- Dataset Availability
- 1999-05-28T01:02:17Z–2024-01-19T01:39:58.042000Z
- Dataset Provider
- USGS
- Revisit Interval
- 16 Days
- Tags
Description
Landsat 7 Collection 2 Tier 1 and Real-Time data DN values, representing scaled, calibrated at-sensor radiance.
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.
Note that Landsat 7's orbit has been drifting to an earlier acquisition time since 2017 .
Bands
Bands
B1
Blue
B2
Green
B3
Red
B4
Near infrared
B5
Shortwave infrared 1
B6_VCID_1
Low-gain Thermal Infrared 1. This band has expanded dynamic range and lower radiometric resolution (sensitivity), with less saturation at high Digital Number (DN) values. Resampled from 60m to 30m.
B6_VCID_2
High-gain Thermal Infrared 1. This band has higher radiometric resolution (sensitivity), although it has a more restricted dynamic range. Resampled from 60m to 30m.
B7
Shortwave infrared 2
B8
Panchromatic
QA_PIXEL
Landsat Collection 2 TM/ETM QA Bitmask
QA_RADSAT
Radiometric saturation QA
SAA
Solar Azimuth Angle
SZA
Solar Zenith Angle
VAA
View Azimuth Angle
VZA
View Zenith Angle
Image Properties
Image Properties
Percentage cloud cover (0-100), -1 = not calculated.
Percentage cloud cover over land (0-100), -1 = not calculated.
Tier of scene. (T1 or T2)
Number of collection.
Internal calibration bias method for band 1.
Internal calibration bias method for band 2.
Internal calibration bias method for band 3.
Internal calibration bias method for band 4.
Internal calibration bias method for band 5.
Internal calibration bias method for band 6_VICD_1.
Internal calibration bias method for band 6_VICD_2.
Internal calibration bias method for band 7.
Internal calibration bias method for band 8.
Internal calibration gain method for band 1.
Internal calibration gain method for band 2.
Internal calibration gain method for band 3.
Internal calibration gain method for band 4.
Internal calibration gain method for band 5.
Internal calibration gain method for band 6_VCID_1.
Internal calibration gain method for band 6_VCID_2.
Internal calibration gain method for band 7.
Internal calibration gain method for band 8.
Indicates the source of the DEM used in the correction process. Possible values: "GLS2000", "RAMP", "GTOPO30".'
Image acquisition date. "YYYY-MM-DD"
Product generation epoch.
Datum used in image creation.
Earth sun distance in astronomical units (AU).
Ellipsoid used in image creation.
Ephemeris data type used to perform geometric correction. (Definitive or Predictive)
Gain state for Band 1. (L = Low gain, H = High)
Gain state for Band 2. (L = Low gain, H = High)
Gain state for Band 3. (L = Low gain, H = High)
Gain state for Band 4. (L = Low gain, H = High)
Gain state for Band 5. (L = Low gain, H = High)
Gain state for Band 6 VCID_1. (L = Low gain, H = High)
Gain state for Band 6 VCID_2. (L = Low gain, H = High)
Gain state for Band 7. (L = Low gain, H = High)
Gain state for Band 8. (L = Low gain, H = High)
Presence and direction of gain change for Band 1 (LL = no change, HH = no change, LH = low to high, HL = high to low, U = Unknown).
Presence and direction of gain change for Band 2 (LL = no change, HH = no change, LH = low to high, HL = high to low, U = Unknown).
Presence and direction of gain change for Band 3 (LL = no change, HH = no change, LH = low to high, HL = high to low, U = Unknown).
Presence and direction of gain change for Band 4 (LL = no change, HH = no change, LH = low to high, HL = high to low, U = Unknown).
Presence and direction of gain change for Band 5 (LL = no change, HH = no change, LH = low to high, HL = high to low, U = Unknown).
Presence and direction of gain change for Band 6 VCID_1 (LL = no change, HH = no change, LH = low to high, HL = high to low, U = Unknown).
Presence and direction of gain change for Band 6 VCID_2 (LL = no change, HH = no change, LH = low to high, HL = high to low, U = Unknown).
Presence and direction of gain change for Band 7 (LL = no change, HH = no change, LH = low to high, HL = high to low, U = Unknown).
Presence and direction of gain change for Band 8 (LL = no change, HH = no change, LH = low to high, HL = high to low, U = Unknown).
Scan line number where the first change in Band 1 gain was detected.
Scan line number where the first change in Band 2 gain was detected.
Scan line number where the first change in Band 3 gain was detected.
Scan line number where the first change in Band 4 gain was detected.
Scan line number where the first change in Band 5 gain was detected.
Scan line number where the first change in Band 6 VCID 1 gain was detected.
Scan line number where the first change in Band 6 VCID 2 gain was detected.
Scan line number where the first change in Band 7 gain was detected.
Scan line number where the first change in Band 8 gain was detected.
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.
RMSE of the X direction geometric residuals (in meters) measured on the GCPs used in geometric precision correction. Not present in L1G products.
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 used in creating the image for the panchromatic band.
Grid cell size used in creating the image for the reflective band.
Grid cell size used in creating the image for the thermal band.
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).
