초록 ▼

An aircraft including an approach and landing system, including a navigation unit for providing navigation information, a weather radar unit for providing radar information, a processor which receives navigation information from the navigation unit and information from the weather radar unit, the pr

An aircraft including an approach and landing system, including a navigation unit for providing navigation information, a weather radar unit for providing radar information, a processor which receives navigation information from the navigation unit and information from the weather radar unit, the processor unit providing an output representing information concerning the aircraft in accordance with the provided navigation information and radar information, a memory for storing information representing a scene, the processor unit correlating the stored scene information with the output representing information concerning the aircraft to provide a mapped scene, a display unit for displaying the output of said processor and the mapped scene, and a steppable frequency oscillator for providing a signal which is stepped in frequency to the weather radar unit, thereby providing an increased range resolution.

대표청구항 ▼

[ What is claimed is:] [1.] A method of aircraft navigation using radar, comprising:storing information of cultural or natural features in an area of the ground along and to the sides of a flight path;using said radar during flight to obtain information of said features along and to the sides of sai

[ What is claimed is:] [1.] A method of aircraft navigation using radar, comprising:storing information of cultural or natural features in an area of the ground along and to the sides of a flight path;using said radar during flight to obtain information of said features along and to the sides of said flight path;comparing said stored information with said information obtained by radar to determine successive different match points representing different ground locations;determining the range and range rate of each of said match points;determining the aircraft's location and velocity based on repetitive range and range rate measurements of said match points; andsupplementing the accuracy of said aircraft location and velocity determination with information from at least one of an additional navigation unit.