New radio sky surveys

A new all-sky radio continuum survey at 408 MHz has recently been completed, which up to now represents the most accurate map of radio emission from the whole sky. This map forms a new standard for comparison with other astronomical observations. To study the physical nature of the radio emission from different areas in our Galaxy, further observations at higher frequencies are required. A companion 1420 MHz survey will cover the whole sky too, while at 2700 MHz high-resolution observations concentrate on complex radio sources along the galactic plane.