circular error


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circular error

[′sər·kyə·lər ′er·ər]
(ordnance)
A bombing error measured by the radial distance of a point of bomb impact, or mean point of impact, from the center of the target, excluding gross errors.
With an airburst atomic bomb, the bombing error measured from the point on the ground immediately below the bomb burst to the desired ground zero.

circular error (CE)

circular error (CE)click for a larger image
An accuracy figure representing the stated percentage of probability that any point expressed as a function of two linear components (e.g., horizontal position) will be within the given figure. Circular error probability (CEP 50%), and CE (90%) are used commonly. A horizontal measurement on the ground, in feet or meters, defining a radius of a circle, within which an object of known coordinates should be found on an image. The CE value should have some measure of probability (P) associated with it. For example, a CE of 100 m and .9 P, means that 90% of the time the object will fall within a circle having a radius of 100 m. Circular error is normally used in armament delivery results.
References in periodicals archive ?
It utilizes an integrated GPS receiver with an uncorrected derived location range from 5-10 meters and 1-5 meter Circular Error Probability relative locations using standard DGPS corrections.
He put the accuracy of the Shahab-3 at a circular error of probability (CEP) of 2.
In military parlance, that's called circular error probability.
The Increment Ib weapon will provide long range (greater than or equal to 40km) with precise accuracy (less than or equal to 10m circular error probable) at less than one-half the cost of the current Excalibur variant.
The JDAM, with its GPS/inertial guidance package, already betters its circular error probable (CEP) of 13 meters.
The Shahab is estimated to have a circular error of probability (CEP) of 2.
5 minutes and achieved a circular error probable (CEP) of about 75 meters.
These impact accuracies are significantly better than the required 10-meter circular error probable, an objective requirement for the Block IA development.