USGS Landsat 9 Collection 2 Tier 1 TOA Reflectance

Dataset Availability

2021-10-31T00:00:00Z–2024-11-24T06:37:03Z

Dataset Provider

USGS/Google

Earth Engine Snippet

ee.ImageCollection("LANDSAT/LC09/C02/T1_TOA")

Tags

c2 global landsat toa usgs

Description

Landsat 9 Collection 2 Tier 1 calibrated top-of-atmosphere (TOA) reflectance. Calibration coefficients are extracted from the image metadata. See Chander et al. (2009) for details on the TOA computation.

Landsat scenes with the highest available data quality are placed into Tier 1 and are considered suitable for time-series processing analysis. Tier 1 includes Level-1 Precision Terrain (L1TP) processed data that have well-characterized radiometry and are inter-calibrated across the different Landsat sensors. The georegistration of Tier 1 scenes will be consistent and within prescribed tolerances [<=12 m root mean square error (RMSE)]. All Tier 1 Landsat data can be considered consistent and inter-calibrated (regardless of sensor) across the full collection. See more information in the USGS docs.

The T1_RT collection contains both Tier 1 and Real-Time (RT) assets. Newly-acquired Landsat 7 ETM+ and Landsat 8 OLI/TIRS data are processed upon downlink but use predicted ephemeris, initial bumper mode parameters, or initial TIRS line of sight model parameters. The data is placed in the Real-Time tier and made available for immediate download. Once the data have been reprocessed with definitive ephemeris, updated bumper mode parameters and refined TIRS parameters, the products are transitioned to either Tier 1 or Tier 2 and removed from the Real-Time tier. The transition delay from Real-Time to Tier 1 or Tier 2 is between 14 and 26 days.

Bands

Bands

Name	Pixel Size	Wavelength	Description
B1	30 meters	0.43 - 0.45 μm	Coastal aerosol
B2	30 meters	0.45 - 0.51 μm	Blue
B3	30 meters	0.53 - 0.59 μm	Green
B4	30 meters	0.64 - 0.67 μm	Red
B5	30 meters	0.85 - 0.88 μm	Near infrared
B6	30 meters	1.57 - 1.65 μm	Shortwave infrared 1
B7	30 meters	2.11 - 2.29 μm	Shortwave infrared 2
B8	15 meters	0.52 - 0.90 μm	Band 8 Panchromatic
B9	30 meters	1.36 - 1.38 μm	Cirrus
B10	30 meters	10.60 - 11.19 μm	Thermal infrared 1, resampled from 100m to 30m
B11	30 meters	11.50 - 12.51 μm	Thermal infrared 2, resampled from 100m to 30m
QA_PIXEL	30 meters		Landsat Collection 2 OLI/TIRS QA Bitmask
Bitmask for QA_PIXEL Bit 0: Fill 0: Image data 1: Fill data Bit 1: Dilated Cloud 0: Cloud is not dilated or no cloud 1: Cloud dilation Bit 2: Cirrus 0: Cirrus Confidence: no confidence level set or Low Confidence 1: High confidence cirrus Bit 3: Cloud 0: Cloud confidence is not high 1: High confidence cloud Bit 4: Cloud Shadow 0: Cloud Shadow Confidence is not high 1: High confidence cloud shadow Bit 5: Snow 0: Snow/Ice Confidence is not high 1: High confidence snow cover Bit 6: Clear 0: Cloud or Dilated Cloud bits are set 1: Cloud and Dilated Cloud bits are not set Bit 7: Water 0: Land or cloud 1: Water Bits 8-9: Cloud Confidence 0: No confidence level set 1: Low confidence 2: Medium confidence 3: High confidence Bits 10-11: Cloud Shadow Confidence 0: No confidence level set 1: Low confidence 2: Reserved 3: High confidence Bits 12-13: Snow / Ice Confidence 0: No confidence level set 1: Low confidence 2: Reserved 3: High confidence Bits 14-15: Cirrus Confidence 0: No confidence level set 1: Low confidence 2: Reserved 3: High confidence
QA_RADSAT	30 meters		Radiometric saturation QA
Bitmask for QA_RADSAT Bit 0: Band 1 data saturated Bit 1: Band 2 data saturated Bit 2: Band 3 data saturated Bit 3: Band 4 data saturated Bit 4: Band 5 data saturated Bit 5: Band 6 data saturated Bit 6: Band 7 data saturated Bit 7: Unused Bit 8: Band 9 data saturated Bits 9-10: Unused Bit 11: Terrian occlusion 0: No terrain occlusion 1: Terrain occlusion
SAA	30 meters		Solar Azimuth Angle
SZA	30 meters		Solar Zenith Angle
VAA	30 meters		View Azimuth Angle
VZA	30 meters		View Zenith Angle

