COVAL
COVAL, TBLNO1, TBLNO2, SV1, SV2, SV3, SV4, SV5, SV6, SV7
Defines PSD cospectral values.
TBLNO1First input PSD table number associated with this spectrum.
TBLNO2Second input PSD table number associated with this spectrum.
SV1,SV2,SV3, . . . ,SV7PSD cospectral values corresponding to the frequency points (PSDFRQ).
Notes
Defines PSD cospectral values to be associated with the previously defined frequency points. Two table references are required since values are off-diagonal terms. Unlike autospectra (PSDVAL), the cospectra can be positive or negative. The cospectral curve segment where there is a sign change is interpolated linearly (the rest of the curve segments use log-log interpolation). For better accuracy, choose as small a curve segment as possible wherever a sign change occurs.
Repeat COVAL command using the same table numbers for additional points. This command is valid for SPOPT,PSD only.
This command is also valid in PREP7.