System for Differential Corrections and Monitoring

The System for Differential Corrections and Monitoring (SDCM), is the satellite-based navigation augmentation system operated by Russia's Roscosmos space agency to augment the precision of the GLONASS satellite navigation system.

[1] It uses the Luch Multifunctional Space Relay System to transmit correction data.

[2] SDCM's service area covers the Russian Federation.

As of 2021[update] it had not yet been certified for use for public aviation.

[3] This spacecraft or satellite related article is a stub.