Image Properties

Image Properties

Name	Type	Description
CLOUD_COVER	DOUBLE	Percentage cloud cover (0-100), -1 = not calculated.
CLOUD_COVER_LAND	DOUBLE	Percentage cloud cover over land (0-100), -1 = not calculated.
COLLECTION_CATEGORY	STRING	Tier of scene. (T1 or T2)
COLLECTION_NUMBER	DOUBLE	Number of collection.
DATA_SOURCE_ELEVATION	STRING	Indicates the source of the DEM used in the correction process. Possible values: "GLS2000", "RAMP", "GTOPO30".'
DATA_SOURCE_TIRS_STRAY_LIGHT_CORRECTION	STRING	The correction source used in creating the Landsat 8 TIRS stray light correction image. This field is not included for Landsat 9.
DATE_ACQUIRED	STRING	Image acquisition date. "YYYY-MM-DD"
DATE_PRODUCT_GENERATED	INT	Product generation epoch.
DATUM	STRING	Datum used in image creation.
EARTH_SUN_DISTANCE	DOUBLE	Earth sun distance in astronomical units (AU).
ELLIPSOID	STRING	Ellipsoid used in image creation.
GEOMETRIC_RMSE_MODEL	DOUBLE	Combined Root Mean Square Error (RMSE) of the geometric residuals (meters) in both across-track and along-track directions measured on the GCPs used in geometric precision correction. Not present in L1G products.
GEOMETRIC_RMSE_MODEL_X	DOUBLE	RMSE of the X direction geometric residuals (in meters) measured on the GCPs used in geometric precision correction. Not present in L1G products.
GEOMETRIC_RMSE_MODEL_Y	DOUBLE	RMSE of the Y direction geometric residuals (in meters) measured on the GCPs used in geometric precision correction. Not present in L1G products.
GRID_CELL_SIZE_PANCHROMATIC	DOUBLE	Grid cell size used in creating the image for the panchromatic band.
GRID_CELL_SIZE_REFLECTIVE	DOUBLE	Grid cell size used in creating the image for the reflective band.
GRID_CELL_SIZE_THERMAL	DOUBLE	Grid cell size used in creating the image for the thermal band.
GROUND_CONTROL_POINTS_MODEL	DOUBLE	The number of ground control points used. Not used in L1GT products. Values: 0 - 999 (0 is used for L1T products that have used Multi-scene refinement).
GROUND_CONTROL_POINTS_VERSION	DOUBLE	The number of ground control points used in the verification of the terrain corrected product. Values: -1 to 1615 (-1 = not available)
IMAGE_QUALITY_OLI	DOUBLE	The composite image quality for the OLI bands. Values: 9 = Best. 1 = Worst. 0 = Image quality not calculated. This parameter is only present if OLI bands are present in the product.
IMAGE_QUALITY_TIRS	DOUBLE	The composite image quality for the TIRS bands. Values: 9 = Best. 1 = Worst. 0 = Image quality not calculated. This parameter is only present if OLI bands are present in the product.
K1_CONSTANT_BAND_10	DOUBLE	Calibration K1 constant for Band 10 radiance to temperature conversion.
K1_CONSTANT_BAND_11	DOUBLE	Calibration K1 constant for Band 11 radiance to temperature conversion.
K2_CONSTANT_BAND_10	DOUBLE	Calibration K2 constant for Band 10 radiance to temperature conversion.
K2_CONSTANT_BAND_11	DOUBLE	Calibration K2 constant for Band 11 radiance to temperature conversion.
LANDSAT_PRODUCT_ID	STRING	The naming convention of each Landsat Collection N Level-1 image based on acquisition parameters and processing parameters. Format: LXSS_LLLL_PPPRRR_YYYYMMDD_yyyymmdd_CC_TX L = Landsat X = Sensor (O = Operational Land Imager, T = Thermal Infrared Sensor, C = Combined OLI/TIRS) SS = Satellite (08 = Landsat 8) LLLL = Processing Correction Level (L1TP = precision and terrain, L1GT = systematic terrain, L1GS = systematic) PPP = WRS Path RRR = WRS Row YYYYMMDD = Acquisition Date expressed in Year, Month, Day yyyymmdd = Processing Date expressed in Year, Month, Day CC = Collection Number (02) TX = Collection Category (RT = Real Time, T1 = Tier 1, T2 = Tier 2)
LANDSAT_SCENE_ID	STRING	The Pre-Collection naming convention of each image is based on acquisition parameters. This was the naming convention used prior to Collection 1. Format: LXSPPPRRRYYYYDDDGSIVV L = Landsat X = Sensor (O = Operational Land Imager, T = Thermal Infrared Sensor, C = Combined OLI/TIRS) S = Satellite (08 = Landsat 8) PPP = WRS Path RRR = WRS Row YYYY = Year of Acquisition DDD = Julian Day of Acquisition GSI = Ground Station Identifier VV = Version
