Landsat Missions

Landsat 6 History

October 5, 1993 (did not achieve orbit)

Participants

  • NASA
  • National Oceanic and Atmospheric Administration (NOAA)
  • Department of the Interior (DOI) U.S. Geological Survey (USGS)
  • Spacecraft bus: Lockheed Martin Missiles & Space
  • Enhanced Thematic Mapper (ETM): Hughes Santa Barbara Research Center
     

Launch

  • Date: October 5, 1993
  • Vehicle: Titan II
  • Launched by: NASA
  • Site: Western Test Range at Vandenberg Air Force Base, California
     

Spacecraft

  • Power provided by a single sun-tracking solar array and two 50 Ampere-Hour (AHr), Nickel Cadmium (NiCd) batteries
  • Attitude control provided through four reaction wheels (pitch, yaw, roll, and skew); three 2-channel gyros with celestial drift updating; a static Earth sensor; a 1750 processor; and torque rods and magnetometers for momentum uploading
  • Orbit control and backup momentum unloading provided through a blow-down monopropellant hydrazine system with a single tank containing 270 pounds of hydrazine, associated plumbing, and twelve 1-pound-thrust jets
  • Weight: approx. 4,800 lbs (2,200 kg)
  • Length: 4.3 m (14 ft)
  • Diameter: 2.8 m (9 ft)
     

Communications

  • Direct downlink with solid state recorders capable of storing 380 gigabits of data (100 scenes)
  • Data rate: 85 Mbps
     

Orbit (if obtained)

  • Worldwide Reference System-2 (WRS-2) path/row system
  • Sun-synchronous orbit at an altitude of 705 km (438 mi)
  • Inclined 98.2° (slightly retrograde)
  • Repeat cycle: 16 days
  • Equatorial crossing time: 10:00 a.m. +/- 15 minutes
     

Sensors

Enhanced Thematic Mapper (ETM)

  • Eight spectral bands, including a pan and thermal band:
    • Band 1 Visible (0.45 - 0.52 µm) 30 m
    • Band 2 Visible (0.52 - 0.60 µm) 30 m
    • Band 3 Visible (0.63 - 0.69 µm) 30 m
    • Band 4 Near-Infrared (0.76 - 0.90 µm) 30 m
    • Band 5 Near-Infrared (1.55 - 1.75 µm) 30 m
    • Band 6 Thermal (10.40 - 12.50 µm) 120 m
    • Band 7 Mid-Infrared (2.08 - 2.35 µm) 30 m
    • Band 8 Panchromatic (PAN) (0.52 - 0.90 µm) 15 m
  • Ground Sampling Interval (pixel size): 30 m reflective, 120 m thermal
     

Other Characteristics

  • Scene size: 170 km x 185 km (106 mi x 115 mi)
     

 

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Landsat represents the world's longest continuously acquired collection of space-based moderate-resolution land remote sensing data. Four decades of imagery provides a unique resource for those who work in agriculture, geology, forestry, regional planning, education, mapping, and global change research. Landsat images are also invaluable for emergency response and disaster relief.

 

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