obs_id[
atrack=
0
..44]
[
xtrack=
0
..29]
(Type is String)
-
attributes
-
long_name:
observation id for FOR
-
description:
unique observation identifier: yyyymmddThhmm.aaSxx. Includes gran_id plus 2-digit along-track index (01-45), scene identifier (E=earth, H=hot, C=cold) and 2-digit cross-track index (01-30).
-
coverage_content_type:
referenceInformation
fov_obs_id[
atrack=
0
..44]
[
xtrack=
0
..29]
[
fov=
0
..8]
(Type is String)
-
attributes
-
long_name:
observation id for FOV
-
description:
unique observation identifier for FOV: yyyymmddThhmm.aaSxx.f . Includes gran_id plus 2-digit along-track index (01-45), scene identifier (E=earth, H=hot, C=cold) , 2-digit cross-track index (01-30), and 1-digit FOV number (1-9).
-
coverage_content_type:
referenceInformation
obs_time_tai93[
atrack=
0
..44]
[
xtrack=
0
..29]
(Type is Float64)
-
attributes
-
units:
seconds since 1993-01-01 00:00
-
valid_range:
-2934835217.000000, 3376598410.000000
-
long_name:
earth view FOV midtime
-
standard_name:
time
-
description:
earth view observation midtime for each FOV
-
AIRS_name:
Time
-
_FillValue:
9.969209968386869e+36
-
coverage_content_type:
referenceInformation
obs_time_utc[
atrack=
0
..44]
[
xtrack=
0
..29]
[
utc_tuple=
0
..7]
(Type is UInt16)
-
attributes
-
long_name:
earth view UTC FOV time
-
coordinates:
utc_tuple_lbl
-
description:
UTC earth view observation time as an array of integers: year, month, day, hour, minute, second, millisec, microsec
-
_FillValue:
65535
-
coverage_content_type:
referenceInformation
lat[
atrack=
0
..44]
[
xtrack=
0
..29]
[
fov=
0
..8]
(Type is Float32)
-
attributes
-
units:
degrees_north
-
valid_range:
-90.0000000, 90.0000000
-
long_name:
latitude
-
standard_name:
latitude
-
description:
latitude of FOV center
-
AIRS_name:
Longitude
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
referenceInformation
-
bounds:
lat_bnds
lat_geoid[
atrack=
0
..44]
[
xtrack=
0
..29]
[
fov=
0
..8]
(Type is Float32)
-
attributes
-
units:
degrees_north
-
valid_range:
-90.0000000, 90.0000000
-
long_name:
latitude
-
standard_name:
latitude
-
description:
latitude of FOV center on the geoid (without terrain correction)
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
referenceInformation
lon[
atrack=
0
..44]
[
xtrack=
0
..29]
[
fov=
0
..8]
(Type is Float32)
-
attributes
-
units:
degrees_east
-
valid_range:
-180.000000, 180.000000
-
long_name:
longitude
-
standard_name:
longitude
-
description:
longitude of FOV center
-
AIRS_name:
Longitude
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
referenceInformation
-
bounds:
lon_bnds
lon_geoid[
atrack=
0
..44]
[
xtrack=
0
..29]
[
fov=
0
..8]
(Type is Float32)
-
attributes
-
units:
degrees_east
-
valid_range:
-180.000000, 180.000000
-
long_name:
longitude
-
standard_name:
longitude
-
description:
longitude of FOV center on the geoid (without terrain correction)
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
referenceInformation
lat_bnds[
atrack=
0
..44]
[
xtrack=
0
..29]
[
fov=
0
..8]
[
fov_poly=
0
..7]
(Type is Float32)
-
attributes
-
units:
degrees_north
-
valid_range:
-90.0000000, 90.0000000
-
long_name:
FOV boundary latitudes
-
description:
latitudes of points forming a polygon around the perimeter of the FOV
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
referenceInformation
lon_bnds[
atrack=
0
..44]
[
xtrack=
0
..29]
[
fov=
0
..8]
[
fov_poly=
0
..7]
(Type is Float32)
-
attributes
-
units:
degrees_east
-
valid_range:
-180.000000, 180.000000
-
long_name:
FOV boundary longitudes
-
description:
longitudes of points forming a polygon around the perimeter of the FOV
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
referenceInformation
land_frac[
atrack=
0
..44]
[
xtrack=
0
..29]
[
fov=
0
..8]
(Type is Float32)
-
attributes
-
units:
1
-
valid_range:
0.00000000, 1.00000000
-
long_name:
land fraction
-
standard_name:
land_area_fraction
-
coordinates:
