The early warning contour in the Russian air defense system has been strengthened: the "Nebo-UM" radar complex in the meter range has become a key source of primary target designation for the S-400 air defense system, expanding its capabilities for detecting low-observable targets, including fifth-generation fighters. This was reported by IDRW.
According to the source, the modernized "Nebo-UM" and S-400 combination forms an echeloned system in which long-range surveillance and fire engagement are functionally separated but united by a single digital control network.
The "Nebo-UM" radar complex is integrated into the air defense structure as a long-range surveillance station, operating in the VHF range and designed for early detection of aerial targets with reduced radar visibility.
The main effect of this configuration is related to the physics of meter waves: they interact differently with the geometry of low-observable aircraft than traditional centimeter radars. This allows targets to be detected earlier than they enter stable tracking by high-frequency systems.
Next, the anti-aircraft complex receives refined data for tracking and interception. This approach reduces reaction time and increases operational stability against targets using stealth technologies and active electronic countermeasures.
"Nebo-UM" belongs to a new generation of meter-wave radars with digital signal processing and improved jamming immunity. The complex is capable of providing three-dimensional target coordinates – range, azimuth, and altitude, which is critical for distributing targets among fire assets.
In fact, the system transitions from single radars to a network model, where different frequency ranges complement each other and cover the weaknesses of individual detection types.