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.

Satellite Characteristics:

• Geoscience Australia started acquiring ETM+ data from the Landsat 7 satellite in July 1999. The Geoscience Australia archive is the largest repository of Landsat 7 images covering Australia.
• A fault with the Landsat 7 Scan Line Corrector (SLC) occurred on 31 May 2003 resulting in small gaps in the processed products.
• The Landsat Thematic Mapper (TM) is a sensor onboard the Landsat 4 and Landsat 5 spacecrafts. It provided information on the Earth's surface in the visible, near, middle and thermal infrared regions of the electromagnetic spectrum. Thematic Mapper data of Australia, Papua New Guinea and South-Eastern Indonesia was acquired in Australia from September 1987 until 31 December 1999. Acquisitions of Landsat 5 TM data recommenced on 1 July 2003 and ceased on 18 November 2011.