The PJT-531 Battle Field Surveillance Radar- Short Range (BFSR-SR) is a man portable 2D short range Battle Field and Perimeter Surveillance Radar developed by the Indian Defence Research and Development Organization (DRDO). The BFSR has been designed by DRDO's Bangalore-based laboratory, the Electronics and Radar Development Establishment (LRDE) and is being manufactured by Bharat Electronics Limited (BEL). Over 1,400 BFSRs are now being used by the Army against moving surface targets. A BFSR radar that offers foliage penetration is under development.