lon lat
-
description:
land fraction over the FOV
-
AIRS_name:
landFrac
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
referenceInformation
-
cell_methods:
area: mean (beam-weighted)
surf_alt[
atrack=
0
..44]
[
xtrack=
0
..29]
[
fov=
0
..8]
(Type is Float32)
-
attributes
-
units:
m
-
ancillary_variables:
surf_alt_sdev
-
valid_range:
-500.000000, 10000.0000
-
long_name:
surface altitude
-
standard_name:
surface_altitude
-
coordinates:
lon lat
-
description:
mean surface altitude wrt earth model over the FOV
-
AIRS_name:
topog
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
referenceInformation
-
cell_methods:
area: mean (beam-weighted)
surf_alt_sdev[
atrack=
0
..44]
[
xtrack=
0
..29]
[
fov=
0
..8]
(Type is Float32)
-
attributes
-
units:
m
-
valid_range:
0.00000000, 10000.0000
-
long_name:
surface altitude standard deviation
-
coordinates:
lon lat
-
description:
standard deviation of surface altitude within the FOV
-
AIRS_name:
topog_err
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
qualityInformation
-
cell_methods:
area: standard_deviation (beam-weighted)
sun_glint_lat[
atrack=
0
..44]
(Type is Float32)
-
attributes
-
units:
degrees_north
-
valid_range:
-90.0000000, 90.0000000
-
long_name:
sun glint latitude
-
standard_name:
latitude
-
coordinates:
subsat_lon subsat_lat
-
description:
sun glint spot latitude at scan_mid_time. Fill for night observations.
-
AIRS_name:
glintlat
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
referenceInformation
sun_glint_lon[
atrack=
0
..44]
(Type is Float32)
-
attributes
-
units:
degrees_east
-
valid_range:
-180.000000, 180.000000
-
long_name:
sun glint longitude
-
standard_name:
longitude
-
coordinates:
subsat_lon subsat_lat
-
description:
sun glint spot longitude at scan_mid_time. Fill for night observations.
-
AIRS_name:
glintlon
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
referenceInformation
sol_zen[
atrack=
0
..44]
[
xtrack=
0
..29]
[
fov=
0
..8]
(Type is Float32)
-
attributes
-
units:
degree
-
valid_range:
0.00000000, 180.000000
-
long_name:
solar zenith angle
-
standard_name:
solar_zenith_angle
-
coordinates:
lon lat
-
description:
solar zenith angle at the center of the FOV
-
AIRS_name:
solzen
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
referenceInformation
sol_azi[
atrack=
0
..44]
[
xtrack=
0
..29]
[
fov=
0
..8]
(Type is Float32)
-
attributes
-
units:
degree
-
valid_range:
0.00000000, 360.000000
-
long_name:
solar azimuth angle
-
standard_name:
solar_azimuth_angle
-
coordinates:
lon lat
-
description:
solar azimuth angle at the center of the FOV (clockwise from North)
-
AIRS_name:
solazi
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
referenceInformation
sun_glint_dist[
atrack=
0
..44]
[
xtrack=
0
..29]
[
fov=
0
..8]
(Type is Float32)
-
attributes
-
units:
m
-
valid_range:
0.00000000, 30000000.0
-
long_name:
sun glint distance
-
coordinates:
lon lat
-
description:
distance of sun glint spot to the center of the FOV
-
AIRS_name:
sun_glint_distance
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
referenceInformation
view_ang[
atrack=
0
..44]
[
xtrack=
0
..29]
[
fov=
0
..8]
(Type is Float32)
-
attributes
-
units:
degree
-
valid_range:
0.00000000, 180.000000
-
long_name:
view angle
-
standard_name:
sensor_view_angle
-
coordinates:
lon lat
-
description:
off nadir pointing angle
-
AIRS_name:
scanang
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
referenceInformation
sat_zen[
atrack=
0
..44]
[
xtrack=
0
..29]
[
fov=
0
..8]
(Type is Float32)
-
attributes
-
units:
degree
-
valid_range:
0.00000000, 180.000000
-
long_name:
satellite zenith angle
-
standard_name:
sensor_zenith_angle
-
coordinates:
lon lat
-
description:
satellite zenith angle at the center of the FOV
-
AIRS_name:
satzen
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
referenceInformation
sat_azi[
atrack=
0
..44]
[
xtrack=
0
..29]
[
fov=
