Landsat 8

Landsat 8
Orbital Sciences Corporation · Public domain · source
Name	Landsat 8
Mission type	Earth observation
Operator	National Aeronautics and Space Administration / United States Geological Survey
Launch date	2013-02-11
Launch vehicle	Atlas V
Launch site	Vandenberg Space Force Base
Orbit	Sun-synchronous
Instruments	Operational Land Imager, Thermal Infrared Sensor

Landsat 8 is an American Earth observation satellite jointly managed by the National Aeronautics and Space Administration and the United States Geological Survey. Designed as part of the long-running Landsat program, it continues a multi-decade record of multispectral and thermal imagery used worldwide by agencies, researchers, and industries. The mission provides calibrated, systematic observations that support applications across environmental monitoring, agriculture, geology, water resources, and disaster response.

Overview

Landsat 8 was developed to succeed earlier platforms in the Landsat program with improved radiometric sensitivity and spectral coverage to monitor terrestrial change. The spacecraft operates in a near-polar, sun-synchronous orbit coordinated with historical Landsat acquisitions to maintain a consistent global record used by institutions such as NASA, USGS, European Space Agency, National Oceanic and Atmospheric Administration, United Nations Environment Programme, and national mapping agencies. Its data policy aligns with open-access initiatives promoted by leaders like Barack Obama and organizations including the Group on Earth Observations and Committee on Earth Observation Satellites.

Spacecraft and Instruments

The spacecraft bus was constructed under contract by Orbital Sciences Corporation and integrates two primary instruments: the Operational Land Imager (OLI) and the Thermal Infrared Sensor (TIRS). OLI provides multispectral imagery with bands informed by heritage sensors used on Landsat 5 and Landsat 7, enhancing observations used by agencies such as the U.S. Forest Service, U.S. Geological Survey, European Space Agency, Japan Aerospace Exploration Agency, and academic groups at NASA Goddard Space Flight Center and Jet Propulsion Laboratory. TIRS supplies thermal infrared data important to hydrologists at United States Bureau of Reclamation, agronomists at Food and Agriculture Organization, and climatologists at institutions like Scripps Institution of Oceanography and Lamont–Doherty Earth Observatory.

Mission History and Operations

The program began with development milestones overseen by federal contractors and scientific advisory panels including participants from Massachusetts Institute of Technology, Colorado State University, University of Maryland, University of Arizona, and University of California, Berkeley. After construction and testing at facilities linked to Raytheon, the spacecraft was integrated for launch aboard an Atlas V rocket from Vandenberg Space Force Base with launch campaign coordination involving United Launch Alliance and the Department of Defense range operations. Post-launch commissioning activities engaged teams at USGS EROS Center, NASA Goddard, and international partners such as Canadian Space Agency and Australian CSIRO for calibration, validation, and operational handover. Routine operations encompass tasking, data downlink, and archival through the USGS Earth Resources Observation and Science (EROS) Center and global mirror sites used by researchers at University of Cambridge, Imperial College London, and ETH Zurich.

Data Products and Processing

Landsat 8 produces Level-1 data that are systematically processed into orthorectified and radiometrically corrected products used by analysts at European Commission, World Bank, United Nations, NASA Earth Observing System Data and Information System, and commercial firms like Planet Labs and Maxar Technologies. Processing pipelines employ algorithms developed in collaboration with academic groups at University of Colorado Boulder, Purdue University, Texas A&M University, and University of Illinois Urbana-Champaign. Product suites include surface reflectance, surface temperature, and vegetation indices widely used by institutions such as NASA Jet Propulsion Laboratory, NOAA National Centers for Environmental Information, and USDA Natural Resources Conservation Service. Data distribution leverages archives and mirror services operated by Google Earth Engine, Amazon Web Services, and national data centers in Canada, Australia, and Japan.

Applications and Impact

Applications span resource management by U.S. Forest Service, urban planning by municipal authorities like New York City Department of Environmental Protection, and disaster response coordinated through Federal Emergency Management Agency and International Red Cross. Researchers at Columbia University, Stanford University, Harvard University, Massachusetts Institute of Technology, and University of Oxford use the imagery for land cover change, carbon accounting for programs like REDD+, water use studies for agencies such as Bureau of Reclamation, and crop monitoring for Food and Agriculture Organization initiatives. Environmental assessments by United Nations Environment Programme and climate studies at Intergovernmental Panel on Climate Change draw on the long-term continuity maintained by Landsat-class observations. Commercial sectors—including insurance firms in London, mining companies in Western Australia, and energy firms in Texas—use the data for risk assessment, exploration, and regulatory compliance.

Calibration and Performance

Calibration efforts involve vicarious campaigns and on-orbit cross-calibration with missions such as Sentinel-2, MODIS, ASTER, EO-1, and sensors on Terra and Aqua. Teams from USGS EROS Center, NASA Goddard, European Space Agency, Canadian Space Agency, and academic labs at University of Arizona and University of Wisconsin–Madison perform radiometric and geometric validation. Instrument performance monitoring addresses issues identified post-launch, with mitigation strategies coordinated among contractors like Ball Aerospace and agencies including NASA and USGS to ensure data continuity for users such as NOAA and UNESCO.

Launch and Mission Timeline

The satellite launched on 11 February 2013 aboard an Atlas V rocket in a mission supported by United Launch Alliance and mission control teams at Vandenberg Space Force Base. Commissioning activities completed within months, after which routine operations and global data distribution were established via the USGS EROS Center and partner archives. Subsequent milestones included integration of data into platforms like Google Earth Engine and cross-calibration campaigns with Sentinel-2 and MODIS, ensuring the mission’s role in the multi-decadal Landsat program legacy relied upon by international science, policy, and industry communities.

Category:Earth observation satellites Category:United States Geological Survey Category:NASA missions