-------------------------------- -------------------------------- D3R GCPEx Data Summary Updated Oct 30, 2015 ------------------------------- -------------------------------- Release 1 (September 2013) -------------------------------- GMAPTD clutter filter is enabled Range 0.15km is the transmitter pulse Release 1.1 (January 2014) -------------------------------- Development-only release (limited release, not published) This was processed with the initial D3R real-time GMAPTD moment processor (v1.00) GMAPTD clutter filtering disabled Range 0km is the transmitter pulse Release 2 (October 2015) -------------------------------- GMAPTD clutter filtering disabled D3R Moment Processor v2.13 used with D3R NC v1.06 Phidp initial phase is adjusted to be closer to zero degrees Zdr uses a 0 dB SNR threshold to provided more robust Zdr results The rhohv field CrossPolCorrelation is renamed to CopolarCorrelation Ka observations should be used in conjunction with an SNR threshold, typically SNR>0dB. (SNR is found in variable 'Signal+Clutter_toNoise_H') Ka band PHIDP may exhibit a discontinuity at the transition between the short and medium pulses. This is due to the different system phases of the two subpulses. Notes: 1) Ka ZDR may contain a bias that varies across different days during the experiment. Attempts were made to align the Zdr for the two pulses used but an overall Zdr bias correction was not applied. The end of the short pulse is 3.45km and the start of the medium pulse is 3.60km. 2) With the clutter filter enabled, near zero velocity precipitation power with narrow spectrum width and low SNR may be detected as ground clutter and removed. # D3R NETCDF LIBRARY v1.06 # ## Variables | Variable Name | Length | Data Type | Units | Note | | -------------------------- | ------------ | --------- | --------------------- | ------------- | | "Azimuth" | 1 | double | "Degrees" | | | "Elevation" | 1 | double | "Degrees" | | | "GateWidth" | 1 | int | "Millimeters" | | | "StartRange" | 1 | double | "Millimeters" | | | "StartGate" | 1 | int | "Unitless" | | | "Time" | 1 | int | "Seconds" | | | "TxFrequency_Short" | 1 | double | "Hertz" | | | "TxFrequency_Medium" | 1 | double | "Hertz" | | | "TxLength_Short" | 1 | double | "Seconds" | | | "TxLength_Medium" | 1 | double | "Seconds" | | | "TxPowerH_Short" | 1 | double | "dBm" | | | "TxPowerH_Medium" | 1 | double | "dBm" | | | "TxPowerV_Short" | 1 | double | "dBm" | | | "TxPowerV_Medium" | 1 | double | "dBm" | | | "TxPhaseH_Short" | 1 | double | "deg" | added v1.03 | | "TxPhaseV_Short" | 1 | double | "deg" | added v1.03 | | "TxPhaseH_Medium" | 1 | double | "deg" | added v1.03 | | "TxPhaseV_Medium" | 1 | double | "deg" | added v1.03 | | "NoiseSourcePowerH_Short" | 1 | double | "dBu" | added v1.03 | | "NoiseSourcePowerV_Short" | 1 | double | "dBu" | added v1.03 | | "RxGainH_Short" | 1 | double | "dB" | | | "RxGainH_Medium" | 1 | double | "dB" | | | "RxGainV_Short" | 1 | double | "dB" | | | "RxGainV_Medium" | 1 | double | "dB" | | | "ZDRBiasApplied_Short" | 1 | double | "dB" | | | "ZDRBiasApplied_Medium" | 1 | double | "dB" | | | "StartGate_Short" | 1 | int | "Unitless" | | | "StartGate_Medium" | 1 | int | "Unitless" | | | "GcfState" | 1 | int | "Unitless" | | | "PolarizationMode" | 1 | int | "Unitless" | added v1.04 | | "PRTMode" | 1 | int | "Unitless" | added v1.04 | | "Reflectivity" | # Gates | float | "dBZ" | | | "ReflectivityV" | # Gates | float | "dBZ" | added v1.03 | | "ReflectivityHV" | # Gates | float | "dBZ" | added v1.03 | | "Velocity" | # Gates | float | "MetersPerSecond" | | | "SpectralWidth" | # Gates | float | "MetersPerSecond" | | | "DifferentialReflectivity" | # Gates | float | "dB" | | | "DifferentialPhase" | # Gates | float | "Degrees" | | | "CopolarCorrelation" | # Gates | float | "Unitless" | renamed v1.05 | | "NormalizedCoherentPower" | # Gates | float | "Unitless" | | | "SignalPower_H" | # Gates | float | "dBu" | | | "SignalPower_V" | # Gates | float | "dBu" | added v1.03 | | "SignalPower_HV" | # Gates | float | "dBu" | added v1.03 | | "RawPower_H" | # Gates | float | "dBu" | added v1.04 | | "RawPower_V" | # Gates | float | "dBu" | added v1.04 | | "RawPower_HV" | # Gates | float | "dBu" | added v1.04 | | "GMAPTDIterations" | # Gates | int | "Unitless" | removed v1.05 | | "Signal+Clutter_toNoise_H" | # Gates | float | "dB" | | | "ClutterPowerH" | # Gates | float | "dBu" | | | "ClutterPowerV" | # Gates | float | "dBu" | | ## Alternate Transmission Mode Only (ALT only) Variables | Variable Name | Length | Data Type | Units | Note | | -------------------------- | ------------ | --------- | --------------------- | ------------- | | "LDRvh" | # Gates | float | "dB" | added v1.06 | | "LDRhv" | # Gates | float | "dB" | added v1.06 | | "LDRe" | # Gates | float | "dB" | added v1.06 | | "SNRvh" | # Gates | float | "dB" | added v1.06 | | "SNRhv" | # Gates | float | "dB" | added v1.06 | ## Attributes | Attribute Name | Description | Note | | --------------------- | ------------------------------------------------- | ------------- | | "NetCDFRevision" | NETCDF revision | | | "GMAPTDRevision" | GMAPTD moment code revision | | | "ConfigRevision" | GMAPTD Config file revision | | | "CampaignName" | Campaign Name | added v1.02 | | "RadarName" | Radar Name | | | "Latitude" | Latitude in degrees | | | "Longitude" | Longitude in degrees | | | "Altitude" | Altitude in meters | | | "NumGates" | Number of Range Gates | | | "ScanId" | Always 0 | | | "ScanFlag" | Scanning Off=0 or On=1 | remove v1.04 | | "ScanType" | 1=Fixed, 2=PPI, 3=RHI | | | "Time" | Epoch time (seconds) | | | "Archive" | Archive enabled flag (always 1) | remove v1.04 | | "SweepNumber" | Sweep Number within a volume | added v1.02 | ## Notes "PolarizationMode" states - 0: Passive (no transmitter fired) - 1: H Only - 2: V Only - 3: Alternate - 4: Simultaneous - 99: Error "PRTMode" states - 0: Uniform PRT - 1: Staggered 2/3 PRT "GcfState" states (ground clutter filtering) - 0: Off - No ground clutter filter used - 1: On - GMAPTD ground clutter filtering enabled