Nag, developed by the Defence Research and Development Organisation, is a third generation "fire-and-forget" guided missile with capability of detecting and hitting the targets with a very low thermal contrast.
The maximum range of the missile is 4 km which, however, it fails to meet during peak summer temperatures.
"We have requested the defence minister and he told us to talk to the Army that as the first phase they may accept it with a slightly reduced range and that too only in the middle of the day (11 AM to 3 PM). In the second phase we will try and improve upon the target," Director General, DRDO, S Christopher told reporters here.
However, after 4 PM, the missile is able to identify the target up to 4 km, he added.
The missile has been under development as part of the Integrated Guided Missile Development Program (IGMDP) initiated in early 1980s. Nag is the last of the five missile systems developed by the DRDO under IGMDP.