Burrow / Drone Collection (lowest)
Hideaway / Drone Cluster
Refuge / Drone Gathering
Den / Drone Gathering
Yard / Drone Surveillance
Rally Point / Drone Menagerie
Port / Drone Herd
Hub / Drone Squad
Haven / Drone Patrol
Sanctum / Drone Horde (hardest)

Hidden Hub (easiest)
Forsaken Hub
Forlorn Hub (hardest)
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Angel Cartel-Domination
Blood Raiders-Dark
Guristas-Dread
Sansha's-True
Serpentis-Shadow
Rogue Drones-Sentient

GRAVIMETRIC: Hidden asteroid belts
MAGNETOMETRIC: Archaeology/Salvage profession sites
RADAR: Hacking profession sites
LADAR: Gas Cloud sites