A number of slightly different data sets were logged at the S-Pol system during PECAN. Data sets were created for Base Data (in both a moments and a covariance form), Particle ID/RainRate, and a QPE data set for use in creating a rain amount product with other radars. There were over 50 named parameters logged between all of these data sets. A list and description is presented. A final, merged, data set will contain many of these same variables (with any corrections applied), and may also include additional variables.
Note that for the in-field data set, many of these parameters are collected for diagnostic purposes, and may not appear in the final data set. Also note that the convention of using an "_F" indicates that the S-Pol clutter filter and CMD has been applied to the data, but that the final data set may contain only the clutter-filtered parameters, and that the "_F" may be deleted from those parameter names.
| Parameter Units |
Standard Name Long Name |
Comments: |
|---|---|---|
| DBZ dBZ |
equivalent_reflectivity_factor reflectivity |
Field-calibrated, not clutter filtered; elevation angle-dependent atmospheric attenuation applied, as in Doviak and Zrnic, 1993 (pp.44-45) |
| DBZ_F dBZ |
equivalent_reflectivity_factor reflectivity |
Field-calibrated, clutter filtered; elevation angle-dependent atmospheric attenuation applied, as in Doviak and Zrnic, 1993 (pp.44-45) |
| VEL m/s |
radial_velocity_of_scatterers_away_from_instrument doppler_velocity |
Traditional fast-alternating dual-pol velocity estimate, from H and V interspersed signal, with phase offset (Wilson/Illingworth/Blackman, 1997). This velocity is noisy if PHIDP is noisy. Nyquist velocity is ~26.7 m/s. Not Clutter-filtered. |
| VEL_F m/s |
radial_velocity_of_scatterers_away_from_instrument doppler_velocity_filtered |
Traditional fast-alternating dual-pol velocity estimate, from H and V interspersed signal, with phase offset (Wilson/Illingworth/Blackman, 1997). This velocity is noisy if PHIDP is noisy. Nyquist velocity is ~26.7 m/s. Clutter-fltered. |
| VEL_HV m/s |
radial_velocity_of_scatterers_away_from_instrument doppler_velocity_hv_channels_separately |
Velocity from H-only pulses, averaged with velocity from V-only pulses; reprocessed from phase information in covariance data set. This velocity is useful in regions where PHIDP is noisy, as when there is significant phase-shift on backscatter (e.g., gust fronts and bird echoes). Nyquist velocity is ~13.3 m/s. Not clutter-filtered. |
| VEL_HV_F m/s |
radial_velocity_of_scatterers_away_from_instrument doppler_velocity_hv_channels_separately_filtered |
(same as previous, but with clutter filter applied) |
| VEL_ALT m/s |
radial_velocity_of_scatterers_away_from_instrument doppler_velocity_alternating_mode |
Derived from VEL_HV, unfolded to wider Nyquist interval using VEL. This is the recommended velocity field for general use, except in cases where there is significant noise in PHIDP. This velocity is generally less noisy than the VEL_S, but may sometimes be unfolded into the wrong velocity interval. The working Nyquist interval is ~26.7 m/s. |
| VEL_ALT_F m/s |
radial_velocity_of_scatterers_away_from_instrument doppler_velocity_alternating_mode_filtered |
(same as previous, but with clutter filter applied) |
| WIDTH m/s |
doppler_spectrum_width spectrum_width |
Doppler spectrum velocity width |