0
..8]
(Type is Float32)
-
attributes
-
units:
degree
-
valid_range:
0.00000000, 360.000000
-
long_name:
satellite azimuth angle
-
standard_name:
sensor_azimuth_angle
-
coordinates:
lon lat
-
description:
satellite azimuth angle at the center of the FOV (clockwise from North)
-
AIRS_name:
satazi
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
referenceInformation
sat_range[
atrack=
0
..44]
[
xtrack=
0
..29]
[
fov=
0
..8]
(Type is Float32)
-
attributes
-
units:
m
-
valid_range:
100000.000, 10000000.0
-
long_name:
satellite range
-
coordinates:
lon lat
-
description:
line of sight distance between satellite and FOV center
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
referenceInformation
asc_flag[
atrack=
0
..44]
(Type is Byte)
-
attributes
-
valid_range:
0, 1
-
long_name:
ascending orbit flag
-
coordinates:
subsat_lon subsat_lat
-
description:
ascending orbit flag: 1 if ascending, 0 descending
-
AIRS_name:
scan_node_type
-
_FillValue:
255
-
coverage_content_type:
referenceInformation
-
flag_meanings:
descending ascending
-
flag_values:
0, 1
subsat_lat[
atrack=
0
..44]
(Type is Float32)
-
attributes
-
units:
degrees_north
-
valid_range:
-90.0000000, 90.0000000
-
long_name:
sub-satellite latitude
-
standard_name:
latitude
-
description:
sub-satellite latitude at scan_mid_time
-
AIRS_name:
sat_lat
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
referenceInformation
subsat_lon[
atrack=
0
..44]
(Type is Float32)
-
attributes
-
units:
degrees_east
-
valid_range:
-180.000000, 180.000000
-
long_name:
sub-satellite longitude
-
standard_name:
longitude
-
description:
sub-satellite longitude at scan_mid_time
-
AIRS_name:
sat_lon
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
referenceInformation
scan_mid_time[
atrack=
0
..44]
(Type is Float64)
-
attributes
-
units:
seconds since 1993-01-01 00:00
-
valid_range:
-2934835217.000000, 3376598410.000000
-
long_name:
midscan TAI93
-
standard_name:
time
-
coordinates:
subsat_lon subsat_lat
-
description:
TAI93 at middle of earth scene scans
-
AIRS_name:
nadirTAI
-
_FillValue:
9.969209968386869e+36
-
coverage_content_type:
referenceInformation
sat_alt[
atrack=
0
..44]
(Type is Float32)
-
attributes
-
units:
m
-
valid_range:
100000.000, 1000000.00
-
long_name:
satellite altitude
-
standard_name:
altitude
-
coordinates:
subsat_lon subsat_lat
-
description:
satellite altitude with respect to earth model at scan_mid_time
-
AIRS_name:
satheight
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
referenceInformation
sat_pos[
atrack=
0
..44]
[
spatial=
0
..2]
(Type is Float32)
-
attributes
-
units:
m
-
long_name:
satellite position
-
coordinates:
subsat_lon subsat_lat spatial_lbl
-
description:
satellite ECR position at scan_mid_time
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
referenceInformation
sat_vel[
atrack=
0
..44]
[
spatial=
0
..2]
(Type is Float32)
-
attributes
-
units:
m s-1
-
long_name:
satellite velocity
-
coordinates:
subsat_lon subsat_lat spatial_lbl
-
description:
satellite ECR velocity at scan_mid_time
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
referenceInformation
sat_att[
atrack=
0
..44]
[
attitude=
0
..2]
(Type is Float32)
-
attributes
-
units:
degree
-
valid_range:
-180.000000, 180.000000
-
long_name:
satellite attitude
-
coordinates:
subsat_lon subsat_lat angular_lbl
-
description:
satellite attitude at scan_mid_time. An orthogonal triad. First element is angle about the +x (roll) ORB axis. +x axis is positively oriented in the direction of orbital flight. Second element is angle about +y (pitch) ORB axis. +y axis is oriented normal to the orbit plane with the positive sense opposite to that of the orbit's angular momentum vector H. Third element is angle about +z (yaw) axis. +z axis is positively oriented Earthward parallel to the satellite radius vector R from the spacecraft center of mass to the center of the Earth.
