Trevor Thompson, Ashley Crooks, Justin Benavidez

34.55164, -101.1764834.49840, -101.64545

34.55593, -101.73444

• 1700s to 1900s-Sailors and travelers use compass’ and sextant’s to determine location

• 1938-Rabi develops the Atomic Clock

• 1964-First Transit satellite was launched

• 1964-Polaris submersible uses Transit to determine location

• 1967-First Transit unit produced for the public

• 1989-Government launches first of 24 satellites for military purposes

• June 26, 1993-Government releases GPS information and commercial production began

Prs + T + Es = (x-xs)2 + (y-ys)2 + (z-zs)2•x, y, z are the positions we are trying to locate

•T = the time error at the receiver •xs, ys, zs are the satellite positions (calculated •Es = a sum of all the modeling errors considered by the GPS •Prs is the approximate (pseudo-range) distance from the satellite to the ground•(include tropospheric and ionospheric errors, clock errors from the satellite and any other error the GPS receivers thinks is significant enough to model)

We begin by measuring the distance to one satellite:

We measure the distance from the 2nd satellite to be 12,000 miles:

We begin by measuring the distance to the third satellite to be 13,000:

•Map out farms and important features

•Measure distance, altitudes, and area

•Map out a trip