An Earth

An Alternative Earth: COMMENT

Earth as an extrasolar planet: Earth model validation using EPOXI earth observations.

The EPOXI Discovery Mission of Opportunity reused the Deep Impact flyby spacecraft to obtain spatially and temporally resolved visible photometric and moderate resolution near-infrared (NIR) spectroscopic observations of Earth. These remote observations provide a rigorous validation of whole-disk Earth model simulations used to better understand remotely detectable extrasolar planet characteris...

An Autonomous Earth - Observing Sensorweb

The need Although the South Sandwich Islands are uninhabited, NASA’s Terra and Aqua satellites fly overhead four times per day, skimming past at 7.5 kilometers per second and an altitude of 705 kilometers. Each spacecraft carries a Moderate Resolution Imaging Spectroradiometer (MODIS) instrument, which acquires resolution data of 250 to 1,000 meters/pixel about the islands as part of a 2,700-ki...

Earth Remote Sensing: An Overview

The Earth is not yet an artifact

n the previous article in this issue [1], Brad Allenby argues for a more active style of planetary management. He notes, " the biosphere itself, at levels from the genetic to the landscape , is increasingly a human product. " While the earth is undoubtedly being transformed by human action [2]-[4], the implications of the transformation for environmental management are in dispute. Allenby sugge...