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Article Contents

TITLE PAGE

1.INTRODUCTION

2. STATISTICS AND ASSUMPTIONS

2.1. The Amplitude Distribution and Spectrum of Fluctuations

2.2. Analysis Procedures

3.OBSERVATIONS

3.1. Observations on Angular Scales < 1'

3.2. Observations on Angular Scales 1'-1°

3.2.1. Anisotropy Observations at Green Bank, West Virginia

3.2.2. Anisotropy Observations at the Owens Valley Radio Observatory

3.2.3. Anisotropy Observations at the South Pole

3.2.4. Balloon-Borne Anisotropy Observations

3.2.5. Observations on the Ratan 600 meter Telescope

3.2.6. Summary of Upper Limits in the Range 0.1-100'

3.3. Observations on Angular Scales 1-20°

3.3.1. Observations at Saskatoon

3.3.2. Observations in Antarctica

3.3.3. Balloon Observations at 19.2 GHz

3.3.4. Balloon Observations at Millimeter and Submillimeter Wavelengths

3.3.5. Observations at Medicina and Tromsö

3.3.6. Observations at Tenerife

4. CONFUSING FOREGROUND SIGNALS

4.1. Confusion by Discrete Radio Sources

4.2. Confusion by Galactic Synchrotron Emission

4.3. Confusion by Galactic Free-Free Emission

4.4. Confusion by Galactic Dust Emission

4.5. The Sunyaev-Zel'dovich Effect

5. FUTURE PROSPECTS

5.1. Instrumental and Atmospheric Effects

5.2. New Instruments

REFERENCES