Accession Number:

ADA090413

Title:

Improved Methods for Computing Drag Corrected Missile Impact Predictions in Real Time,

Descriptive Note:

Corporate Author:

NATIONAL RANGE OPERATIONS DIRECTORATE WHITE SANDS MISSILE RANGE NM

Personal Author(s):

• Kuzanek,Jerry F.

Report Date:

1980-06-01

Pagination or Media Count:

13.0

Abstract:

During missile flight tests at White Sands Missile Range WSMR, position data on the current status of the missile is transmitted 20 times per second from radar sites to a Univac 1108 computer. Consecutive pairs of such data are averaged 10 times per second and computations for plotting displays such as current position, range verses altitude, or impact prediction are based upon this averaged data. In the event that a missile veers from its planned trajectory, it will be necessary to determine thrust to prevent the missile from impacting in a populated area. For this reason, the Range Safety Officer RSO requires that for each computational cycle 10 per second an instantaneous impact prediction IIP of the missile be computed. This point is the intersection of the missile trajectory, should thrust be terminated, with the Clarke Spheroid of 1866 model of the Earth at an altitude of 4000 feet. Author

Descriptors:

• *GUIDED MISSILE TRAJECTORIES
• *IMPACT PREDICTION
• *RADAR RANGE COMPUTERS
• FLIGHT TESTING
• DIGITAL SYSTEMS
• REAL TIME
• TAYLORS SERIES
• POSITION FINDING
• AERODYNAMIC DRAG
• DIFFERENTIAL EQUATIONS
• PERTURBATIONS
• RUNGE KUTTA METHOD

Subject Categories:

• Guided Missile Dynamics, Configurations and Control Surfaces

Distribution Statement:

APPROVED FOR PUBLIC RELEASE