September 15, 1999 Page 5 of 13. 3 Sampling of band-pass signals. 3.1 Introduction. The Nyquist sampling theorem states that to get a unique representation of the frequency. content of a signal, the signal must be sampled at a rate twice the frequency of the highest. frequency component of the signal.
A quarter section, often shortened to quarter, is an area of one-fourth of a square mile, or 160 acres (0.65 km2). It was a common size of a tract under Homestead Acts in the United States and the Dominion Land Survey in Canada.
Each acre is 43,560 square f â¦ eet   Therefore, one quarter of a section is 640/4 x 43,560 = 6,969,600 square feet.   Alternatively, you can see that a square mile cut into quarters would be 4 half-mile by half-mile squares. A mile is 5,280 feet, so each square would be (1/2 x 5,280)2 = 6,969,600 square feet.