Patrick Moore

David A. Hardy

Magnificent illustrations and incisive text display and explain the wonders of the cosmos while projecting a cautiously optimistic future for human space exploration efforts.

The Challenge of the Stars

Futures: 50 Years in Space

Integral Probability of Auroral Electron Flux Events from SSJ/4 DMSP F9 Electron Measurements

Who was the mysterious stranger who helped injured Londoners during the Blitz-- and then vanished? Who was the beautiful blonde girl who blazed like a supernova on the 1970s psychedelic rock scene for a few weeks--and then vanished? How could an astronaut have reached Mars decades before the first manned expedition to the planet finds her body there? Have all humanity's dreams of a majestic ancient Martian civilization been more than just dreams? Is the future of the human race at stake? In the grand tradition of Arthur C. Clarke, a stunning hard sf novel--the first from internationally known astronomical artist David A. Hardy--that will stretch your imagination in ways you've never experienced before. A science-fictional tour de force, now revised and expanded in a stunning Second Edition!

A Child of Two Worlds: A Science Fiction Novel

Aurora

Challenge of the Stars

Alan Huber

M. S. Gussenhoven

In addition to weather monitoring devices, the Defense Meteorological Satellite Program satellites currently have on-board auroral imaging devices, precipitating electron detectors, and thermal plasma analyzers. Together these provide a strong tool for analyzing the high latitude, near earth, magnetospheric environment. The program is planned to continue into the 1980s. The precipitating electrons are measured in 16 energy channels spanning an energy of 50 eV to 20 keV. The data have the potential of providing real-time monitoring of auroral activity through oval boundary measurements. To facilitate the use of these data and to examine the feasibility of making consistent, reliable boundary measurements, this report has been prepared. It contains the following: a general description of the DMSP-F2 orbit, its variations in universal time and season, and the pertinence of these variations to boundary measurements, a description of the SSJ/3 pakcage, one of which is built for each of four DMSP satellites and the results of calibrating two of the instruments; a discussion of the way data is processed; a comparison of Northpole-Southpole passes during a magnetospherically quiet period and during an active period, and a discussion of the general features of the electron precipitation as they may be used to determine auroral boundaries.

Calibration and Data Presentation

The Precipitating Electron Detectors (SSJ/3) for the Block 5D/ Flights 2-5 DMSP Satellites

Who was the mysterious stranger who helped injured Londoners during the Blitz -- and then vanished? Who was the beautiful blonde girl who blazed like a supernova on the 1970s psychedelic rock scene for a few weeks -- and then vanished? How could an astronaut have reached Mars decades before the first manned expedition to the planet finds her body there? Have all humanity's dreams of a majestic ancient Martian civilization been more than just dreams? Is the future of the human race at stake? In the grand tradition of Arthur C. Clarke, a stunning hard sf novel -- the first from internationally known astronomical artist David A. Hardy.

David A. Hardy

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