Tagrean defense platform
From The Stargate Omnipedia
Highly mobile, balloon-shaped weapons platform of Tagrean design, capable of relocating across many kilometers in a short period of time to serve the needs of Tagrea's military leadership. The devices often work in teams, swarming threats.
Their weapons yield is unknown.
KEY EPISODE
Memento - After Prometheus is permitted to enter the atmosphere of Tagrea, multiple defense platforms are assigned to surround the vessel.