Chapter 2 _______________________________________________ Introduction and Specifications
VAISALA_______________________________________________________________________ 43
software. The frequency response of the filter can be displayed and
compared to the frequency content of the actual transmitted pulse.
Microwave energy can come from a variety of transmitters such as
ground-based, ship-based, or airborne radars as well as communications
links. These can cause substantial interference to a weather radar system.
Interference rejection is provided as standard in the RVP900. Three
different interference rejection algorithms are supported.
The RVP901 IFDR places the WDR “I” and “Q” samples directly on the
Ethernet line, where they are sent to the processor section of the PC (for
example, dual Intel Xeon processors on a motherboard). The I/Q values are
then processed on the Intel Xeon processors to extract the moment
information (Z, V, W, and optional polarization parameters).
2.9 RVP900 Weather Signal Processing
The processing of weather signals by the RVP900 is based on the
algorithms used in RVP8 and RVP7. However, the performance of the
RVP900 has a different approach to some of the processing algorithms,
especially the frequency domain spectrum processing. All of the
algorithms start with the WDR I and Q samples that are obtained from the
IFDR over the Ethernet.
The resulting intensity, radial velocity, spectrum width, and polarization
measurements are sent to a separate host computer to serve as input for
applications such as:
- Quantitative Rainfall Measurement
- Vertical Wind Profiling
-Z
dr
Hail Detection
- Tornado Detection and Microburst Detection
- Gust Front Detection
- Particle Identification
- Target Detection and Tracking
- General Weather Monitoring
To obtain the basic moments, the RVP900 has several major processing
modes options:
- Pulse Pair Mode Time Domain Processing
- DFT/FFT Mode Frequency Domain Processing
- Random Phase Mode for second trip echo filtering
- Polarization Mode Processing
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