08172139 is referenced by 29 patents and cites 144 patents.

A portable system for facilitating inclined shooting of projectile weapons comprises a ranging system, an inclinometer and a processor. The ranging system measures a line-of sight range distance from a vantage point to a target that is elevated or depressed relative to the vantage point, and the inclinometer measures an inclination angle of a line of sight between the vantage point and the target. Based on information from the rangefinder and inclinometer, the processor determines a predicted altitude-compensated inclined shooting (ACIS) trajectory at the line-of sight range distance for a preselected projectile. The ACIS trajectory is based on a bullet path height correction between a bullet path height at a first altitude and a bullet path height at a second altitude, a range distance of the target from the vantage point, and selected meteorological atmospheric information.

Title
Ballistic ranging methods and systems for inclined shooting
Application Number
12/952121
Publication Number
8172139 (B1)
Application Date
November 22, 2010
Publication Date
May 8, 2012
Inventor
Ted C Almgren
Darby
MT, US
William True McDonald
Darby
MT, US
Agent
Joseph P Curtin L L C
Assignee
Bitterroot Advance Ballistics Research
MT, US
IPC
G06G 7/80
View Original Source