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
referenceInformation
local_solar_time[
atrack=
0
..44]
[
xtrack=
0
..29]
[
fov=
0
..8]
(Type is Float32)
-
attributes
-
units:
hours
-
valid_range:
0.00000000, 24.0000000
-
long_name:
local apparent solar time
-
coordinates:
lon lat
-
description:
local apparent solar time in hours from midnight
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
referenceInformation
mean_anom_wrt_equat[
atrack=
0
..44]
(Type is Float32)
-
attributes
-
units:
degree
-
valid_range:
0.00000000, 360.000000
-
long_name:
mean anomaly with respect to the equator
-
coordinates:
subsat_lon subsat_lat
-
description:
spacecraft mean anomaly measured with respect to the ascending node
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
referenceInformation
sat_sol_zen[
atrack=
0
..44]
(Type is Float32)
-
attributes
-
units:
degree
-
valid_range:
0.00000000, 180.000000
-
long_name:
satellite solar zenith
-
coordinates:
subsat_lon subsat_lat
-
description:
solar zenith angle at the satellite
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
referenceInformation
sat_sol_azi[
atrack=
0
..44]
(Type is Float32)
-
attributes
-
units:
degree
-
valid_range:
0.00000000, 360.000000
-
long_name:
satellite solar azimuth
-
coordinates:
subsat_lon subsat_lat
-
description:
solar azimuth angle at the satellite (clockwise from North)
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
referenceInformation
asc_node_lon(Type is Float32)
-
attributes
-
units:
degrees_east
-
valid_range:
-180.000000, 180.000000
-
long_name:
ascending node
-
description:
Longitude of the last ascending node of spacecraft orbit before time_coverage_end.
-
AIRS_name:
eq_x_longitude
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
referenceInformation
asc_node_tai93(Type is Float64)
-
attributes
-
units:
seconds since 1993-01-01 00:00
-
valid_range:
-2934835217.000000, 3376598410.000000
-
long_name:
ascending node time
-
description:
TAI93 time of the last ascending node of spacecraft orbit before time_coverage_end.
-
AIRS_name:
eq_x_tai
-
_FillValue:
9.969209968386869e+36
-
coverage_content_type:
referenceInformation
asc_node_local_solar_time(Type is Float32)
-
attributes
-
units:
hours
-
valid_range:
0.00000000, 24.0000000
-
long_name:
local apparent solar time at the ascending node
-
description:
local apparent solar time at the last ascending node before time_coverage_end in hours from midnight
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
referenceInformation
solar_beta_angle(Type is Float32)
-
attributes
-
units:
degree
-
valid_range:
-90.0000000, 90.0000000
-
long_name:
beta angle
-
description:
Beta angle for the spacecraft orbit, determining the percentage of the orbit that the spacecraft is in direct sunlight.
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
referenceInformation
attitude_lbl[
attitude=
0
..2]
(Type is String)
-
attributes
-
long_name:
rotational direction
-
description:
list of rotational directions (roll, pitch, yaw)
-
coverage_content_type:
auxiliaryInformation
spatial_lbl[
spatial=
0
..2]
(Type is String)
-
attributes
-
long_name:
spatial direction
-
description:
list of spatial directions (X, Y, Z)
-
coverage_content_type:
auxiliaryInformation
utc_tuple_lbl[
utc_tuple=
0
..7]
(Type is String)
-
attributes
-
long_name:
UTC date/time parts
-
description:
names of the elements of UTC when it is expressed as an array of integers year,month,day,hour,minute,second,millisecond,microsecond
-
coverage_content_type:
auxiliaryInformation
nh3_tot[
atrack=
0
..44]
[
xtrack=
0
..29]
[
fov=
0
..8]
(Type is Float32)
-
attributes
-
ancillary_variables:
nh3_tot_qc nh3_tot_err
-
long_name:
total ammonia
-
coordinates:
lon lat
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
physicalMeasurement
-
standard_name:
atmosphere_mass_content_of_ammonia
-
units:
kg m-2
-
description:
Total column ammonia
-
cell_methods:
area: mean
nh3_tot_qc[
atrack=
0
..44]
[
xtrack=
0
..29]
[
fov=
0
..8]
(Type is Int16)
-
attributes
-
valid_range:
0, 2
-
long_name:
nh3_tot QC
-
coordinates:
lon lat
-
_FillValue:
