USGS Landsat 9 Collection 2 Tier 1 TOA Reflectance

LANDSAT/LC09/C02/T1_TOA
Dataset Availability
2021-10-31T00:00:00Z–2024-12-17T06:36:21Z
Dataset Provider
Earth Engine Snippet
ee.ImageCollection("LANDSAT/LC09/C02/T1_TOA")
Revisit Interval
16 Days
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
QA_RADSAT 30 meters

Radiometric saturation QA
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.

Explore with Earth Engine

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
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/2024-12-17T06:36:21Z
Google Earth Engine