MAP_PROJECTION	STRING	Projection used to represent the 3-dimensional surface of the earth for the Level-1 product.
NADIR_OFFNADIR	STRING	Nadir or Off-Nadir condition of the scene.
ORIENTATION	STRING	Orientation used in creating the image. Values: NOMINAL = Nominal Path, NORTH_UP = North Up, TRUE_NORTH = True North, USER = User
PANCHROMATIC_LINES	DOUBLE	Number of product lines for the panchromatic band.
PANCHROMATIC_SAMPLES	DOUBLE	Number of product samples for the panchromatic bands.
PROCESSING_SOFTWARE_VERSION	STRING	Name and version of the processing software used to generate the L1 product.
RADIANCE_ADD_BAND_1	DOUBLE	Additive rescaling factor used to convert calibrated DN to radiance for Band 1.
RADIANCE_ADD_BAND_10	DOUBLE	Additive rescaling factor used to convert calibrated DN to radiance for Band 10.
RADIANCE_ADD_BAND_11	DOUBLE	Additive rescaling factor used to convert calibrated DN to radiance for Band 11.
RADIANCE_ADD_BAND_2	DOUBLE	Additive rescaling factor used to convert calibrated DN to radiance for Band 2.
RADIANCE_ADD_BAND_3	DOUBLE	Additive rescaling factor used to convert calibrated DN to radiance for Band 3.
RADIANCE_ADD_BAND_4	DOUBLE	Additive rescaling factor used to convert calibrated DN to radiance for Band 4.
RADIANCE_ADD_BAND_5	DOUBLE	Additive rescaling factor used to convert calibrated DN to radiance for Band 5.
RADIANCE_ADD_BAND_6	DOUBLE	Additive rescaling factor used to convert calibrated DN to radiance for Band 6.
RADIANCE_ADD_BAND_7	DOUBLE	Additive rescaling factor used to convert calibrated DN to radiance for Band 7.
RADIANCE_ADD_BAND_8	DOUBLE	Additive rescaling factor used to convert calibrated DN to radiance for Band 8.
RADIANCE_ADD_BAND_9	DOUBLE	Additive rescaling factor used to convert calibrated DN to radiance for Band 9.
RADIANCE_MULT_BAND_1	DOUBLE	Multiplicative rescaling factor used to convert calibrated Band 1 DN to radiance.
RADIANCE_MULT_BAND_10	DOUBLE	Multiplicative rescaling factor used to convert calibrated Band 10 DN to radiance.
RADIANCE_MULT_BAND_11	DOUBLE	Multiplicative rescaling factor used to convert calibrated Band 11 DN to radiance.
RADIANCE_MULT_BAND_2	DOUBLE	Multiplicative rescaling factor used to convert calibrated Band 2 DN to radiance.
RADIANCE_MULT_BAND_3	DOUBLE	Multiplicative rescaling factor used to convert calibrated Band 3 DN to radiance.
RADIANCE_MULT_BAND_4	DOUBLE	Multiplicative rescaling factor used to convert calibrated Band 4 DN to radiance.
RADIANCE_MULT_BAND_5	DOUBLE	Multiplicative rescaling factor used to convert calibrated Band 5 DN to radiance.
RADIANCE_MULT_BAND_6	DOUBLE	Multiplicative rescaling factor used to convert calibrated Band 6 DN to radiance.
RADIANCE_MULT_BAND_7	DOUBLE	Multiplicative rescaling factor used to convert calibrated Band 7 DN to radiance.
RADIANCE_MULT_BAND_8	DOUBLE	Multiplicative rescaling factor used to convert calibrated Band 8 DN to radiance.
RADIANCE_MULT_BAND_9	DOUBLE	Multiplicative rescaling factor used to convert calibrated Band 9 DN to radiance.
REFLECTANCE_ADD_BAND_1	DOUBLE	Additive rescaling factor used to convert calibrated Band 1 DN to reflectance.
REFLECTANCE_ADD_BAND_2	DOUBLE	Additive rescaling factor used to convert calibrated Band 2 DN to reflectance.
REFLECTANCE_ADD_BAND_3	DOUBLE	Additive rescaling factor used to convert calibrated Band 3 DN to reflectance.
REFLECTANCE_ADD_BAND_4	DOUBLE	Additive rescaling factor used to convert calibrated Band 4 DN to reflectance.
REFLECTANCE_ADD_BAND_5	DOUBLE	Additive rescaling factor used to convert calibrated Band 5 DN to reflectance.
REFLECTANCE_ADD_BAND_7	DOUBLE	Multiplicative factor used to convert calibrated Band 7 DN to reflectance.
REFLECTANCE_ADD_BAND_8	DOUBLE	Multiplicative factor used to convert calibrated Band 8 DN to reflectance.