-127
-
flag_values:
0, 1, 2
-
coverage_content_type:
qualityInformation
-
standard_name:
atmosphere_mass_content_of_ammonia status_flag
-
description:
nh3_tot QC flag
-
flag_meanings:
Best Good Do_Not_Use
nh3_tot_err[
atrack=
0
..44]
[
xtrack=
0
..29]
[
fov=
0
..8]
(Type is Float32)
-
attributes
-
long_name:
nh3_tot error estimate
-
coordinates:
lon lat
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
qualityInformation
-
standard_name:
atmosphere_mass_content_of_ammonia standard_error
-
units:
kg m-2
-
description:
nh3_tot error estimate
nh3_mmr[
atrack=
0
..44]
[
xtrack=
0
..29]
[
fov=
0
..8]
[
air_pres_nh3=
0
..20]
(Type is Float32)
-
attributes
-
ancillary_variables:
nh3_mmr_qc nh3_mmr_err
-
long_name:
ammonia MMR profile
-
coordinates:
lon lat
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
physicalMeasurement
-
standard_name:
mass_fraction_of_ammonia_in_air
-
units:
1
-
description:
ammonia mass mixing ratio to dry air
-
cell_methods:
area: mean
nh3_mmr_qc[
atrack=
0
..44]
[
xtrack=
0
..29]
[
fov=
0
..8]
[
air_pres_nh3=
0
..20]
(Type is Int16)
-
attributes
-
valid_range:
0, 2
-
long_name:
nh3_mmr QC
-
coordinates:
lon lat
-
_FillValue:
-127
-
flag_values:
0, 1, 2
-
coverage_content_type:
qualityInformation
-
standard_name:
mass_fraction_of_ammonia_in_air status_flag
-
description:
nh3_mmr QC flag
-
flag_meanings:
Best Good Do_Not_Use
nh3_mmr_err[
atrack=
0
..44]
[
xtrack=
0
..29]
[
fov=
0
..8]
[
air_pres_nh3=
0
..20]
(Type is Float32)
-
attributes
-
long_name:
nh3_mmr error estimate
-
coordinates:
lon lat
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
qualityInformation
-
standard_name:
mass_fraction_of_ammonia_in_air standard_error
-
units:
1
-
description:
nh3_mmr error estimate
surf_nh3_mmr[
atrack=
0
..44]
[
xtrack=
0
..29]
[
fov=
0
..8]
(Type is Float32)
-
attributes
-
ancillary_variables:
surf_nh3_mmr_qc surf_nh3_mmr_err
-
long_name:
near-surface ammonia MMR
-
coordinates:
lon lat
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
physicalMeasurement
-
standard_name:
mass_fraction_of_ammonia_in_air
-
units:
1
-
description:
near-surface ammonia mass mixing ratio to dry air (~2 meters above surface)
-
cell_methods:
area: mean
surf_nh3_mmr_qc[
atrack=
0
..44]
[
xtrack=
0
..29]
[
fov=
0
..8]
(Type is Int16)
-
attributes
-
valid_range:
0, 2
-
long_name:
surf_nh3_mmr QC
-
coordinates:
lon lat
-
_FillValue:
-127
-
flag_values:
0, 1, 2
-
coverage_content_type:
qualityInformation
-
standard_name:
mass_fraction_of_ammonia_in_air status_flag
-
description:
surf_nh3_mmr QC flag
-
flag_meanings:
Best Good Do_Not_Use
surf_nh3_mmr_err[
atrack=
0
..44]
[
xtrack=
0
..29]
[
fov=
0
..8]
(Type is Float32)
-
attributes
-
long_name:
surf_nh3_mmr error estimate
-
coordinates:
lon lat
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
qualityInformation
-
standard_name:
mass_fraction_of_ammonia_in_air standard_error
-
units:
1
-
description:
surf_nh3_mmr error estimate
nh3_dof[
atrack=
0
..44]
[
xtrack=
0
..29]
[
fov=
0
..8]
(Type is Float32)
-
attributes
-
valid_range:
0.00000000, 10000.0000
-
long_name:
ammonia profile DOFs
-
coordinates:
lon lat
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
qualityInformation
-
units:
1
-
description:
The trace of the averaging kernel matrix as a measure of the number of pieces of information about the ammonia profile provided by the physical retrieval step.
air_pres_nh3_nsurf[
atrack=
0
..44]
[
xtrack=
0
..29]
[
fov=
0
..8]
(Type is Int16)
-
attributes
-
valid_range:
1, 21
-
long_name:
surface level
-
coordinates:
lon lat
-
_FillValue:
-32767
-
coverage_content_type:
modelResult
-
standard_name:
model_level_number
-
units:
1
-
description:
Index in air_pres_nh3 of the level at the surface. Values at levels beyond this are invalid, representing data below the Earth's surface.
air_pres_nh3[
air_pres_nh3=
0
..20]
(Type is Float32)
-
attributes
-
valid_range:
0.00000000, 120000.000
-
long_name:
NH3 pressure levels
-
_FillValue:
9.96920997e+36
-
coverage_content_type:
coordinate
-
standard_name:
air_pressure
-
axis:
Z
-
units:
Pa
-
description:
NH3 pressure levels
