User manual

Code: ENIGMA III User Manual
Edition: 1 Revision: 4
Date: 19/12/2008
Page: 20/97
2.3 Averaging
The SDP configuration parameter include the range sample and time sample parameter. Note, sometimes
“range sample” is also referred to “range averaging” and time sample is also referred to “time averaging”.
The figure below explains both parameters. The number of time samples is equivalent to the number of
pulses, which are used for averaging. The number of range samples is equivalent to the number of
consecutive range bins, which are averaged together in order to output 1 range bin for the physical
moments Z,V,W. In the figure below, range sample is 5, assume the range step is configured for 125
meter. First the signal processor averages the number of time samples (=pulses) for each range bin. Then,
the signal processor averages 5 range bins together. The resolution of the output data (physical moments
Z,V,W) is (5-1)x125 meter = 500 meter. When setting range sample to zero, no range averaging is applied
and the output resolution is equal to the configured range step.
2.3.1 Time averaging
Time averaging can be configured from 8 up to 256.
This parameter is equivalent to the number of
coherently integrated pulses for the AKF’s. In case of
dynamic angle syncing mode, the number of pulses
integrated, depends on the selected angle step, PRF
and antenna speed.
Parameter: SyncModeParam
2.3.2 Range averaging
Range averaging can be configured from 1 to 40. A
value of 1:q
means, that no range averaging is done. A value of 2
means, that 2 consecutive bins are averaged together
in order to form one output range bin. The range
averaging is applied on the AKF’s result.
Parameter: RangeSample
GAMIC Proprietary
Illustration 12: Time and range averaging