OVERVIEW: The 1L13-3 Nebo radar (NATO name: BOX SPRING) is a mobile, 2-D early warning radar operating in the A/B Band.
DETAILS: The 1L13-3 Nebo radar ECCM features include pulse to pulse frequency agility. It is designed to reject chaff automatically.
Specifications:
Frequency: 30-300 MHz (approx)(NATO A/B Band)(IEEE: VHF Band)
Power output: 120-140 kW (peak)
PRF: 300 Hz
Accuracy: 400 m/ 0.67 degrees azimuth
Runup time: Unknown
Set up/Stow time: 45 minutes / 45 minutes
Detection Ranges (Fighter-size aircraft)
500 m altitude: 60 km
10,000 m altitude: 250 km
27,000 m altitude: 350 km
NOTES: IOC 1986. Capable of being used as part of a radar system to provide a valuable early warning capability against low observable aircraft. As part of an IADS system, the 1L13 Nebo would be used to cue the high power aperture X-band systems to a small acquisition box in which the VLO aircraft can be found.
SOURCES: "Russian / PLA Low Band Surveillance Radar Systems (Counter LowObservable Technology Radars)." Air Power Australia. Accessed April 4, 2015. http://www.ausairpower.net/APA-Rus-Low-Band-Radars.html#mozTocId481197 ; "NNIIRT Nebo SVU / RLM-M Nebo M / Assessing Russia's FirstMobile VHF AESAs." Air Power Australia. Accessed April 4, 2015. http://www.ausairpower.net/APA-Nebo-SVU-Analysis.html.
