Correcting targeting of indirect fire

A method for dynamically correcting targeting of indirect fire comprising steps of:

• 1) acquiring locations of a gun to be fired for registration, of a registration target, and of a fire-for-effect (FFE) target;
• 2) acquiring values for a set of firing conditions, including gun and/or environmental conditions, for both registration and FFE firing, wherein the firing conditions include at least one of projectile mass, ballistic drag and lift coefficients, muzzle velocity, barrel wear, propellant temperature, elevation jump, azimuth jump, wind velocity, air pressure, air temperature;
• 3) estimating a unit effect of a firing condition error, for each of the firing conditions of the set, and determining correlation terms of an error covariance matrix W, wherein the correlation terms indicate correlations between errors both of registration firing conditions and of FFE firing conditions, and wherein at least one correlation term is less than one and greater than zero;
• 4) acquiring a registration miss vector as a result of registration firing, wherein elevation and azimuth parameters for registration firing are calculated by a ballistic simulation engine (BSE);
• 5) generating, from the correlation terms of the error covariance matrix W and the unit effects, 1) an effects covariance matrix Σ12 of effect correlations between errors of conditions during registration fire and errors of conditions during FFE, and 2) an effects covariance matrix Σ22 of correlations between errors of conditions during FFE, and responsively calculating a conditional correction matrix Σ12Σ22−1
• 6) multiplying the conditional correction matrix by the registration miss vector to calculate an FFE correction vector for FFE firing;
• 7) calculating FFE target adjusted coordinates by subtracting the FFE correction vector from the FFE target coordinates;
• 8) entering the FFE target adjusted coordinates to the BSE to generate elevation and azimuth firing parameters for FFE firing.