Labels:text | sketch | drawing | diagram | black and white OCR: 13 UHF communication from MCC is through a UHF ground site and Goddard Space Flight Center (GSFC), central facility for NASA ground sites. can't x mite rev at same UPLINK : CARRIES VOICE ( ONLY) time. FROM MCC TO SIMPLEX * THE ORBITER. 259.7 MHZ 296.8 backup FOR UPLINK IN THE SIMPLEX MODE, THE ORBITER RECEIVES UHF BUT CANNOT TRANSMIT WHILE RECEIVING. THE TRANSMITTER 15 VOICE TEMPORARILY INHIBITTED . GS F ( UHF ( some have sats, GSTON SITE some have ground lines) MCC * SEE APPENDIX A FOR A DEFINITION