User manual

Code: ENIGMA III User Manual
Edition: 1 Revision: 4
Date: 19/12/2008
Page: 10/97
2 Algorithms
2.1 Thresholding
As the radar signal is contaminated with noise it is important to apply thresholding to the radar data.
Thresholding means that bins that pass one or the combination of several tests are discarded and flagged
as invalid. A combination of the following thresholds can be applied to all physical moments. The
combination of the flags is stored in a binary bit mask.
Parameter: thresholdFlagsTable
Remark: The value for the threshold flags can be calculated with the Tool
EnigmaThresholdFlagCalculator
Threshold combination Value
All Pass
FFFF
All Fail
0000
SQI
3333
SQI | NOISE
0033
SQI | CCOR
1111
SQI & CCOR
7777
SQI | NOISE | CCOR
0011
CCOR
5555
CCOR | NOISE
0055
NOISE
00FF
RHOHV
0F0F
RHOHV | SQI
0303
RHOHV & SQI
3F3F
RHOHV | NOISE
000F
Table 1: Useful threshold flag combinations
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