fswdem
NAME
fswdem - demodulate frequency switched data
SYNOPSIS
fswdem [ -type method ]
DESCRIPTION
This command demodulate frequency switched profile.
Difference between on and off velocities are automatically caliculated
from the scn header.
FILTER TYPE
.scn | fswdem | .scn
OPTIONS
- -type fold | both | bothward | both_sum | foreward | + | backward | -
- A demodulation method can be selected.
- "fold" is the classical method
- "both", "bothward", or "both_sum" is based on Fourier demodulation methord.
Demodulation is performed in both direction
and the resultant profile is an average.
- "foreward" or "+" is base on Fourier demodulation methord.
Demodulation is performed toword only channel increasing direction.
- "backward" or "-" is base on Fourier demodulation methord.
Demodulation is performed toword only channel decreasing direction.
DEFAULTS
- -type both -prm fswdem.prm
BUGS
- "fold" method gives unreal negative images at both sides of the
real emission apart with switching velocity width on the resultant profile.
- "both" method gives unreal spikes with switching velocity interval
on the resultant profile.
- "forward" method gives unreal spikes with switching velocity interval
on the resultant profile.
- "backward" method gives unreal spikes with switching velocity interval
on the resultant profile.
HISTORY
ver.3.00
1998/7/25 T.Handa
MANUAL VERSION
1999/12/23 T.Handa