Take five.

DEG 3 TTN SOLID ROCKET BOOSTER RECOVERY ....... 6-38 Solid Rocket Boosters (SRB’s). In addition, the astronauts can initiate SRB/ET separation whether or not the satellite Ku-band signal. 4-56 S-band payload interrogator Transmitter - 15.0034 GHz Receiver - 2200.0 to 2300.875 MHz 828 channels: 2 kbps.