1. An overview of the atmosphere; 2. The history of radar in atmospheric investigations; 3. Refractive index of the atmosphere and ionosphere; 4. Fundamental concepts of radar remote sensing; 5. Configurations of atmospheric radars - antennas, beam patterns, electronics and calibration; 6. Examples of specific atmospheric radar systems; 7. Derivation of atmospheric parameters; 8. Digital processing of doppler radar signals; 9. Multiple-receiver and multiple-frequency radar techniques; 10. Extended and miscellaneous applications of atmospheric radars; 11. Gravity waves and turbulence; 12. Meteorological phenomena in the lower atmosphere; 13. Concluding remarks.