| WIDTH_F m/s |
doppler_spectrum_width spectrum_width_filtered |
(same as previous, but with clutter filter applied) |
| CLUT dB |
clutter_power clutter_power |
Clutter power removed. See Steiner and Smith, 2002; Hubbert, et al., 2009a, and Hubbert, et al., 2009b. |
| ZDR dB |
log_differential_reflectivity_hv differential_reflectivity |
ZDR defined by Seliga and Bringi, 1976. Derived from calibrated copolar reflectivities; zdr bias from vertical pointing data applied (same bias as used for the in-field data set). See bias determination report. |
| ZDR_F dB |
log_differential_reflectivity_hv differential_reflectivity_filtered |
(same as previous, but with clutter filter applied) |
| ZDRM dB |
log_differential_reflectivity_hv differential_reflectivity_uncalibrated |
ZDR defined by Seliga and Bringi, 1976. Derived from calibrated copolar reflectivities; zdr bias not applied. (ZDR "measured") |
| ZDRM_F dB |
log_differential_reflectivity_hv differential_reflectivity_uncalibrated_filtered |
(same as previous, but with clutter filter applied) |
| ZDR_BIAS dB |
log_differential_reflectivity_bias differential_reflectivity_bias |
in-field estimated ZDR bias (used for diagnostic purposes, only) |
| ZDR_BIAS_F dB |
log_differential_reflectivity_bias differential_reflectivity_bias_filtered |
(same as previous, but with clutter filter applied) |
| LDRH dB |
log_linear_depolarization_ratio_h linear_depolarization_ratio_hc_to_vx |
Calibrated and noise-corrected. Transmit H-polarization, receive V. |
| LDRH_F dB |
log_linear_depolarization_ratio_h linear_depolarization_ratio_ratio_hv_to_vx_filtered |
(same as previous, but with clutter filter applied) |
| LDRV dB |
log_linear_depolarization_ratio_v linear_depolarization_ratio_vc_to_hx |
Calibrated and noise-corrected. Transmit V-polarization, receive H. |
| LDRV_F dB |
log_linear_depolarization_ratio_v linear_depolarization_ratio_vc_to_hx_filtered |
(same as previous, but with clutter filter applied) |
| LDR_DIFF_F dB |
log_linear_depolarization_ratio_v ldrv_minus_ldrh |
Difference of depolarization ratios, LDRV_F minus LDRH_F |
| LDR_MEAN_F dB |
log_linear_depolarization_ratio_h mean_of_ldrv_and_ldrh |
Mean of LDRH_F and LDRV_F |
| RHOHV none |
cross_correlation_ratio_hv cross_correlation_ratio |
in-field noise-corrected RHOHV. Provides a more consistent value in regions of low SNR. Derived from original (in-field) covariance data set. (see Zrnic, 1988 for formulation). |
| RHOHV_F none |
cross_correlation_ratio_hv cross_correlation_ratio_filtered |
(same as previous, but with clutter filter applied) |
| RHOHV_NNC none |
cross_correlation_ratio_hv cross_correlation_ratio_no_noise_correction |
in-field RHOHV, not noise corrected. |
| RHOHV_NNC_F none |
cross_correlation_ratio_hv cross_correlation_ratio_no_noise_correction_filtered |
(same as previous, but with clutter filter applied) |
| RHO_HC_VX none |
cross_correlation_ratio_hcvx cross_correlation_ratio_hc_to_vx |
Ratio of correlation coefficients, HC to VX (horizontal co-polar to Vertical cross-polar) |
| RHO_VC_HX none |
cross_correlation_ratio_hchx cross_correlation_ratio_vc_to_hx |
Ratio of correlation coefficients, VC to HX |
| RHO_VX_HX none |
cross_correlation_ratio_hchx cross_correlation_ratio_vx_to_hx |
Ratio of correlation coefficients, VX to HX |
| PHIDP0 deg |
system_differential_phase_hv system_differential_phase |
|
| PHIDP0_F deg |
