Landsat7 Archive

Posts Tagged ‘Landsat7’

Apr 1, 2007Landsat 7 Transitions to Bumper Mode

As reported on the USGS Landsat website: “On April 1, 2007, the Landsat 7 mission will begin imaging in an alternate mirror-scanning control mode from the original Scan Angle Monitor (SAM) process that has been used since the satellite was launched in 1999. This change, known as Bumper Mode, is necessary due to a predictable […]

Nov 30, 2006Landsat Semi-Annual Calibration Meeting Held

NASA and USGS work jointly to maintain and refine as necessary, the radiometric and geometric calibrations of the Landsat 5 TM and Landsat 7 ETM+. As part of this effort, NASA funds several external teams that provide independent analyses and perform vicarious radiometric calibrations. Twice yearly, these investigators meet with USGS and NASA personnel to […]

EarthNow logo
Nov 3, 2006Watch as Landsat Data Are Collected

The U.S. Geological Survey (USGS) has made it possible for you to watch as swaths of data from the Landsat 5 and Landsat 7 satellites are collected and downloaded to the USGS Center for Earth Resources Observation and Science (EROS) in Sioux Falls, SD. USGS EarthNow! displays data received from the Landsat 5 and Landsat 7 satellites […]

PE&RS Oct. 2006 cover
Oct 1, 2006PE&RS Landsat Special Issue Released

The October 2006 Photogrammetric Engineering and Remote Sensing (PE&RS) Journal of the American Society for Photogrammetry and Remote Sensing (ASPRS) is a Landsat Special Issue. The special issue features articles about LDCM requirements, the historical record of Landsat global coverage, the Landsat 7 Long-Term Acquisition Plan (LTAP), LTAP radiometry, the ETM+ Automated Cloud-Cover Assessment (ACCA), […]

Sep 28, 2006Landsat Legacy Oral Histories Recorded in Santa Barbara

A set of Landsat Legacy interviews were conducted just north of Santa Barbara, CA on Thursday, Sept. 28, 2006. Landsat veterans from the Raytheon Santa Barbara Research Center were digitally recorded as they recounted their experiences building the MSS, TM, ETM, and ETM+ sensors that flew on the Landsat satellites. In the morning, Dr. Robert Tally, an […]

Aug 29, 2006Sam Goward to Receive 2006 USGS John Wesley Powell Award

Dr. Sam Goward, the former Landsat 7 Science Team Leader and a Professor of Geography at the University of Maryland, has been selected to receive the 2006 USGS John Wesley Powell Award. Dr. Goward has been selected to receive the award because of his role in (1) increasing public awareness of the USGS mission, (2) […]

Hawaii's Pearl and Hermes Atoll image
Jul 27, 2006Landsat Coral Reef Images Key to New Global Survey

Detailed global coral reef maps created with Landsat 7 imagery have enabled scientists to determine which reefs have adequate protection. It is well documented that coral reef biodiversity is in decline due to anthropogenic influences such as over fishing, coastal development, and pollution. Using Landsat-derived coral reef maps in conjunction with an updated inventory of […]

Icey Pier on Lake Ontario
Jun 13, 2006Landsat Semi-Annual Calibration Meeting Held

Jun 13, 2006 • NASA and USGS work jointly to insure the radiometric and geometric calibrations, both current and historical, of the Landsat 5 TM and Landsat 7 ETM+ are maintained and refined. As part of this effort, NASA funds several external teams that provide independent analyses and perform vicarious radiometric calibrations. Twice yearly, these […]

Apr 15, 2006Landsat 7 turns seven

Apr 15, 2006 • On this day in 1999, Landsat 7 was launched into orbit. Landsat 7 is the latest satellite in the Landsat series. Landsat 7 operations continue today, despite the Scan Line Corrector (SLC-off) anomaly.

Mar 19, 2006Landsat 7 Tests Bumper Mode Operations

Operations of Landsat 7 in bumper mode were successfully tested over several geometric calibration sites on Mar. 3 and 19. Currently, the motion of Landsat 7’s scan mirror during imaging is controlled with the Scan Angle Monitor (SAM). However, the scan mirror assembly will wear over time and impede the instrument’s ability to synchronize the […]