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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
- ENIGMA III 1
- User Manual 1
- Table of Contents 2
- Illustration Index 7
- – Minor text revisions 8
- 1 Introduction 9
- 2 Algorithms 10
- 2.1.1 Noise Power threshold 11
- 2.1.2 CCOR threshold 11
- 2.1.3 SQI threshold 11
- 2.1.4 RHOHV Threshold 11
- 2.1.5 PhiDP SNR Threshold 11
- 2.1.6.2.2 IQ clutter filter 12
- 2.1.6.2.1 CCOR Threshold: 12
- 2.3 Averaging 20
- 2.3.1 Time averaging 20
- 2.3.2 Range averaging 20
- 2.4 Doppler clutter filters 21
- 2.4.1 Time domain filtering 21
- 2.4.2.1 DC Cancelation 23
- 2.4.2.3 Interpolation 23
- 2.4.2.1 Windowing 24
- 2.5 Pulse-pair processing 26
- 2.6 DFT processing 27
- 2.7 FFT processing 28
- 2.8 Range-Doppler Dilemma 29
- 2.9 Calibration 30
- 2.10 Dynamic Angle Syncing 31
- 2.11 Dual PRF Unfolding 32
- 3 Network 35
- 4 SDP settings 35
- 5 SDP interfaces 35
- 5.1 Command interface 36
- 5.1.1 Connection 37
- 6 Parametrization 38
- PhidpSNR: Phidp SNR threshold 39
- 6.1.1 KlystronGateDurationX 41
- 6.1.2 KlystronGateStartX 41
- 6.1.3 KlystronPulseDurationX 41
- 6.1.4 KlystronTaperingStartX 42
- 6.1.5 KlystronTaperingStopX 42
- 6.1.7 KlystronWindowTypeStopX 42
- 6.2 Trigger 43
- 6.2.1 TrigXEnable 43
- 6.2.2 TrigXDuration 43
- 6.2.3 TrigXStart 43
- 6.2.4 TrigXInvert 44
- 6.3 Sector blanking 44
- 6.3.1 SectorblankingTable 44
- 6.3.2 SectorblankingEnabled 45
- 6.4 Serial TAGS 45
- 6.4.1 PCIRecTagBaudRate 45
- 6.4.2 IFDTagBaudRate 46
- 6.4.3 TagConfiguration 46
- 6.4.4 SerialTagFormat 46
- Data packet Format 0 46
- Data packet Format 1 48
- 6.5 Extended Dynamic Range 49
- 6.5.1 ExtendedDynamicRange 49
- 6.5.2 PowerThreshold 49
- 6.5.3 PowerDiffH/PowerDiffV 50
- 6.5.4 PhaseDiffH/PhaseDiffV 50
- 6.6 IF signal processing 51
- 6.6.2 IFD matched filter 52
- FIRCoeff0 – FIRCoeff3 54
- 6.6.5 Burst sampling 55
- Code: ENIGMA III User Manual 56
- Edition: 1 Revision: 4 56
- Date: 19/12/2008 56
- Page: 56/97 56
- GAMIC Proprietary 56
- 6.7 Video signal processing 57
- 6.8 Autocorrelations 57
- 6.8.1 AcfMode 57
- 6.9 Range 57
- 6.9.1 RangeStep 58
- 6.10 Range Sampling 58
- 6.10.1 RangeSample 58
- 6.11 ClutterFilter 59
- 6.11.1 InterpolationMode 59
- 6.11.2 FFTWindow 59
- 6.11.3 ZeroFilter 60
- 6.11.4 FilterDelay 60
- 6.11.5 MaxFilterRange 60
- 6.12.1 IOffsetH 61
- 6.13 PRFTable 62
- 6.13.1 PrfLimits 62
- 6.14 PulseWidthIndex 62
- 6.15 NOISEThreshold 62
- 6.15.1 noisePowerH 63
- 6.15.2 noisePowerV 63
- 6.16 dbz0 63
- 6.17 RangeNorm 63
- 6.18 gasAttenuation 64
- 6.19 CCORThreshold 64
- 6.20 SQIThreshold 64
- 6.21.1 RainAttenuation 64
- 6.21.2 RainAttenuation_a 65
- 6.21.3 RainAttenuation_b 65
- 6.21.4 RainAttenuation_A 65
- 6.21.5 RainAttenuation_B 65
- 6.22 Threshold algorithms 66
- 7 Acquisition 67
- 7.2 Reflectivity 68
- 7.4 CCOR clutter correction 68
- 7.5 Radial Velocity 68
- 7.6 Acquisition parameter 69
- 7.6.1 RaySize 69
- 7.6.2 LongRaySize 69
- 7.6.3 SyncModeParam 69
- 7.7 AFCSettings 70
- 7.8 DualPolMode 70
- 7.9.1 ZdrOffset 71
- 7.9.2 LdrOffset 71
- 7.9.3 PhidpOffset 71
- 7.9.4 RHOHVThreshold 71
- 7.10 DataFormat 71
- 7.11 Ray format 72
- 7.11.1 Ray header format 74
- 7.11.1.1 SDPFlags 75
- 7.11.1.2 SDPStatus 75
- 7.11.2 Angle Data 76
- 7.11.3 Moments 76
- 7.11.4 Mag,I,Q 8 bit 76
- 7.11.5 I,Q 16 bit 77
- 7.11.6 SQI/CCOR 8 bit 77
- 7.11.7 Power spectrum 78
- 7.11.9 Moments 16 bit 78
- 7.11.10 Full Moments 16 bit 79
- - Offset of horizontal I 82
- - Offset of vertical I 82
- 8.2.2 getantennaspeed 83
- 8.2.3 gettemperature 83
- 8.2.4 getpower 83
- 8.2.5 getconverter 84
- 8.2.6 getacqperformance 84
- 8.2.7 getafcstatus 84
- 8.3 getversion 85
- 8.4 sampleburst 85
- 8.5 setafcmode 85
- 8.6 getifsampling 85
- 8.7 settxdtrigger 86
- 8.8 geterrorconditions 86
- 8.9 build 86
- 8.10 load 86
- 8.11 save 87
- 8.12 quit 87
- 9 Specifications 88
- Page: 89/97 89
- 9.2.7 Input TAGS serial RS422 90
- 9.3.2 ENIGMA III Host 92
- 10.1 Enigma III host update 95
- 10.2 PCI-Receiver card update 95
- 10.3 Antenna alignment 96
- 10.4 Setting prf limits 96
- 10.5 IQ Recording 97
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