SLC - 2 Radar The SLC - 2 Radar is a Chinese counter - battery radar designed to locate hostile artillery , rocket and ground - to - ground missile launchers immediately after firing , and to support friendly artillery by guiding counter - battery fire . SLC - 2 radar can also be applied in adjusting firing of friendly weapons or rockets . With slight modification to software parameters the radar can also be used to detect and track low flying targets such as light aircraft , helicopters and RPVs . SLC - 2 systems have sometimes been mounted on a Dongfang EQ2102 3 . 5 ton truck . Development . Four AN / TPQ - 37 Firefinder radar were sold to China , and these became the foundation of SLC - 2 radar development . Aside from political reasons , the US $ 10 million plus unit price tag of TPQ - 37 ( including after sale logistic support ) was simply too costly for Chinese . The decision was made to develop a domestic equivalent after mastering the technologies of TPQ - 37 . After the initial test of TPQ - 37 in Tangshan ( 汤山 ) Range near Nanjing in 1988 , and in Xuanhua District in October of the same year , several shortcomings of TPQ - 37 were discovered and further intensive tests were conducted and completed in 1994 . The requirement of the Chinese domestic equivalent was subsequently modified to address these issues revealed in trials . Due to the limitation of the Chinese industrial capability at the time , decision was made to develop the Chinese domestic equivalent in several steps . The first step was to develop a smaller one , which would result in the Chinese equivalent of AN / TPQ - 36 Firefinder radar , and based on the experience gained from this program , a more capable larger version in the same class of AN / TPQ - 37 Firefinder radar would be developed , which eventually resulted in SLC - 2 series . Type 373 Radar . This is the predecessor of SLC - 2 radar . Type 373 radar is fielded after the Type 704 Radar series , which Type 373 radar is based on . Type 373 radar is designed to specifically improve the performance of TPQ - 37 by solving the shortcoming revealed in tests . One of limitations of TPQ - 37 revealed in tests was that the it was less effective against projectiles with flat trajectory , so it is much more effective against howitzer and mortar rounds than rounds from 130 mm towed field gun M1954 ( M - 46 ) and its Chinese derivative Type 59 - 1 . Type 373 radar is designed to improve the capability against rounds with flat trajectory . Another problem revealed in the tests was that the reliability of TPQ - 37 is much lower than what was claimed . The reason was that when TPQ - 37 was deployed in environments with high humidity and high level of rainfall ( southern China ) , high salinity ( coastal regions ) , high altitude ( southwestern China ) , and subjected to daily high temperature differences ( northwestern China ) , malfunctions occurs more frequently . Type 373 radar was designed specifically to improve the reliability against these harsh environmental factors . SLC - 2 . As Chinese capability in microelectronics matured , an updated version of passive phased array Type 373 radar is developed , designated as SLC - 2 . This is a fully solid - state , highly digitized version that adopts planar active phased array antenna . One of the shortcomings of TPQ - 37 revealed in tests was in its multi - targeting capability . When enemy artillery batteries located more than two hundred meters apart fires simultaneously , TPQ - 37 could provide accurate coordinate for distance , but coordinates for positions were less accurate . This would not be a problem for most users because TPQ - 37 can be used in pairs in conjunction , provide accurate coordinates for locations . However , these costly radars could not be purchased in large numbers and China thus developed the capability for SLC - 2 to provide accurate coordinates for both distance and position . Bangladesh Bought two in 2012 . " http : / / www . security - risks . com / security - trends - south - asia / bangladesh / armed - forces - modernisation - and - upgradation - 1672 . html " < / ref > References . 1 . " Fire Control Radar Technology " , Dec 1999 issue , Xi ' an Electronics Research Institute ( also known as Institute No . 206 of China Arms Industry Group Corporation ) , Xi ' an , December , 1999 , ISSN : 1008 - 8652 ， Domestic Chinese SN : CN 61 - 1214 / TJ . 2 . " Fire Control Radar Technology " , Feb 1995 issue , Xi ' an Electronics Research Institute ( also known as Institute No . 206 of China Arms Industry Group Corporation ) , Xi ' an , February , 1995 , ISSN : 1008 - 8652 ， Domestic Chinese SN : CN 61 - 1214 / TJ . 3 . " Ordnance Knowledge " , Jul 2007 issue , Ordnance Knowledge Magazine Publishing House , Beijing , July , 2007 , ISSN : 1000 - 4962 , Domestic Chinese SN : CN 11 - 1470 / TJ .