JAXA Level 2 (L2) Standard Products

Data Access

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Version History

Version Date Update Release Note
vBa 2025/3/13 Start of data provision PDF
vCb 2025/12/1 ・The Mirror Echo Flag (2nd trip echo, multiple scattering, and 2.4 km artifacts) was updated.
・The digital elevation model (DEM) was updated to use AW3D.
・The calculation of atmospheric attenuation was improved.		 PDF

Input Data

CPR_NOM
AUX_2DH
CPR_PER

Dimension

Name Number of Pixels Description
nray 5500 number of ray
nbin 218 number of bin
nbin_jsg 200 number of bin (Joint Standard Grid)

Variables

ScienceData
Variable Name Units Description/Attributes Dimention Type
Data        
integrated_radar_reflectivity_1km dBZ Radar reflectivity factor (1km integration)
attribute
 nray, nbin float
integrated_radar_reflectivity_10km dBZ Radar reflectivity factor (10km integration)
attribute
 nray, nbin float
integrated_radar_reflectivity_flag_1km - Quality flag for radar reflectivity (1km integration)
Bit0: using valid integration number, Bit1: using SNR as threshold
attribute
 nray, nbin uint
integrated_radar_reflectivity_flag_10km - Quality flag for radar reflectivity (10km integration)
Bit0: using valid integration number, Bit1: using SNR as threshold
attribute
 nray, nbin uint
surface_estimation_flag_1km - Quality flag for surface estimation (1km integration)
Bit0: difference with DEM, Bit1: large attenuation, Bit2: NRCS > threshold
attribute
 nray uint
surface_estimation_flag_10km - Quality flag for surface estimation (10km integration)
Bit0: using valid number of NRCS (1km integration)
attribute
 nray uint
clutter_echo_1km dBZ Estimated clutter echo intensity (1km integration)
attribute
 nray, nbin float
clutter_echo_10km dBZ Estimated clutter echo intensity (10km integration)
attribute
 nray, nbin float
surface_bin_number_1km - Estimated surface range bin number (1km integration)
attribute
 nray ushort
surface_bin_number_10km - Estimated surface range bin number (10km integaration)
attribute
 nray ushort
surface_bin_fraction_1km - Estimated surface bin fraction (1km integration)
attribute
 nray float
surface_bin_fraction_10km - Estimated surface bin fraction (10km integration)
attribute
 nray float
normalized_radar_cross_section_1km dB Normalized radar cross section (1km integration)
attribute
 nray float
normalized_radar_cross_section_10km dB Normalized radar cross section (10km integration)
attribute
 nray float
signal_to_noise_ratio_1km dB S/N ratio of reflectivity (1km integration)
attribute
 nray, nbin float
signal_to_noise_ratio_10km dB S/N ratio of reflectivity (10km integration)
attribute
 nray, nbin float
integrated_doppler_velocity_1km m/s Doppler velocity (1km integration)
attribute
 nray, nbin float
integrated_doppler_velocity_10km m/s Doppler velocity (10km integration)
attribute
 nray, nbin float
integrated_doppler_velocity_1km_bias_corr m/s Bias corrected Doppler velocity (1km integration)
attribute
 nray, nbin float
integrated_doppler_velocity_10km_bias_corr m/s Bias corrected Doppler velocity (10km integration)
attribute
 nray, nbin float
spectrum_width_1km m/s Doppler spectrum width (1km integration)
attribute
 nray, nbin float
spectrum_width_10km m/s Doppler spectrum width (10km integration)
attribute
 nray, nbin float
doppler_velocity_quality_flag_1km - Quality flag for Doppler velocity (1km integration)
Bit0: less valid number of integration
attribute
 nray, nbin uint
doppler_velocity_quality_flag_10km - Quality flag for Doppler velocity (10km integration)
Bit0: less valid number on integration
attribute
 nray, nbin uint
doppler_velocity_quality_flag_1km_bias_corr - Bias corrected quality flag for Doppler velocity (1km)
Bit0: less valid number of integration
attribute
 nray, nbin uint
doppler_velocity_quality_flag_10km_bias_corr - Bias corrected quality flag for Doppler velocity (10km)
Bit0: less valid number of integration
attribute
 nray, nbin uint
nyquist_velocity m/s Nyquist velocity determined by PRF
attribute
 nray float
integrated_gaseous_attenuation dB Integrated gaseous attenuation from TOA
attribute
 nray, nbin float
unfolded_doppler_velocity_1km m/s Unfolded Doppler velocity (1km integration)
attribute
 nray, nbin float
unfolded_doppler_velocity_10km m/s Unfolded Doppler velocity (10km integration)
attribute
 nray, nbin float
unfolded_doppler_velocity_1km_bias_corr m/s Bias corrected unfolded Doppler velocity (1km integration)
attribute
 nray, nbin float
unfolded_doppler_velocity_10km_bias_corr m/s Bias corrected unfolded Doppler velocity (10km integration)
attribute
 nray, nbin float
path_integrated_attenuation_1km dB Estimated path integrated attenuation at the surface (1km integration)
attribute
 nray float
path_integrated_attenuation_10km dB Estimated path integrated attenuation at the surface (10km integration)