REFLECTANCE_ADD_BAND_9	DOUBLE	Minimum achievable spectral reflectance value for Band 8.
REFLECTANCE_MULT_BAND_1	DOUBLE	Multiplicative factor used to convert calibrated Band 1 DN to reflectance.
REFLECTANCE_MULT_BAND_2	DOUBLE	Multiplicative factor used to convert calibrated Band 2 DN to reflectance.
REFLECTANCE_MULT_BAND_3	DOUBLE	Multiplicative factor used to convert calibrated Band 3 DN to reflectance.
REFLECTANCE_MULT_BAND_4	DOUBLE	Multiplicative factor used to convert calibrated Band 4 DN to reflectance.
REFLECTANCE_MULT_BAND_5	DOUBLE	Multiplicative factor used to convert calibrated Band 5 DN to reflectance.
REFLECTANCE_MULT_BAND_6	DOUBLE	Multiplicative factor used to convert calibrated Band 6 DN to reflectance.
REFLECTANCE_MULT_BAND_7	DOUBLE	Multiplicative factor used to convert calibrated Band 7 DN to reflectance.
REFLECTANCE_MULT_BAND_8	DOUBLE	Multiplicative factor used to convert calibrated Band 8 DN to reflectance.
REFLECTANCE_MULT_BAND_9	DOUBLE	Multiplicative factor used to convert calibrated Band 9 DN to reflectance.
REFLECTIVE_LINES	DOUBLE	Number of product lines for the reflective bands.
REFLECTIVE_SAMPLES	DOUBLE	Number of product samples for the reflective bands.
REQUEST_ID	STRING	Request id, nnnyymmdd0000_0000 nnn = node number yy = year mm = month dd = day
RESAMPLING_OPTION	STRING	Resampling option used in creating the image.
ROLL_ANGLE	DOUBLE	The amount of spacecraft roll angle at the scene center.
SATURATION_BAND_1	STRING	Flag indicating saturated pixels for band 1 ('Y'/'N')
SATURATION_BAND_10	STRING	Flag indicating saturated pixels for band 10 ('Y'/'N')
SATURATION_BAND_11	STRING	Flag indicating saturated pixels for band 11 ('Y'/'N')
SATURATION_BAND_2	STRING	Flag indicating saturated pixels for band 2 ('Y'/'N')
SATURATION_BAND_3	STRING	Flag indicating saturated pixels for band 3 ('Y'/'N')
SATURATION_BAND_4	STRING	Flag indicating saturated pixels for band 4 ('Y'/'N')
SATURATION_BAND_5	STRING	Flag indicating saturated pixels for band 5 ('Y'/'N')
SATURATION_BAND_6	STRING	Flag indicating saturated pixels for band 6 ('Y'/'N')
SATURATION_BAND_7	STRING	Flag indicating saturated pixels for band 7 ('Y'/'N')
SATURATION_BAND_8	STRING	Flag indicating saturated pixels for band 8 ('Y'/'N')
SATURATION_BAND_9	STRING	Flag indicating saturated pixels for band 9 ('Y'/'N')
SCENE_CENTER_TIME	STRING	Scene center time of acquired image. HH:MM:SS.SSSSSSSZ HH = Hour (00-23) MM = Minutes SS.SSSSSSS = Fractional seconds Z = "Zulu" time (same as GMT)
SENSOR_ID	STRING	Sensor used to capture data.
SPACECRAFT_ID	STRING	Spacecraft identification.
STATION_ID	STRING	Ground Station/Organisation that received the data.
SUN_AZIMUTH	DOUBLE	Sun azimuth angle in degrees for the image center location at the image center acquisition time.
SUN_ELEVATION	DOUBLE	Sun elevation angle in degrees for the image center location at the image center acquisition time.
TARGET_WRS_PATH	DOUBLE	Nearest WRS-2 path to the line-of-sight scene center of the image.
TARGET_WRS_ROW	DOUBLE	Nearest WRS-2 row to the line-of-sight scene center of the image. Rows 880-889 and 990-999 are reserved for the polar regions where it is undefined in the WRS-2.
THERMAL_LINES	DOUBLE	Number of product lines for the thermal band.
THERMAL_SAMPLES	DOUBLE	Number of product samples for the thermal band.
TIRS_SSM_MODEL	STRING	Due to an anomalous condition on the Thermal Infrared Sensor (TIRS) Scene Select Mirror (SSM) encoder electronics, this field has been added to indicate which model was used to process the data. (Actual, Preliminary, Final)
TIRS_SSM_POSITION_STATUS	STRING	TIRS SSM position status.
TIRS_STRAY_LIGHT_CORRECTION_SOURCE	STRING	TIRS stray light correction source.
TRUNCATION_OLI	STRING	Region of OLCI truncated.
UTM_ZONE	DOUBLE	UTM zone number used in product map projection.
WRS_PATH	DOUBLE	The WRS orbital path number (001 - 251).
WRS_ROW	DOUBLE	Landsat satellite WRS row (001-248).
WRS_TYPE	DOUBLE	World Reference System (WRS) type used for the collection of this scene.

