The Tor, also called the SA-15 Gauntlet by NATO, is a short-range "point defence" system that integrates the missile launcher and radar into a single tracked vehicle. It is designed to be mobile and lethal against targets at altitudes up to 6,000 metres (20,000 feet) and at ranges of 12 km (7.5 miles), according to the Federation of American Scientists, which researches and analyses "catastrophic threats to national and international security".

from Times of India https://timesofindia.indiatimes.com/world/middle-east/explainer-missile-system-suspected-of-bringing-down-ukraine-airliner/articleshow/73182656.cms