attribute
 nray float
path_integrated_attenuation_flag_1km - Quality flag for estimated path integrated attenuation (1km integration)
Low 4bits: quality flag, High 4bits: method flag
attribute
 nray uint
path_integrated_attenuation_flag_10km - Quality flag for estimated path integrated attenuation (10km integration)
Low 4bits: quality flag, High 4bits: method flag
attribute
 nray uint
L2_quality_flag_1km - L2 quality flag (1km integration)
attribute
 nray uint
L2_quality_flag_10km - L2 quality flag (10km integration)
attribute
 nray uint
mirror_echo_flag_1km - Mirror echo flag (1km integration)
0: free from mirror contamination, 0x01 (1): clutter possible, 0x11 (17): clutter certain, 0x02 (2): mirror images possible, 0x22 (34): mirror images certain, 0x04 (4) : MS tails possible, 0x44 (68) : MS tails certain, 0x08 (8) : artifact possible, 0x88 (136) : artifact certain
attribute
 nray uint
mirror_echo_flag_10km - Mirror echo flag (10km integration)
0: free from mirror contamination, 0x01 (1): clutter possible, 0x11 (17): clutter certain, 0x02 (2): mirror images possible, 0x22 (34): mirror images certain, 0x04 (4) : MS tails possible, 0x44 (68) : MS tails certain, 0x08 (8) : artifact possible, 0x88 (136) : artifact certain
attribute
 nray uint
jsg_radar_reflectivity_1km_with_correction dBZ Clutter and gaseous attenuation-corrected radar reflectivity factor (JSG 1km integration)
attribute
 nray, nbin_jsg float
jsg_radar_reflectivity_10km_with_correction dBZ Clutter and gaseous attenuation-corrected radar reflectivity factor (JSG 10km integration)
attribute
 nray, nbin_jsg float
jsg_doppler_velocity_1km_with_correction m/s Unfolded Doppler velocity (JSG 1km integration)
attribute
 nray, nbin_jsg float
jsg_doppler_velocity_10km_with_correction m/s Unfolded Doppler velocity (JSG 10km integration)
attribute
 nray, nbin_jsg float
jsg_doppler_velocity_1km_with_correction_bias_corr m/s JSG bias corrected Doppler velocity (1km integration)
attribute
 nray, nbin_jsg float
jsg_doppler_velocity_10km_with_correction_bias_corr m/s JSG bias corrected Doppler velocity (10km integration)
attribute
 nray, nbin_jsg float
Geo        
number_of_ray - number of ray
attribute
 1 ushort
maximum_number_of_bin - Maximum number of bin (218 or 514)
attribute
 1 ushort
jsg_maximum_number_of_bin - Maximum number of JSG bin
attribute
 1 ushort
latitude degree_north Latitude
attribute
 nray double
longitude degree_east Longitude
attribute
 nray double
time seconds since 2000-1-1 00:00:00.0 0:00 Time
attribute
 nray double
day_night_flag - Day/night flag
0: night, 1: day
attribute
 nray ubyte
land_water_flag - Land/water flag
0: water, 1: land
attribute
 nray ubyte
land_water_fraction_1km - Land water fraction (1km integration)
0: water, 1: land
attribute
 nray float
land_water_fraction_10km - Land water fraction (10km integration)
0: water, 1: land
attribute
 nray float
range_to_intercept m  Distance to the reference elipsoid (WGS84)
attribute
 nray float
surface_elevation m Surface elevation (WGS84)
attribute
 nray float
surface_elevation_1km m  Surface elevation (WGS84 1km integration mean)
attribute
 nray float
surface_elevation_10km m Surface elevation (WGS84 10km integration mean: deviation: slope)
attribute
 nray float
surface_elevation_quality_flag_1km - Quality flag of surface elevation (1km integration)
Bit0: Cliff difference > threshold
attribute
 nray uint
surface_elevation_quality_flag_10km - Quality flag of surface elevation (10km integration)
Bit0: Cliff difference > threshold, Bit1: roughness > threshold
attribute
 nray uint
range_to_first_bin m  Range to first sampling bin
attribute
 nray float
range_bin_size m  Range bin size determined by sampling
attribute
 1 float
bin_height m Height of each sampling bin
attribute
 nray, nbin float
jsg_bin_height m Height of each JSG vertical bin
attribute
 nray, nbin_jsg float
Geo/Scan_Time　　　        
DayOfMonth - Day of month
attribute
:long_name = "Day of Month";
:_ChunkSizes = 1U; // uint
nray byte
DayOfYear - Day of year
attribute
:long_name = "DayofYear";
:_ChunkSizes = 1U; // uint

nray short
Hour - Hour
attribute
:long_name = "Hour";
:_ChunkSizes = 1U; // uint

nray byte
MilliSecond - MilliSecond
attribute
:long_name = "Millisecond";
:_ChunkSizes = 1U; // uint

nray float
Minute - Minute
attribute
:long_name = "Minute";
:_ChunkSizes = 1U; // uint

nray byte
Month - Month
attribute
:long_name = "Month";
:_ChunkSizes = 1U; // uint

nray byte
Second - Second
attribute
:long_name = "Second";
:_ChunkSizes = 1U; // uint

nray byte
SecondOfDay - Second of day
attribute
:long_name = "Second of Day";
:_ChunkSizes = 1U; // uint

nray int
Year - Year
attribute
:long_name = "Year";
:_ChunkSizes = 1U; // uint
nray short
HeaderData

Please reffer to the "Product Definition Document" for header information.