Global positioning systems (GPS) can "know" their location by

A) measuring the time required for radio signals from four or more satellites to reach the receiver.
B) relating changes in detected radiation to changes in the position of the Sun.
C) continually measuring changes in angle to a stationary reference point, such as a streetlight, in the area of the receiver.
D) relating slight changes in magnetism and gravity to changes in the distance and direction of movement from the point at which the location of the receiver was last calibrated.


A) measuring the time required for radio signals from four or more satellites to reach the receiver.

Environmental & Atmospheric Sciences

You might also like to view...

The capacity of air to hold water vapor is temperature dependent

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

What will be the role of government in affecting the transition from nonrenewable, polluting energy sources to renewable, environmentally-friendly energy sources?

What will be an ideal response?

Environmental & Atmospheric Sciences

The formation of freezing rain involves

A) snow passing through a fairly thick layer of above-freezing air before passing through a thin layer of subfreezing temperatures near the surface. B) air temperatures decreasing uniformly with height, producing the cold conditions necessary for freezing rain formation. C) air temperatures increasing uniformly with height, producing the cold conditions necessary for freezing rain formation. D) snow passing through a fairly thin layer of above-freezing air before passing through a thick layer of subfreezing temperatures near the surface.

Environmental & Atmospheric Sciences

Detail the evolution of industry in Europe.

What will be an ideal response?

Environmental & Atmospheric Sciences