LSTzoom Metadata

This page describes the metadata file used for L2A products.

Key	Content Type	Description
product_id	string	The name of this product
platform	string	The name of the spacecraft (e.g. SBA01)
product_type	string	"L2"
product_name	string	"LSTzoom"
processing_scenario	string	"NRT" or "RPR"
acquisition_id	string	Location and time of acquisition
acquisition_datetime	string	Date and time of the acquisition, ISO 8601 format at UTC time
processing_time	string	ISO-8601 string indicating start time of imagery processing
parent_product_key	string
link	string	URL with complementary documentation and data access info
source	string	"constellr"
use_limitations	string	NA
atmospheric_data_source	string	"ERA5" or "CAMS_forecast"
elevation_data_source	string	DEM used for geometric/topographic correction (usually "COPERNICUS GLO30")
aerosol_model	string	"RURAL"
earth_sun_distance	float	Earth–Sun distance for irradiance correction factors
thick_cloud_percentage	float	Percentage of pixels covered by thick clouds
thin_cloud_percentage	float	Percentage of pixels covered by thin clouds
cloud_shadow_percentage	float	Percentage of pixels affected by cloud shadows
scl_masks_bands	object
cloud_mask_classes	dict	Possible values of cloud mask: 0 = clear; 1 = thick; 2 = thin; 3 = shadow
castshadow_mask_classes	dict	Possible values of cast-shadow mask: 0 = clear; 1 = castshadow
landwater_mask_classes	dict	Possible values of land/water mask: 0 = land; 1 = water
static_landwater_mask_classes	dict	Possible values of land/water mask: 0 = land; 1 = water
qa_masks_bands	object
blackfill_mask_classes	dict	Possible values of blackfill mask: 0 = valid data; 1 = no data
saturated_mask_classes	dict	Possible values of saturated mask: 0 = valid data; 1 = saturated
untested_mask_classes	dict	Possible values of untested mask: 0 = valid data; 1 = untested
sensors	object
acquisition_starttime	string	ISO-8601 start time of imagery acquisition
acquisition_endtime	string	ISO-8601 end time of imagery acquisition
bbox	number array	Bounding box in Lon/Lat (WGS84), RFC 7946 format
geometry	object
type	string	Polygon
coordinates	number array	Default GeoJSON footprint geometry
crs	string	Coordinate reference system
viewing_angles	object
azimuth_mean	float	Mean viewing azimuth angle [deg]
zenith_mean	float	Mean viewing zenith angle [deg]
solar_angles	object
azimuth_mean	float	Mean solar azimuth angle [deg]
zenith_mean	float	Mean solar zenith angle [deg]
surface_altitude_median	float	Mean surface elevation (m)
sensor	object	"VNIR" or "TIR"
sensor_id	string array	List of sensor identifiers
record_id	string array	List of record IDs forming the product
bands	dict of objects
name	string	Name of band
eo:common_name	string	STAC-compliant band name
band_centre	float	Wavelength of band centre
band_width	float	Width of the band
band_wavelength_unit	string	"µm"
resolutions	number array	Spatial resolution for this band
resolution_unit	string	"m"
dimensions	integer array	Rows and columns of the image
esun	object
value	float	Reference irradiance, uncorrected for Earth–Sun distance
unit	string	W/m²/µm
saturated_percentage	float	Percentage of saturated pixels
nodata_percentage	float	Percentage of nodata pixels
nottested_percentage	float	Percentage of unverified quality pixels
products	object
VNIR	object
sensor_id	string array	List of sensor identifiers
TCO3	float	Total ozone column (DU)
TCO3_unit	string	"Dobson Unit"
TCO3_source	string	"CAMS_fc" / "ERA5"
AOT	object
AOT_median	float	Median AOT value used to retrieve SRs
AOT_unit	string	"1"
AOT_source	string	Source ("constellr_DDV" or "CAMS_fc")
DDV_percentage	float	% of DDV(S) pixels (NA if source is "CAMS_fc")
AOT_file_id	string	Filename of L2A AOT product (NA if "CAMS_fc")
AOT_type	string	"uint16"; NA if "CAMS_fc"
AOT_offset	float	Offset to compute AOT from readings (AOT = DN × scale_factor + offset)
AOT_scale_factor	float	Scale factor to compute AOT from readings (AOT = DN × scale_factor + offset)
AOT_nodata	integer	Fill value
AOT_format	string	"COG"; NA if "CAMS_fc"
topographic_correction	bool	Topographic correction applied?
adjacency_correction	bool	Adjacency correction applied?
TCWV	object
TCWV_median	float	Median TCWV used to retrieve SRs
TCWV_unit	string	"g/cm²"
TCWV_source	string	Source ("constellr"/"ERA5"/"CAMS_fc")
TCWV_file_id	string	Filename (NA if "ERA5" or "CAMS_fc")
TCWV_type	string	"uint16"; NA if "ERA5" or "CAMS_fc"
TCWV_offset	float	Offset to compute TCWV from readings (tcwv = DN × scale_factor + offset)
TCWV_scale_factor	float	Scale factor for TCWV from readings (tcwv = DN × scale_factor + offset); NA if "ERA5" or "CAMS_fc"
TCWV_nodata	integer	Fill value
TCWV_format	string	"COG"; NA if "ERA5" or "CAMS_fc"
topographic_correction	bool	Topographic correction applied?
adjacency_correction	bool	Adjacency correction applied?
SR	object
topographic_correction	bool	Topographic correction applied?
adjacency_correction	bool	Adjacency correction applied?
SR_unit	string	"1"
SR_type	string	"uint16"
SR_offset	float	Offset to compute SR from readings (SR = DN × scale_factor + offset)
SR_scale_factor	float	Scale factor to compute SR from readings (SR = DN × scale_factor + offset)
SR_nodata	integer	Fill value
SR_format	string	"COG"
Bands	object
eo:common_name	string	STAC-compliant band name
clipped_pixels	integer	Number of SR pixels clipped to 0 or 1
TIR	object
sensor_id	string array	List of sensor identifiers
TCO3	float	Total ozone column (DU)
TCO3_unit	string	"Dobson Unit"
TCO3_source	string	"CAMS_fc" / "ERA5"
AOT_median	float	Median AOT used to retrieve LSTs
AOT_unit	string	"1"
AOT_source	string	"Fixed"/"constellr_DDV"/"CAMS_fc"
AOT_file_id	string	Filename of L2A AOT product (NA if "CAMS_fc")
TCWV_median	float	Median TCWV used to retrieve LSTs
TCWV_unit	string	"g/cm²"
TCWV_source	string	"constellr"/"CAMS_fc"/"ERA5"
TCWV_file_id	string	Filename of L2A TCWV product (NA if "ERA5" or "CAMS_fc")
ST	object
ST_type	string	"uint16"
ST_offset	float	Offset to compute ST from readings (st = DN × scale_factor + offset)
ST_scale_factor	float	Scale factor to compute ST from readings (st = DN × scale_factor + offset)
ST_unit	string	"K"
ST_nodata	integer	Fill in value
ST_format	string	"COG"

Last update: September, 2025

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