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About this book
Radio observations of the cosmos are gathered by geoscientists using complex earth-orbiting satellites and ground-based equipment, and by radio astronomers using large ground-based radio telescopes. Signals from natural radio emissions are extremely weak, and the equipment used to measure them is becoming ever-more sophisticated and sensitive.The radio spectrum is also being used by radiating, or "e;active, "e; services, ranging from aircraft radars to rapidly expanding consumer services such as cellular telephones and wireless internet. These valuable active services transmit radio waves and thereby potentially interfere with the receive-only, or "e;passive, "e; scientific services. Transmitters for the active services create an artificial "e;electronic fog"e; which can cause confusion, and, in severe cases, totally blinds the passive receivers.Both the active and the passive services are increasing their use of the spectrum, and so the potential for interference, already strong, is also increasing. This book addresses the tension between the active services' demand for greater spectrum use and the passive users' need for quiet spectrum. The included recommendations provide a pathway for putting in place the regulatory mechanisms and associated supporting research activities necessary to meet the demands of both users.
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Information
Table of contents
- COVER PAGE
- THE NATIONAL ACADEMIES
- COMMITTEE ON SCIENTIFIC USE OF THE RADIO SPECTRUM
- COMMITTEE ON RADIO FREQUENCIES
- BOARD ON PHYSICS AND ASTRONOMY
- Preface
- Acknowledgment of Reviewers
- Contents
- Summary
- 1 Introduction
- 2 The Earth Exploration-Satellite Service
- 3 The Radio Astronomy Service
- 4 Technology and Opportunities for the Mitigation of Radio Frequency Interference
- 5 Findings and Recommendations
- Appendixes