On Pfister's theorem and its generalization |
| |
| Institution: | 1. Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Tongji University, Shanghai 200072, China;2. Shanghai Engineering Research Center of Tooth Restoration and Regeneration, Shanghai 200072, China;3. Center for quantitative sciences, Vanderbilt University Medical Center, Nashville, TN, USA;4. Department of Prosthodontics, School and Hospital of Stomatology, Tongji University, Shanghai 200072, China |
| |
| Abstract: | The relation between angle of arrival and Doppler shift that has been called Pfister's theorem is shown to be a special case of a result that applies to ionospherically transmitted signals between fixed ground sites, whenever the ionosphere moves without change of shape. This general result does not require the existence of an effective mirror reflector or any special symmetry of the ionosphere, but depends only on the validity of ray theory. The formula obtained by Pfister (1971) J. atmos. terr. Phys.33, 999] is shown to apply, provided the ray returning from the ionosphere follows the same path as the incident ray. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