The number of ground control points used in the verification of the terrain corrected product. Values: -1 to 1615 (-1 = not available)
Image quality, 0 = worst, 9 = best, -1 = quality not calculated
Calibration K1 constant for Band 6 VCID 1 radiance to temperature conversion.
Calibration K1 constant for Band 6 VCID 2 radiance to temperature conversion.
Calibration K2 constant for Band 6 VCID 1 radiance to temperature conversion.
Calibration K2 constant for Band 6 VCID 2 radiance to temperature conversion.
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)
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
Projection used to represent the 3-dimensional surface of the earth for the Level-1 product.
Orientation used in creating the image. Values: NOMINAL = Nominal Path, NORTH_UP = North Up, TRUE_NORTH = True North, USER = User
Number of product lines for the panchromatic band.
Number of product samples for the panchromatic bands.
One of L1GS, L1GT, or L1TP.
Name and version of the processing software used to generate the L1 product.
Additive rescaling factor used to convert calibrated DN to radiance for Band 1.
Additive rescaling factor used to convert calibrated DN to radiance for Band 2.
Additive rescaling factor used to convert calibrated DN to radiance for Band 3.
Additive rescaling factor used to convert calibrated DN to radiance for Band 4.
Additive rescaling factor used to convert calibrated DN to radiance for Band 5.
Additive rescaling factor used to convert calibrated DN to radiance for Band 6 VCID 1.
Additive rescaling factor used to convert calibrated DN to radiance for Band 6 VCID 2.
Additive rescaling factor used to convert calibrated DN to radiance for Band 7.
Additive rescaling factor used to convert calibrated DN to radiance for Band 8.
Multiplicative rescaling factor used to convert calibrated Band 1 DN to radiance.
Multiplicative rescaling factor used to convert calibrated Band 2 DN to radiance.
Multiplicative rescaling factor used to convert calibrated Band 3 DN to radiance.
Multiplicative rescaling factor used to convert calibrated Band 4 DN to radiance.
Multiplicative rescaling factor used to convert calibrated Band 5 DN to radiance.
Multiplicative rescaling factor used to convert calibrated Band 6 VCID 1 DN to radiance.
Multiplicative rescaling factor used to convert calibrated Band 6 VCID 2 DN to radiance.
Multiplicative rescaling factor used to convert calibrated Band 7 DN to radiance.
Multiplicative rescaling factor used to convert calibrated Band 8 DN to radiance.
Additive rescaling factor used to convert calibrated Band 1 DN to reflectance.
Additive rescaling factor used to convert calibrated Band 2 DN to reflectance.
Additive rescaling factor used to convert calibrated Band 3 DN to reflectance.
Additive rescaling factor used to convert calibrated Band 4 DN to reflectance.
Additive rescaling factor used to convert calibrated Band 5 DN to reflectance.
Additive rescaling factor used to convert calibrated Band 7 DN to reflectance.
Additive rescaling factor used to convert calibrated Band 8 DN to reflectance.
Multiplicative factor used to convert calibrated Band 1 DN to reflectance.
Multiplicative factor used to convert calibrated Band 2 DN to reflectance.
Multiplicative factor used to convert calibrated Band 3 DN to reflectance.
Multiplicative factor used to convert calibrated Band 4 DN to reflectance.
Multiplicative factor used to convert calibrated Band 5 DN to reflectance.
Multiplicative factor used to convert calibrated Band 7 DN to reflectance.
Multiplicative factor used to convert calibrated Band 8 DN to reflectance.
Number of product lines for the reflective bands.
Number of product samples for the reflective bands.
Request id, nnnyymmdd0000_0000
- nnn = node number
- yy = year
- mm = month
- dd = day
Resampling option used in creating the image.
Flag indicating saturated pixels for band 1 ('Y'/'N')
Flag indicating saturated pixels for band 2 ('Y'/'N')
Flag indicating saturated pixels for band 3 ('Y'/'N')
Flag indicating saturated pixels for band 4 ('Y'/'N')
Flag indicating saturated pixels for band 5 ('Y'/'N')
Flag indicating saturated pixels for band 6 VCID 1 ('Y'/'N')
Flag indicating saturated pixels for band 6 VCID 2 ('Y'/'N')
Flag indicating saturated pixels for band 7 ('Y'/'N')
Flag indicating saturated pixels for band 8 ('Y'/'N')
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)
Indicates if shutter intrusion is found within scene.
Sensor used to capture data.
Operational mode. Scan Angle Monitor (SAM) or BUMPER.
Indicates the Scan Line Corrector (SLC) was ON.
Spacecraft identification.
Ground Station/Organisation that received the data.
Sun azimuth angle in degrees for the image center location at the image center acquisition time.
Sun elevation angle in degrees for the image center location at the image center acquisition time.
Number of product lines for the thermal band.
Number of product samples for the thermal band.
UTM zone number used in product map projection.
The WRS orbital path number (001 - 251).
Landsat satellite WRS row (001-248).
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/LE07/C02/T1_RT' ) . filterDate ( '1999-01-01' , '2002-12-31' ); var trueColor321 = dataset . select ([ 'B3' , 'B2' , 'B1' ]); var trueColor321Vis = {}; Map . setCenter ( 6.746 , 46.529 , 6 ); Map . addLayer ( trueColor321 , trueColor321Vis , 'True Color (321)' );
