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 ・Surface detection capability was enhanced, reducing cloud misclassification.
・The strength of vertical smoothing in the optical property retrieval algorithm was adjusted to reduce variability in the depolarization ratio and lidar ratio.
・The processing speed was improved by approximately 40%.
・The elevation data used in the processing were changed to AW3D (from AUX_2D).
・Margins remaining in the along‑track direction originating from the Level 1 data were removed.		 PDF

Input Data

ATL_NOM
AUX_2DH

Dimension

Name Number of Pixels Description
nray1 20000 number of ray (0.3km)
nray2 5000 number of ray (1km, 10km)
nbin 242 number of bin

Variables

ScienceData
Variable Name Units Description/Attributes Dimention Type
Data   　 　 　
aerosol_backscatter_10km /m/sr Aerosol backscatter coefficient (10km)
attribute
 nray2, nbin float
aerosol_depolarization_10km % Aerosol depolarization ratio (10km)
attribute
 nray2, nbin float
aerosol_extinction_10km /m Aerosol extinction coefficient (10km)
attribute
 nray2, nbin float
aerosol_lidar_ratio_10km sr Aerosol lidar ratio (10km)
attribute
 nray2, nbin float
attenuated_backscatter_10km /m/sr Attenuated backscatter coefficient (10km)
attribute
 nray2, nbin float
attenuated_backscatter_1km /m/sr Attenuated backscatter coefficient (1km)
attribute
 nray2, nbin float
cloud_backscatter_10km /m/sr Cloud backscatter coefficient (10km)
attribute
 nray2, nbin float
cloud_backscatter_1km /m/sr Cloud backscatter coefficient (1km)
attribute
 nray2, nbin float
cloud_depolarization_10km % Cloud depolarization ratio (10km)
attribute
 nray2, nbin float
cloud_depolarization_1km % Cloud depolarization ratio (1km)
attribute
 nray2, nbin float
cloud_extinction_10km /m Cloud extinction coefficient (10km)
attribute
 nray2, nbin float
cloud_extinction_1km /m Cloud extinction coefficient (1km)
attribute
 nray2, nbin float
cloud_lidar_ratio_10km sr Cloud lidar ratio (10km)
attribute
 nray2, nbin float
cloud_lidar_ratio_1km sr Cloud lidar ratio (1km)
attribute
 nray2, nbin float
crosspolar_attenuated_backscatter_10km /m/sr Crosspolar attenuated backscatter coefficient (10km)
attribute
 nray2, nbin float
crosspolar_attenuated_backscatter_1km /m/sr Crosspolar attenuated backscatter coefficient (1km)
attribute
 nray2, nbin float
feature_mask_03km - Feature mask (0.3km)
00: Invalid (no data, noisy)
02: Clear air or Aerosol
03: Cloud
10: Surface
11: Subsurface
12: Fully attenutated
13: Unknown
attribute
 nray1, nbin byte
feature_mask_10km - Feature mask (10km)
00: Invalid (no data, noisy)
01: Clear air
02: Aerosol
03: Cloud
10: Surface
11: Subsurface
12: Fully attenutated
13: Unknown
attribute
 nray2, nbin byte
feature_mask_1km - Feature mask (1km)
00: Invalid (no data, noisy)
02: Clear air or Aerosol
03: Cloud
10: Surface
11: Subsurface
12: Fully attenutated
13: Unknown
attribute
 nray2, nbin byte
L2_quality_flag_10km - L2 quality flag (10km)
attribute
 nray2 int
L2_quality_flag_1km - L2 quality flag (1km)
attribute
 nray2 int
PBL_height_10km m Planetary boundary layer height (10km)
attribute
 nray2 float
quality_flag_03km - Quality flag (0.3km)
attribute
 nray1, nbin byte
quality_flag_10km - Quality flag (10km)
attribute
 nray2, nbin byte
quality_flag_1km - Quality flag (1km)
attribute
 nray2, nbin byte
target_mask_10km - Target mask (10km)
00: Invalid (no data, noisy)
