1L117M SURVEILLANCE RADARS
Mobile 3D Radar
Mission The 1L117M mobile 3D radar is designed to detect, identify and measure three coordinates (azimuth, slant range and altitude) of various aerial targets, as well as to provide radar data for external users. The radar can be used as part of air defence and air force automated and non-automated air defence and air traffic control syste ms. The 1L117M radar differs from its pr e de ce sso r 1L117 radar by ha vi ng the trans mitter’s klystron-base d power amplifier, which enhances stability of emitted signals, increa ses passive noise suppr e ssio n characteristics and improves the radar's abilit y to detect low-flying targets. In addition, fre qu e nc y agility im pro ves the ra dar' s jamming resistance when operating in hea v y ECM environment.
Composition The radar equipment is mounted on five vehicles: • vehicle No. 1 – transceiver; • vehicle No. 2 – co ntrol and datalink equipment and operators’ workstations; • vehicle No. 3 – diesel-electric power plant with two diesel generators; • vehicles Nos 4 and 5 – trailers to carry antenna systems and an SPTA set. The radar has an all-weather capability and
can operate in various climates at ambient temperatures between –40°C and +50°C, in relative humidity 98% and at an altitude above sea level amounting to 3,000 m. The radar can be transported by automobile, railway and sea transport.
Waveband Coverage area:
centimetric
range, km elevation, deg
350 28
azimuth, deg Detection range (target RCS = 1 sq.m, jam-free environment), km, not less than: at 500 m at 3,000 m
360
70 140
at 5,000 - 15,000 m Detection range (target RCS = 10 sq.m, jam-free environment), km, not less than:
180
at 500 m at 3,000 m
70 160
at 8,000 m at 10,000 - 25,000 m
280 320
Coordinates measurement accuracy (target RCS = 10 sq.m): range, m azimuth, ang.min altitude, m
150 7 400
Number of target tracks Clutter rejection ratio, dB
not less than 200 not less than 45
Mean time between failures, hrs Deployment/out-of-action time, hrs
not less than 350 not more than 8
45