User manual

Code: ENIGMA III User Manual
Edition: 1 Revision: 4
Date: 19/12/2008
Page: 57/97
6.7 Video signal processing
Time series consist of an array of complex numbers
s
n
=I
n
+jQ
n
I and Q signals are sampled with configurable resolution. Standard is multiple of 25m but can be changed
to any integer step in meter on user request.
Processing stages:
1) time averaging, clutter filtering, computation of autocorrelations
2) range sampling
3) weather moments computation and thresholding
4) distribution of weather moments
6.8 Autocorrelations.
SDP has three methods for calculation of filtered data and autocorrelations: Pulse-Pair (PPP), DFT and
FFT processing.
6.8.1 AcfMode
This value specifies the used algorithm for the auto correlations.
Possible values:
0 – Pulse-pair
1 – DFT
2 – FFT
Type: integer
Default: 0
6.9 Range
Specify the range as floating point value in km. Maximum range is 400km. It must be an interger
multiple of the configured RangeStep.
Type: float
Default: 100.0
Unit: km
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