520 CHAPTER 8. LABORATORY MEASUREMENT AND ANALYSIS
filtered to remove the primary short-wave frequencies. The second method
applied a square-law operation that treated the set-down as the primary
signal, whereas the two other long-wave signals were considered to be noise.
Both methods produced similar results.
filtered to remove the primary short-wave frequencies. The second method
applied a square-law operation that treated the set-down as the primary
signal, whereas the two other long-wave signals were considered to be noise.
Both methods produced similar results.