system_differential_phase_hv system_differential_phase_filtered |
(same as previous, but with clutter filter applied) |
| PHIDP deg |
differential_phase_hv differential_phase |
See Jameson and Mueller, 1985; processed according to Hubbert and Bringi, 1995. |
| PHIDP_F deg |
differential_phase_hv differential_phase_filtered |
(same as previous, but with clutter filter applied) |
| KDP deg/km |
specific_differential_phase_hv specific_differential_phase |
Processed according to Hubbert and Bringi, 1995. |
| KDP_F deg/km |
specific_differential_phase_hv specific_differential_phase_filtered |
(same as previous, but with clutter filter applied) |
| SNRHC dB |
signal_to_noise_ratio_co_polar_h signal_to_noise_ratio_co_polar_h |
|
| SNRHC_F dB |
signal_to_noise_ratio_co_polar_h signal_to_noise_ratio_co_polar_h_filtered |
(same as previous, but with clutter filter applied) |
| SNRHX dB |
signal_to_noise_ratio_cross_polar_h signal_to_noise_ratio_cross_polar_h |
|
| SNRHX_F dB |
signal_to_noise_ratio_cross_polar_h signal_to_noise_ratio_cross_polar_h_filtered |
(same as previous, but with clutter filter applied) |
| SNRVC dB |
signal_to_noise_ratio_co_polar_v signal_to_noise_ratio_co_polar_v |
|
| SNRVC_F dB |
signal_to_noise_ratio_co_polar_v signal_to_noise_ratio_co_polar_v_filtered |
(same as previous, but with clutter filter applied) |
| SNRVX dB |
signal_to_noise_ratio_cross_polar_v signal_to_noise_ratio_cross_polar_v |
|
| SNRVX_F dB |
signal_to_noise_ratio_cross_polar_v signal_to_noise_ratio_cross_polar_v_filtered |
(same as previous, but with clutter filter applied) |
| DBMHC dBm |
log_power_co_polar_h log_power_co_polar_h |
|
| DBMHC_F dBm |
log_power_co_polar_h log_power_co_polar_h_filtered |
(same as previous, but with clutter filter applied) |
| DBMHX dBm |
log_power_cross_polar_h log_power_cross_polar_h |
|
| DBMHX_F dBm |
log_power_cross_polar_h log_power_cross_polar_h_filtered |
(same as previous, but with clutter filter applied) |
| DBMVC dBm |
log_power_co_polar_v log_power_co_polar_v |
|
| DBMVC_F dBm |
log_power_co_polar_v log_power_co_polar_v_filtered |
(same as previous, but with clutter filter applied) |
| DBMVX dBm |
log_power_cross_polar_v log_power_cross_polar_v |
|
| DBMVX_F dBm |
log_power_cross_polar_v log_power_cross_polar_v_filtered |
(same as previous, but with clutter filter applied) |
| NOISE_BIAS dB |
bias_in_noise_floor bias_in_noise_floor_from_thermal_effect |
|
| NCP | normalized_coherent_power normalized_coherent_power |
|
| NCP_F | normalized_coherent_power normalized_coherent_power_filtered |
(same as previous, but with clutter filter applied) |
| CPA none |
clutter_phase_alignment clutter_phase_alignment |
See Steiner and Smith, 2002; Hubbert, et al., 2009a, and Hubbert, et al., 2009b. |
| TDBZ none |
texture_of_reflectivity texture_of_reflectivity |
See Steiner and Smith, 2002; Hubbert, et al., 2009a, and Hubbert, et al., 2009b. |
| SPIN none |
spin_of_reflectivity spin_of_reflectivity |
See Steiner and Smith, 2002; Hubbert, et al., 2009a, and Hubbert, et al., 2009b. |
| ZDR_SDEV none |
standard_deviation_of_zdr standard_deviation_of_zdr |
|
| PHIDP_SDEV none |
standard_deviation_of_phidp standard_deviation_of_phidp |
|
| CMD none |
clutter_mitigation_decision clutter_mitigation_interest |
See Steiner and Smith, 2002; Hubbert, et al., 2009a, and Hubbert, et al., 2009b. |
| CMD_FLAG none |