01: Clear air
11: Warm water cloud
12: Supercooled water cloud
13: 2D ice plate cloud
14: 3D ice cloud
19: Unknown clouds
21: Marine aerosol
22: Smoke
23: Dust
24: Dusty mixture
25: Pollution
26: Pristine
29: Unknown aerosols
attribute
 nray2, nbin byte
target_mask_1km - Target mask (1km, cloud only)
00: Invalid (no data, noisy)
02: Clear air or Aerosol
11: Warm water cloud
12: Supercooled water cloud
13: 2D ice plate cloud
14: 3D ice cloud
19: Unknown clouds
attribute
 nray2, nbin byte
volume_depolarization_ratio_10km % Volume depolarization ratio (10km)
attribute
 nray2, nbin float
volume_depolarization_ratio_1km % Volume depolarization ratio (1km)
attribute
 nray2, nbin float
Geo   　 　 　
day_night_flag - Day/night flag
0: night, 1: day
attribute
 nray2 byte
height m Altitude of pixels center above WGS84 ellipsoid (1km)
attribute
 nray2 float
height_03km m Altitude of pixels center above WGS84 ellipsoid (0.3km)
attribute
 nray1 float
land_water_flag - Land/water flag
0: water, 1: land
attribute
 nray2 byte
latitude degree_north Latitude
attribute
 nray2 double
latitude_03km degree_north Latitude (0.3km)
attribute
 nray1 double
longitude degree_east Longitude
attribute
 nray2 double
longitude_03km degree_east Longitude (0.3km)
attribute
 nray1 double
surface_elevation m Terrain elevatino for JSG pixel center above WGS84 ellipsoid
attribute
 nray2 double
time seconds since 2000-1-1 00:00:00.0 0:00 Time (1km)
attribute
 nray2 double
time_03km seconds since 2000-1-1 00:00:00.0 0:00 Time (0.3km)
attribute
 nray1 double
Geo/Scan_Time   　 　
DayOfMonth - Day of month
attribute
:long_name = "Day of Month";
:_ChunkSizes = 1U; // uint
along  byte
DayOfYear - Day of year
attribute
:long_name = "DayofYear";
:_ChunkSizes = 1U; // uint
along  short
Hour - Hour
attribute
:long_name = "Hour";
:_ChunkSizes = 1U; // uint
along  byte
MilliSecond - MilliSecond
attribute
:long_name = "Millisecond";
:_ChunkSizes = 1U; // uint
along  float
Minute - Minute
attribute
:long_name = "Minute";
:_ChunkSizes = 1U; // uint
along  byte
Month - Month
attribute
:long_name = "Month";
:_ChunkSizes = 1U; // uint
along  byte
Second - Second
attribute
:long_name = "Second";
:_ChunkSizes = 1U; // uint
along  byte
SecondOfDay - Second of day
attribute
:long_name = "Second of Day";
:_ChunkSizes = 1U; // uint
along  int
Year - Year
attribute
:long_name = "Year";
:_ChunkSizes = 1U; // uint
along  short
Geo/Scan_Time_03km   　 　 　
DayOfMonth_03km - Day of month
attribute
:long_name = "Day of Month";
:_ChunkSizes = 1U; // uint
along  byte
DayOfYear_03km - Day of year
attribute
:long_name = "DayofYear";
:_ChunkSizes = 1U; // uint
along  short
Hour_03km - Hour
attribute
:long_name = "Hour";
:_ChunkSizes = 1U; // uint
along  byte
MilliSecond_03km - MilliSecond
attribute
:long_name = "Millisecond";
:_ChunkSizes = 1U; // uint
along  float
Minute_03km - Minute
attribute
:long_name = "Minute";
:_ChunkSizes = 1U; // uint
along  byte
Month_03km - Month
attribute
:long_name = "Month";
:_ChunkSizes = 1U; // uint
along  byte
Second_03km - Second
attribute
:long_name = "Second";
:_ChunkSizes = 1U; // uint
along  byte
SecondOfDay_03km - Second of day
attribute
:long_name = "Second of Day";
:_ChunkSizes = 1U; // uint
along  int
Year_03km - Year
attribute
:long_name = "Year";
:_ChunkSizes = 1U; // uint
along  short
HeaderData

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