The clearest public reference is the 9K510 portable illumination system, which Missilery attributes to specialists from NPO Splav and related enterprises. That system combined the 9M42 unguided illumination rocket with a launcher and launch panel, giving Soviet forces a portable way to place a parachute-suspended flare over a target area for roughly 90 seconds.
The phrase belongs to the wider Soviet/Russian multiple-rocket industrial base around Splav rather than to a separately identifiable export brand. Supporting references on the connected 9M42 rocket and the U.S. Army ODIN 9P132/9K510 page place the public catalog connection in Grad-family 122 mm rockets, portable one-round launchers, and illumination ammunition rather than in vehicle-mounted salvo launchers alone.
122 mm rocket artillery ammunitionportable illumination rocket systemsGrad-family support equipmentSoviet/Russian rocket-artillery production network
Open sources do not identify related enterprises as a standalone legal entity with its own headquarters or separate website. Public evidence ties the wording to a cooperating-enterprise network around NPO Splav for the connected 9K510 and 9M42 records; headquarters and map coordinates are omitted for that reason.