Accession Number:

ADA343172

Title:

A Revisit of the Field Artillery's Time-Space Wind Variability Equation

Descriptive Note:

Final rept.

Corporate Author:

ARMY RESEARCH LAB WHITE SANDS MISSILE RANGE NM BATTLEFIELD ENVIRONMENT DIRECTORATE

Personal Author(s):

• Blanco, Abel J.
• Haines, Patrick A.

Report Date:

1998-04-01

Pagination or Media Count:

34.0

Abstract:

The U.S. Army has derived artillery accuracy error budgets based on a time space ballistic wind variance formula. The wind algorithm uses a midlatitude wind profile to derive the expected ballistic wind component variance. This time variability equation is reevaluated using 190 hourly upper air profiler soundings collected over Platteville, CO, representing 8 days of diverse weather conditions. Comparisons between the computed ballistic wind time variability and the equation estimated variability reveal the formula to be an unbiased estimator with 1 kn precise agreement at a staleness of 1 h. The equation accuracy ranges from 1.5 to 3.0 ballistic kn depending on a time staleness of 2 to 4 h, ballistic line, and season.

Descriptors:

• *METEOROLOGICAL DATA
• *WIND VELOCITY
• *BALLISTICS
• ALGORITHMS
• ANALYSIS OF VARIANCE
• LEAST SQUARES METHOD
• WIND DIRECTION
• PROJECTILE TRAJECTORIES
• ARTILLERY FIRE

Subject Categories:

• Ballistics
• Meteorology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE