The LDCM Thermal Infrared Sensor
Feb 26, 2015Landsat 8 Thermal Sensor Update

After extensive investigation and testing, the decision has been made to switch the TIRS Mechanism Control Electronics from the primary to redundant side on Monday, March 2, 2015.

energy reaching TIRS
Feb 19, 2015Landsat 8 Remote Sensing Special Issue

A trio of Landsat calibration scientists—Brian Markham (NASA Goddard Space Flight Center), Jim Storey (Stinger Ghaffarian Technologies for USGS EROS) and Ron Morfitt (USGS Earth Resources Observation and Science Center) Landsat 8 Special Issue of the journal Remote Sensing.

USGS Landsat 8 TIRS Update
Jan 27, 2015USGS Landsat 8 TIRS Update

On December 19 the TIRS instrument on Landsat 8 was reconfigured due to detection of anomalous current levels associated with the scene select mirror encoder electronics. Since that time substantial testing has been conducted to isolate the root cause of the problem and to evaluate options for returning to routine operations.

A Landsat thermal image with banding
Oct 31, 2014Landsat Ghostbusters—How the Landsat Calibration Team Caught a Ghost

Shortly after the launch of Landsat 8, the calibration team noticed something strange: bright and dark stripes, or “banding” was showing up across certain images collected by the satellite’s Thermal Infrared Sensor (TIRS). Prelaunch testing of the sensor had indicated that highly accurate measurements (within 1 Kelvin) with little “noise” could be expected—what was going on?

saturation event
Oct 14, 2014Keeping Cal

The Landsat calibration team published a number of papers in the SPIE Conference Volume 9218: Earth Observing Systems XIX. Our calibration team (or cal team) is a group of scientists and engineers who work together to ensure the scientific quality of Landsat data—they are the people who make it possible for us to compare Landsat images day-to-day and year-to-year. Simply said, they make change-over-time research possible.

Ivanpah Valley
Aug 28, 2014Sun Seekers Unite in Ivanpah Playa

On public land in the Ivanpah Valley near the California/Nevada border, the world’s largest concentrated solar thermal plant sprawls across the desert landscape. Just on the other side of Interstate 15 (the long straight diagonal line) is the location of a Landsat calibration site.

Spectral band importance in societal benefit areas
Jun 19, 2014National Land Imaging Requirements Pilot Project: Summary of Moderate Resolution Imaging User Requirements

Under the National Land Imaging Requirements (NLIR) Project, the U.S. Geological Survey (USGS) is developing a functional capability to obtain, characterize, manage, maintain and prioritize all Earth observing (EO) land remote sensing user requirements. The goal is a better understanding of community needs that can be supported with land remote sensing resources, and a means to match needs with appropriate solutions in an effective and efficient way.

Landsat Cal/Val Team
Mar 13, 2014Landsat Cal/Val Team Receives 2013 Robert H. Goddard Award for Science

Landsat helps scientists comprehend what changes have occurred on Earth’s land surfaces. Since 1972, Landsat satellites have been amassing information about the land cover of our planet and land cover, as obscure as it may sound, is important for our understanding of big issues like water use, carbon stocks, and global crop production.

Lunar image from OLI March
Feb 28, 2014Landsat 8 Images Earth’s Biggest Satellite—Check it Out

Landsat 8 was built to do something none of its predecessors had done before: look at the Moon. You may ask why an Earth-observing mission would want to image Earth’s natural orbiting celestial body. Well, it all goes back to getting good data of Earth.

Landsat 8 Reprocessing Details
Jan 7, 2014Landsat 8 Reprocessing Details

Beginning February 3, 2014, all Landsat 8 data held in the USGS archives will be reprocessed. All Landsat 8 scenes will be removed from the online cache at this time and the data will then be reprocessed starting with the most recent acquisitions and proceeding back to the beginning of the mission. Data will then become available for download. Scenes waiting to be reprocessed will also be available for on-demand product orders. Reprocessing is expected to take approximately 50 days.

Landsat 8, artist's rendition
Nov 21, 2013NASA & USGS to Host a Sustainable Land Imaging Users Forum

On December 4, the U.S. Geological Survey (USGS) and NASA will host an event in which leadership from both agencies will provide details about how user needs will be assessed to help inform NASA’s Sustainable Land Imaging Program.

Landsat 8 Reprocessing Rescheduled (Revised)
Nov 14, 2013Landsat 8 Reprocessing Rescheduled (Revised)

The majority of the radiometric calibration changes indicated in the October 25, 2013 calibration notice have been deferred to early-2014, to coincide with a software update for the Landsat Product Generation System (LPGS). Therefore, reprocessing of the entire Landsat 8 archive will not occur before early-2014.

Springtime temp, 2090
Nov 13, 2013NASA Brings Earth Science ‘Big Data’ to the Cloud with Amazon Web Services

NASA and Amazon Web Services Inc. (AWS) of Seattle, Wash., are making a large collection of NASA climate and Earth science satellite data available to research and educational users through the AWS cloud.

Upcoming Change in Landsat 8 Radiometric Calibration
Oct 25, 2013Upcoming Change in Landsat 8 Radiometric Calibration

In the near future, calibration changes will be made that will affect the Thermal Infrared Sensor (TIRS) Band 10 and all of the Operational Land Imager (OLI) bands onboard Landsat 8.

Landsat Update: Upcoming Landsat 8 Reprocessing
Oct 21, 2013Landsat Update: Upcoming Landsat 8 Reprocessing

Within the next several weeks, all Landsat 8 data that have been acquired since achieving WRS-2 operational orbit will be reprocessed using updated calibration parameters for OLI and TIRS data. During this time, all online products will be purged and the online inventory will be re-populated.

Landsat 7 Thermal Band Calibration Update
Sep 27, 2013Landsat 7 Thermal Band Calibration Update

Effective October 1, 2013, the calibration of the Landsat 7 Enhanced Thematic Mapper Plus (ETM+) Band 6 will be updated to correct a bias error that has been present in all thermal data since the last calibration update in 2010. Vicarious calibration teams detected a bias error of 0.036 watts per square meter steradian micron (W/(m2 sr µm)) that causes overestimation of top-of-atmosphere temperatures by approximately 0.26 Kelvin (K) at 300K. Calibration parameters within the Calibration Parameter File (CPF) have been adjusted to correct for this bias error.

USGS logo
Sep 27, 2013Landsat 8 CPF Update Following Safehold

On September 19, 2013 (DOY 262) at approximately 20:08 UTC, Landsat 8 experienced an unplanned transition to safe hold following an attitude control anomaly. Precision attitude control was recovered and imaging operations resumed on day of year 264 (September 21, 2013).

Sep 5, 2013ESA Makes Never-Before-Seen Landsat Data Available

Thousands of never-before-seen data products from the U.S. Landsat satellites acquired over 30 years have been released for online access. In addition, the newest data over Europe from the latest satellite in the series, Landsat 8, are now accessible in near-real time through a new portal hosted by ESA.

Landsat 8 Satellite
Aug 8, 2013Landsat 8 Status Update for Aug. 8, 2013

Landsat 8 officially began normal operations on May 30, 2013, when the leadership for satellite operations transferred from NASA to the U.S. Geological Survey. With the hand-off, the name of the satellite changed from the Landsat Data Continuity Mission to Landsat 8. The USGS now manages the satellite flight operations team within the Mission Operations Center, which remains located at NASA’s Goddard Space Flight Center in Greenbelt, Md.

Landsat 8
Jul 30, 2013Data User Advisory

ENVI HotFix now available.