User manual

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Code: ENIGMA III User Manual

Edition: 1 Revision: 4

Date: 19/12/2008

Page: 7/97

Illustration Index

Illustration 1: Spectrum showing clutter and weather..................................................................................14

Illustration 2: Time domain filtered spectrum..............................................................................................14

Illustration 3: Frequency domain filtered spectrum......................................................................................14

Illustration 4: PPI-V pulse Pair Processing...................................................................................................15

Illustration 5: PPI-Z Pulse Pair Processing...................................................................................................15

Illustration 6: PPI-V DFT Processing...........................................................................................................15

Illustration 7: PPI-Z DFT Processing............................................................................................................15

Illustration 8: PPI showing clutter power measured by frequency domain filtering...................................16

Illustration 9: PPI showing clutter power measured by time domain filtering............................................16

Illustration 10: SQI A-Scope.........................................................................................................................17

Illustration 11: Speckle remover...................................................................................................................19

Illustration 12: Time and range averaging....................................................................................................20

Illustration 13: Typical spectrum showing weather and clutter targets........................................................21

Illustration 14: 40 dB IIR clutter filter..........................................................................................................22

Illustration 15: 50 dB IIR clutter filter..........................................................................................................22

Illustration 16: IIR time domain clutter filter...............................................................................................22

Illustration 17: DC cancelation.....................................................................................................................23

Illustration 18: Spectrum interpolation.........................................................................................................23

Illustration 19: DFT processing....................................................................................................................27

Illustration 20: FFT processing.....................................................................................................................28

Illustration 21: Range doppler dilemma.......................................................................................................29

Illustration 22: Radar equation......................................................................................................................30

Illustration 23: Definition of radar losses.....................................................................................................31

Illustration 24: Dynamic angle syncing........................................................................................................31

Illustration 25: Integrated pulses versus PRF and scanrate..........................................................................32

Illustration 26: Dual PRF unfolding.............................................................................................................33

Illustration 27: ENIGMA III 19" enclosure..................................................................................................88

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