Chapter 2 _______________________________________________ Introduction and Specifications
VAISALA_______________________________________________________________________ 61
- Corrections for gaseous attenuation and 1/R
2
- Up to four pulse widths
Data Outputs:
- dBZ—Calibrated equivalent radar reflectivity, 8 bits or 16 bits
- V—Mean radial velocity, 8 bits or 16 bits
- W—Spectrum width, 8 bits or 16 bits
- I/Q—Time series, 16 bits each per sample
- DFT—Doppler spectrum output option in DFT mode, 16 bits per
component
- Optional: Z
dr
, PHIDP, RHOHV, LDR, RHO, 8 bits or 16 bits
Data Quality Thresholds:
- Signal-to-noise ratio (SNR)—Used to reject bins having weak
signals; typically applied to dBZ
- Signal quality index (SQI)—Used to reject bins having incoherent
signals; typically applied to mean velocity and width
- Clutter-to-signal ratio (CSR)—Used to reject range bins having very
strong clutter; typically applied to mean velocity, width, and dBZ
- Speckle Filter—Removes single-bin targets such as aircraft or noise;
fills isolated missing pixels as well
2.14.5 RVP900 Input/Output Summary
Ethernet Input/Output from Host Computer:
Data output of calibrated dBZ, V, and W during normal operation. Full I/Q
time series recording with a separate tsarchive utility, or through a
customer's application using a public API. Signal processor configuration
and verification read-back is performed through the Ethernet interface.
AZ/EL Angle Input Options:
- Serial AZ/EL angle tag input using standard Vaisala RCP format
- 16-bit each parallel TTL binary angles through the I/O-62 card
- Synchro angle inputs through the I/O-62 card
- RCP network antenna packet protocol
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