FLIGHT 12A

P3/P4 Truss Segments

The following is a summary of the events occurring on this flight:

Rendezvous of the Orbiter with the Space Station occurs along the + V-bar at an altitude of 215 nmi.
Flight 12A delivers ITA P3, PV module P4 and 2 Unpressurized Logistics Carriers Attach Systems.
The P3/P4 truss segments are attached to the port side of truss segment P1.
The major component of the P3 truss segment is the solar alpha rotary joint. Segment P3 accommodates solar tracking in support of ISSA photo-voltaic power system. It provides accommodation for 2 unpressurized logistics carriers and attached payloads.
The P4 PV module is the third of four U.S. solar array based power sources. P4 provides the photo voltaic power system, storage batteries and related avionics.
P3/P4 segments are approximately 45.3 feet long.