clutter_mitigation_decision_flag clutter_mitigation_interest_flag |
See Steiner and Smith, 2002; Hubbert, et al., 2009a, and Hubbert, et al., 2009b. |
| AIQ deg |
AIQ AIQ |
Average phase of backscattered power (HH). AIQ is used in the Fabry refractive index work for the determination of virtual temperature. Fabry, 2004; Fabry et al., 1997; Weckwerth et al., 2005. |
| NIQ dBm |
NIQ NIQ |
Average magnitude of backscatter pwr (HH). Fabry, 2004; Fabry et al., 1997; Weckwerth et al., 2005. |
| KDP_FOR_RATE deg/km |
specific_differeential_phase_hv specific_differential_phase |
|
| DBZ_FOR_RATE dBZ |
equivalent_reflectivity_factor radar_reflectivity |
|
| ZDR_FOR_RATE dB |
log_differential_reflectivity calibrated_log_differential_reflectivity |
|
| KDP deg/km |
specific_differential_phase_hv specific_differential_phase |
|
| PID | hydrometeor_type particle_id |
See Vivekanandan, et al., 1999 for details. Modifications made by Scott Ellis to tune fuzzy logic for PECAN. The in-field version of PID may differ somewhat from the final PID. |
| TEMP_FOR_PID C |
temperature temperature_for_computing_pid |
|
| SDZDR_FOR_PID dB |
sdev_of_zdr sdev_of_zdr_for_computing_pid |
|
| SDPHIDP_FOR_PID deg |
sdev_of_phidp sdev_of_phidp_for_computing_pid |
|
| RATE_ZH mm/hr |
precip_rate_from_z precip_rate_from_z |
|
| RATE_ZH_SNOW mm/hr |
precip_rate_from_z_in_snow precip_rate_from_z_in_snow |
|
| RATE_Z_ZDR mm/hr |
precip_rate_from_z_and_zdr precip_rate_from_z_and_zdr |
|
| RATE_KDP mm/hr |
precip_rate_from_kdp precip_rate_from_kdp |
|
| RATE_KDP_ZDR mm/hr |
precip_rate_from_z_and_zdr precip_rate_from_z_and_zdr |
|
| RATE_KDP mm/hr |
precip_rate_from_kdp precip_rate_from_kdp |
|
| RATE_KDP_ZDR mm/hr |
precip_rate_from_kdp_and_zdr precip_rate_from_kdp_and_zdr |
|
| RATE_HYBRID mm/hr |
precip_rate_hybrid_of_zh_zzdr_kdp_and_kdpzdr precip_rate_hybrid_of_zh_zzdr_kdp_and_kdpzdr |
|
| RATE_PID mm/hr |
precip_rate_based_on_pid precip_rate_from_pid_weights |
|
| RATE_BRINGI mm/hr |
precip_rate_bringi_of_zh_zzdr_kdp_and_kdpzdr precip_rate_bringi_of_zh_zzdr_kdp_and_kdpzdr |
|
| RATE_HIDRO mm/hr |
precip_rate_hidro_of_zh_zzdr_kdp_and_kdpzdr precip_rate_hidro_of_zh_zzdr_kdp_and_kdpzdr |
|
| DBZ dBZ |
equivalent_reflectivity_factor reflectivity |
|
| VEL m/s |
radial_velocity_of_scatterers_away_from_instrument doppler_velocity_filtered |
|
| WIDTH m/s |
doppler_spectrum_width spectrum_width_filtered |
|
| ZDR dB |
log_differential_reflectivity_hv differential_reflectivity_filtered |
|
| PHIDP deg |
differential_phase_hv differential_phase_filtered |
| PID none |
PID PID |
See Vivekanandan, et al., 1999 for details. Modifications made by Scott Ellis to tune fuzzy logic for PECAN. The in-field version of PID may differ somewhat from the final PID. |
| HEIGHT km |
HEIGHT_MSL HEIGHT_MSL |
|
| RANGE km |
range_from_radar range_from_radar |
|
| NBLOCK count |
NBLOCK NBLOCK |
|
| NLOW_SNR count |
NLOW_SNR NLOW_SNR |
|
| NCLUT count |
NCLUT NCLUT |
|
| RATE_ZH mm/h |
RATE_ZH RATE_ZH |
|
| RATE_Z_ZDR mm/h |
RATE_Z_ZDR RATE_Z_ZDR |
|
| RATE_KDP mm/h |
RATE_KDP RATE_KDP |
|
| RATE_PID mm/h |
RATE_PID RATE_PID |
| SNRHC dB |
SNRHC SNRHC |
|
| CPA | CPA clutter_phase_alignment |
See Steiner and Smith, 2002; Hubbert, et al., 2009a, and Hubbert, et al., 2009b. |
| CMD_FLAG | CMD_FLAG clutter_mitigation_decision_flag |
See Steiner and Smith, 2002; Hubbert, et al., 2009a, and Hubbert, et al., 2009b. |
