From SC2Pod
The Orbital Command is an upgraded Command Center that can produce MULEs (which cost energy and harvest resources like SCVs but have a timed life), and can cast Calldown Extra Supplies and Scanner Sweep. MULEs will be able to harvest a "generous amount" more than 
100 during their duration, making them more cost effective than Calldown Extra Supplies. Calldown Extra Supplies can still be useful to get a quick jump on the supply cap.
Lore
After the Brood War, the increasing use of command centers in combat zones led to the development of standard schematics for upgrading them to a dedicated military role. The orbital command upgrade allows space assets to better assist ground forces. Structures similar to orbital commands and planetary fortresses were in use by the Kel-Morian Combine by 2502.
Produces
Abilities
| Calldown: MULE (E) [edit]
|
| Energy cost
|  50
|
| Cast time
|  6
|
| Duration
| 90
|
| Used by | Orbital Command
|
| Drops in a MULE via a drop pod to any target visible location.
|
| Scanner Sweep (C) [edit]
|
| Effect Radius
| 13
|
| Energy cost
| 50
|
| Duration
| 12
|
| Used by | Orbital Command
|
| Scanner Sweep allows you to see a target location on the map temporarily, granting detection and revealing cloaked units.
|
Upgrades
Screenshots
History
The Orbital Command replaces the Surveillance Station, which was similar to the Orbital Command, but only gained the Scanner Sweep ability.
