновременно по продольной и поперечной координатам. При этом допускается моделирование произвольного коэффициента преломления тропосферы. Метод не накладывает ограничений на максимальный угол распространения. Для различных условий распространения радиоволн проведено сравнение с методом расщепления Фурье и методом геометрической теории дифракции. Показаны преимущества предлагаемого подхода.
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