Aeronautics and astronautics – Missile stabilization or trajectory control – Automatic guidance
Patent
1974-04-22
1976-11-09
Pendegrass, Verlin R.
Aeronautics and astronautics
Missile stabilization or trajectory control
Automatic guidance
244 321, F42B 1502
Patent
active
039906574
ABSTRACT:
Errors in the trajectories of balistic missiles result from a number of ces such as the velocity uncertainty of the missile during its powered flight. Prediction of these errors provides the missile circular error probability (CEP) usually in the form of a ballistic position error ellipse that is derived for each trajectory. This ellipse can be used to significantly improve performance by reducing the error probability. At a particular time (T.sub.1) during the flight a radar altimeter determines the actual altitude of the missile and computation of the altitude error is made by subtracting the actual altitude from the nominal altitude at T.sub.1 provided by the predetermined ellipse. Range error is computed from the relationship .DELTA. h over tangent .theta. where .theta. is the angle of the ellipse semi-major axis with respect to the vertical. A missile control system then directs a maneuver based upon the range error to correct the error by returning the missile to its nominal trajectory.
REFERENCES:
patent: 2932467 (1960-04-01), Scorgie
patent: 2979284 (1961-04-01), Genden et al.
patent: 3184182 (1965-05-01), May et al.
patent: 3249324 (1966-05-01), Coffman
patent: 3497161 (1970-02-01), Kissinger et al.
patent: 3758052 (1973-09-01), McAlexander et al.
Critchlow Paul N.
Pendegrass Verlin R.
Sciascia Richard S.
The United States of America as represented by the Secretary of
LandOfFree
Method and apparatus for reducing ballistic missile range errors does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for reducing ballistic missile range errors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for reducing ballistic missile range errors will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1721431