United States Patent im
FitzGerald
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US005382958A
[ii] Patent Number: 5,382,958 [45] Date of Patent: Jan. 17,1995
[54] TIME TRANSFER POSITION LOCATION METHOD AND APPARATUS
[75] Inventor: Mark R. FitzGerald, Phoenix, Ariz.
[73] Assignee: Motorola, Inc., Schaumburg, HI.
[21] Appl. No.: 195,900
[22] Filed: Feb. 14,1994
Related U.S. Application Data
[63] Continuation of Ser. No. 991,936, Dec. 17, 1992, abandoned.
[51] Int. Cl.« G01S 1/08; G01S 5/02;
F41G 3/26
[52] U.S. CI 342/386; 342/357;
342/387; 434/16; 434/23 [58] Field of Search 342/386, 387, 357
[56] References Cited
U.S. PATENT DOCUMENTS
4,229,737 10/1980 Heldwein et al 342/46
4,445,118 4/1984 Taylor et al 343/357
4,591,730 5/1986 Pennoni 370/104
4,652,884 3/1987 Starker 342/357
4,682,953 7/1987 Doerfeletal 434/16
4,744,761 5/1988 Doerfel et al 434/16
4,812,991 3/1989 Hatch 364/458
4,866,450 9/1989 Chishohn 342/410
4,976,619 12/1990 Carlson 434/16
Primary Examiner—Gregory C. Issing
Attorney, Agent, or Firm—Frank J. Bogacz
[57] ABSTRACT
A time transfer position location method and arrangement. A mission control station initiates a number of relays placed throughout a simulated battlefield. Each of the relays then obtains position and time information from a Global Positioning System (GPS) satellite. Each relay repeatedly transmits position information (timing pulse) in a particular time slot over the playing field. In addition, fire mission information which includes type of munition deployed and its range and affects is also transmitted.
12 Claims, 3 Drawing Sheets