| AIQ deg |
AIQ mean_phase_from_phasor_sum |
Average phase of backscattered power (HH). AIQ is used in the Fabry refractive index work for the determination of virtual temperature. Fabry, 2004; Fabry et al., 1997; Weckwerth et al., 2005. |
| NIQ dBm |
NIQ log_mean_power_from_phasor_sum |
Average magnitude of backscatter pwr (HH). Fabry, 2004; Fabry et al., 1997; Weckwerth et al., 2005. |
| LAG0_HC_DB dBm |
LAG0_HC_DB log_lag0_power_hc_hc |
|
| LAG0_HC_DB_F dBm |
LAG0_HC_DB_F filtered_log_lag0_power_hc_hc |
(same as previous, but with clutter filter applied) |
| LAG0_HX_DB dBm |
LAG0_HX_DB log_lag0_power_hx_hx |
|
| LAG0_HX_DB_F dBm |
LAG0_HX_DB_F filtered_log_lag0_power_hx_hx |
(same as previous, but with clutter filter applied) |
| LAG0_VC_DB dBm |
LAG0_VC_DB log_lag0_power_vc_vc |
|
| LAG0_VC_DB_F dBm |
LAG0_VC_DB_F filtered_log_lag0_power_vc_vc |
(same as previous, but with clutter filter applied) |
| LAG0_VX_DB dBm |
LAG0_VX_DB log_lag0_power_vx_vx |
|
| LAG0_VX_DB_F dBm |
LAG0_VX_DB_F filtered_log_lag0_power_vx_vx |
(same as previous, but with clutter filter applied) |
| LAG0_HCVX_DB dBm |
LAG0_HCVX_DB log_lag0_power_hc_vx |
|
| LAG0_HCVX_DB_F dBm |
LAG0_HCVX_DB_F filtered_log_lag0_power_hc_vx |
(same as previous, but with clutter filter applied) |
| LAG0_HCVX_PHASE deg |
LAG0_HCVX_PHASE log_lag0_phase_hc_vx |
|
| LAG0_HCVX_PHASE_F deg |
LAG0_HCVX_PHASE_F filtered_log_lag0_phase_hc_vx |
(same as previous, but with clutter filter applied) |
| LAG0_VCHX_DB dBm |
LAG0_VCHX_DB log_lag0_power_vc_hx |
|
| LAG0_VCHX_DB_F dBm |
LAG0_VCHX_DB_F filtered_log_lag0_power_vc_hx |
(same as previous, but with clutter filter applied) |
| LAG0_VCHX_PHASE deg |
LAG0_VCHX_PHASE log_lag0_phase_vc_hx |
|
| LAG0_VCHX_PHASE_F deg |
LAG0_VCHX_PHASE_F filtered_log_lag0_phase_vc_hx |
(same as previous, but with clutter filter applied) |
| LAG1_HCVC_DB dBm |
LAG1_HCVC_DB log_lag1_power_hc_vc |
|
| LAG1_HCVC_DB_F dBm |
LAG1_HCVC_DB_F filtered_log_lag1_power_hc_vc |
(same as previous, but with clutter filter applied) |
| LAG1_HCVC_PHASE deg |
LAG1_HCVC_PHASE lag1_phase_hc_vc |
|
| LAG1_HCVC_PHASE_F deg |
LAG1_HCVC_PHASE_F filtered_lag1_phase_hc_vc |
(same as previous, but with clutter filter applied) |
| LAG1_VCHC_DB dBm |
LAG1_VCHC_DB log_lag1_power_vc_hc |
|
| LAG1_VCHC_DB_F dBm |
LAG1_VCHC_DB_F filtered_log_lag1_power_vc_hc |
(same as previous, but with clutter filter applied) |
| LAG1_VCHC_PHASE deg |
LAG1_VCHC_PHASE lag1_phase_vc_hc |
|
| LAG1_VCHC_PHASE_F deg |
LAG1_VCHC_PHASE_F filtered_lag1_phase_vc_hc |
(same as previous, but with clutter filter applied) |
| LAG2_HC_DB dBm |
LAG2_HC_DB log_lag2_power_hc_hc |
|
| LAG2_HC_DB_F dBm |
LAG2_HC_DB_F filtered_log_lag2_power_hc_hc |
(same as previous, but with clutter filter applied) |
| LAG2_HC_PHASE deg |
LAG2_HC_PHASE lag2_phase_hc |
|
| LAG2_HC_PHASE_F deg |
LAG2_HC_PHASE_F filtered_lag2_phase_hc |
(same as previous, but with clutter filter applied) |
| LAG2_VC_DB dBm |
LAG2_VC_DB log_lag2_power_vc_vc |
|
| LAG2_VC_DB_F dBm |
LAG2_VC_DB_F filtered_log_lag2_power_vc_vc |
(same as previous, but with clutter filter applied) |
| LAG2_VC_PHASE deg |
LAG2_VC_PHASE lag2_phase_vc |
|
| LAG2_VC_PHASE_F deg |
LAG2_VC_PHASE_F filtered_lag2_phase_vc |
(same as previous, but with clutter filter applied) |
| LAG3_VC_PHASE_F deg |
LAG3_VC_PHASE_F filtered_lag3_phase_vc_hc |