Terms of Use

Terms of Use

Landsat datasets are federally created data and therefore reside in the public domain and may be used, transferred, or reproduced without copyright restriction.

Acknowledgement or credit of the USGS as data source should be provided by including a line of text citation such as the example shown below.

(Product, Image, Photograph, or Dataset Name) courtesy of the U.S. Geological Survey

Example: Landsat-7 image courtesy of the U.S. Geological Survey

See the USGS Visual Identity System Guidance for further details on proper citation and acknowledgement of USGS products.

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Code Editor (JavaScript)

var dataset = ee.ImageCollection('LANDSAT/LC09/C02/T1_TOA')
  .filterDate('2022-01-01', '2022-02-01');
var trueColor432 = dataset.select(['B4', 'B3', 'B2']);
var trueColor432Vis = {
  min: 0.0,
  max: 0.4,
};
Map.setCenter(6.746, 46.529, 6);
Map.addLayer(trueColor432, trueColor432Vis, 'True Color (432)');

Open in Code Editor

USGS Landsat 9 Collection 2 Tier 1 TOA Reflectance

Landsat 9 Collection 2 Tier 1 calibrated top-of-atmosphere (TOA) reflectance. Calibration coefficients are extracted from the image metadata. See Chander et al. (2009) for details on the TOA computation. Landsat scenes with the highest available data quality are placed into Tier 1 and are considered suitable for time-series processing analysis. …

LANDSAT/LC09/C02/T1_TOA, c2,global,landsat,toa,usgs

2021-10-31T00:00:00Z/2024-11-24T06:37:03Z

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