Landsat 7 Collection 1 Tier 1 32-Day TOA Reflectance Composite

Dataset Availability: 1999-01-01T00:00:00Z–2021-12-19T00:00:00Z
Dataset Provider: Google
Earth Engine Snippet: ee.ImageCollection("LANDSAT/LE07/C01/T1_32DAY_TOA")
Tags: 32day landsat toa usgs

Description

These composites are created from all the scenes in each 32-day period beginning from the first day of the year and continuing to the 352nd day of the year. The last composite of the year, beginning on day 353, will overlap the first composite of the following year by 20 days. All the images from each 32-day period are included in the composite, with the most recent pixel as the composite value.

Bands

Bands

Name	Pixel Size	Wavelength	Description
`B1`	30 meters	0.45 - 0.52 μm	Blue
`B2`	30 meters	0.52 - 0.60 μm	Green
`B3`	30 meters	0.63 - 0.69 μm	Red
`B4`	30 meters	0.77 - 0.90 μm	Near infrared
`B5`	30 meters	1.55 - 1.75 μm	Shortwave infrared 1
`B6_VCID_1`	60 meters	10.40 - 12.50 μm	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`	60 meters	10.40 - 12.50 μm	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`	30 meters	2.08 - 2.35 μm	Shortwave infrared 2
`B8`	15 meters	0.52 - 0.90 μm	Panchromatic
`BQA`	30 meters		Landsat Collection 1 QA Bitmask (See Landsat QA page)
Bitmask for BQA Bit 0: Designated Fill 0: No 1: Yes Bit 1: Designated Pixel 0: No 1: Yes Bits 2-3: Radiometric Saturation 0: No bands contain saturation 1: 1-2 bands contain saturation 2: 3-4 bands contain saturation 3: 5 or more bands contain saturation Bit 4: Cloud 0: No 1: Yes Bits 5-6: Cloud Confidence 0: Not Determined / Condition does not exist. 1: Low, (0-33 percent confidence) 2: Medium, (34-66 percent confidence) 3: High, (67-100 percent confidence) Bits 7-8: Cloud Shadow Confidence 0: Not Determined / Condition does not exist. 1: Low, (0-33 percent confidence) 2: Medium, (34-66 percent confidence) 3: High, (67-100 percent confidence) Bits 9-10: Snow / Ice Confidence 0: Not Determined / Condition does not exist. 1: Low, (0-33 percent confidence) 2: Medium, (34-66 percent confidence) 3: High, (67-100 percent confidence)

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/C01/T1_32DAY_TOA')
                  .filterDate('1999-01-01', '2002-12-31');
var trueColor = dataset.select(['B3', 'B2', 'B1']);
var trueColorVis = {
  min: 0,
  max: 0.4,
  gamma: 1.2,
};
Map.setCenter(-3.7408, 40.4386, 8);
Map.addLayer(trueColor, trueColorVis, 'True Color (321)');

Open in Code Editor

Landsat 7 Collection 1 Tier 1 32-Day TOA Reflectance Composite

These Landsat 7 Collection 1 Tier 1 composites are made from Tier 1 orthorectified scenes, using the computed top-of-atmosphere (TOA) reflectance. See Chander et al. (2009) for details on the TOA computation. These composites are created from all the scenes in each 32-day period beginning from the first day of …

LANDSAT/LE07/C01/T1_32DAY_TOA, 32day,landsat,toa,usgs

1999-01-01T00:00:00Z/2021-12-19T00:00:00Z

Google Earth Engine

https://developers.google.com/earth-engine/datasets