The collection consists of all Sentinel-3 SRAL Level 1 products covering whole observation area (global) since 2016-06-15. The SRAL instrument comprises one nadir-looking antenna, externally mounted on the satellite's +Zs Earth panel, and a central electronic chain composed of a Digital Processing Unit (DPU) and a Radio Frequency Unit (RFU). The central electronic chain is mounted inside the satellite on the -Ys panel in a cold redundant configuration.

The main frequency used for range measurements is the Ku-band (13.575 GHz, bandwidth 350 MHz), while the C-band frequency (5.41 GHz, bandwidth 320 MHz) is used for ionospheric correction.

The SRAL instrument includes measurement, calibration and support modes. The measurement modes are composed of two radar modes combined with two tracking modes.