Current status of LLL Four-D atmospheric propagation code effort

Technical Report · Tue Mar 16 04:00:00 EST 1976

OSTI ID:7351105

Fleck, Jr, J A; Morris, J R

The deployment of high-energy lasers against moving targets is almost always noncoplanar. This noncoplanarity creates a vertical wind component in the transverse plane that causes the effective wind vector to rotate continuously. All propagation codes that have been developed in the past have been based on the assumption of a purely horizontal wind. The scenario capability of the Four-D code has now been generalized from the previous coplanar version, which assumed a moving laser platform, a target on a collision course with the platform, and an arbitrarily oriented coplanar wind. Currently the laser can be displaced to any height above the platform, and the scenario plane can be aribitrarily oriented with respect to the horizon. The scenario routine returns to the hydrodynamics routine of the code a transverse wind velocity vector of varying magnitude and orientation. The hydrodynamics routine of the Four-D code is now capable of treating both CW and multipulse steady state sources with winds of arbitrary magnitude and direction relative to the x-axis. A complete time-dependent capability for arbitrary wind directions will be completed some time in the near future.

• Research Organization: California Univ., Livermore (USA). Lawrence Livermore Lab.
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7351105
• Report Number(s): UCID-16827-2
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
COMPUTER CODES
ELECTROMAGNETIC RADIATION
F CODES
LASER RADIATION
RADIATIONS
USES
WAVE PROPAGATION
WIND