Why Geothermal Energy?

Why Geothermal Energy? Four main factors make geothermal energy appealing: geothermal kilowatt hours are generally cost competitive with conventional sources of energy; the production of geothermal energy is not associated with significant release of greenhouse gases or waste generation; unlike solar and wind power, geothermal power is predictable and typically supplies uninterrupted energy; and the […]  More »

An Integrated Approach to a Geothermal Resource Assessment

An Integrated Approach to a Geothermal Resource Assessment Geothermal resource studies focused on the Imperial Valley of California indicate that there is plenty of room to expand production of a clean, renewable, and abundant energy source. Karen L. Jones Global energy use during the past 20 years has increased 70 percent and is expected to […]  More »

Rocket Soot Emissions and Climate Change

Rocket Soot Emissions and Climate Change Scientists at The Aerospace Corporation have been studying the effects of rocket launch emissions on the atmosphere in anticipation of growing trends in space launch activities. Martin Ross If the space transport industry grows significantly in coming years, whether by tourists traveling to space or crew and cargo heading […]  More »

Aerospace LWIR Instrumentation

Aerospace LWIR Instrumentation The research described in this article was possible in part by airborne deployments of the Spatially Enhanced Broadband Array Spectrograph System (SEBASS). First commissioned in 1995, SEBASS is a nadir-viewing, roll-compensated, pushbroom hyperspectral imager comprising two spectrographs, one operating in the midwave infrared (MWIR) region at 2.9–5.2 microns, and the other in […]  More »

Fundamentals of Spectral Imaging

Fundamentals of Spectral Imaging Spectral imaging is an umbrella term that encompasses all techniques whereby the electromagnetic radiation recorded from a given scene is resolved according to wavelength. Historically, the number of channels into which the light is divided has determined the nomenclature. Hence, systems with less than 100 spectral channels are termed multispectral, those […]  More »

The Adaptation of Tactical Imaging Spectrometry to Applications in Earth Science

The Adaptation of Tactical Imaging Spectrometry to Applicationsin Earth Science Long-wave infrared imagery is being applied to Earth observation activities in anticipation of future needs to assess climate change impacts around the globe and assist the national security community in defining future observational requirements. David M. Tratt and George J. Scherer There is increasing awareness […]  More »

The National Environmental Policy Act

The National Environmental Policy Act The National Environmental Policy Act (NEPA), signed into law on January 1, 1970, requires federal agencies to study and document the effects of their actions on the environment. Potential impacts on human health and safety; air, soil, and water quality; ecosystems; cultural and historical resources; land use; and socioeconomics resulting […]  More »

Green Propulsion: Trends and Perspectives

  Green Propulsion: Trends and Perspectives Environmentally friendly alternatives could reduce the risk and cost of propulsion systems. Aerospace has been investigating possible candidates for national security space systems. John D. DeSain The propellants used in space programs pose environmental concerns in four main areas: ground-based impacts, atmospheric impacts, space-based impacts, and biological impacts. Ground-based […]  More »

Space Support For Disaster Relief

Space Support For Disaster Relief The U.S. military humanitarian responses to Pakistan’s flooded regions in 2010 and Japan’s quake- and tsunami-stricken northeast in 2011 are indications of how worldwide natural disasters are affecting U.S. national security priorities. Currently, environmental and disaster relief organizations rely primarily on civilian and commercial space systems for humanitarian operations. Iridium […]  More »

An Aerospace Simulation Scenario

An Aerospace Simulation Scenario The Aerospace simulation uses initial resource deposits as estimated by British Petroleum (BP). Total initial deposits were 1.3 × 1012 tons of coal, 1.2 × 1012 barrels of oil, and 3.3 × 106 tons of uranium ore at the end of 2006. When the simulation is run, shortages of essential resources […]  More »

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