SIGMET The RVP8 TM Digital Tx/Rx and Signal Processor for Weather Radar Elena Saltikoff

The Famous RVP7 Most widely sold Doppler weather radar processor (over 200 units) All the algorithms of RVP7 are ported to the new RVP8 Architecture. RVP8: new capabilities, new hardware solutions and a digital transmitter.

Digital Transmitter and Receiver (digitally synthesized IF waveform) More control of the signal Real time signal correction for I/O samples: - Amplitude correction - Phase stability of magnetrons to nearly as good as klystrons (better clutter cancellation) Linear dynamic range 98 dB for a 1  s pulse Linearization (saturation 3-5 dB later due to oversampling)

For Klystron Radars also Pulse Compression (less power, less interference) Frequency agility (dual frequency, more range resolution) Phase agility (2 nd trip cancellation)

Long Expected Life Cycle Easy to maintain, upgrade and expand Open hardware: standard PCI bus technology Linux, Pentium, Standard I/O SoftPlane TM to control critical I/O API (Application Program Interface) for own innovations

Nexrad gets RVP8, too Prototype RVP8 July sites during sites more 2004 – 2005 RVP8, RCP8 and IRIS/Radar

Examples of newish algorithms Adaptive FFT Doppler filter Random Phase “Doppler Doubler” (for Doppler dilemma) SQI threshold for V and Z 2D speckle filter (remove and fill)

Adaptive FFT Doppler filter: Cancellation limits move dynamically within set limits

Random Phase “ Doppler Doubler ” Study the phase of two pulses (for magnetron random, for klystron controlled) Use SQI threshold for each Recover the 2 nd trip echo Allows use of higher PRF

2D Speckle filter Study 8 neighbors in range and azimuth Delete or fill ?

Want to know more ? 23-page technical description available 3-page paper at ERAD (O’Hora et al.) I’ll add some slides for those who want technical details. That’s Hannu, really, cheers ! I’ll add some slides for those who want technical details. That’s Hannu, really, cheers !

RVP8 Example: Basic Magnetron System DAFC IFD RVP8/RXRVP8/IOSBC PCI BUS Digital STALO Received IF Magnetron IF triggers fiber downlink antenna angles 10 /100 BASE-T LAN K / V / M

Linearity