Falcon 1 User's Guide - Rev 7 - FOIA and eLibrary website! - Nasa

Falcon 1 User’s Guide ‐ D000973 Rev. 7 Page | 30
3.4.4.5. RF ENVIRONMENT
Payload customers must ensure that spacecraft materials or components sensitive to an RF environment are
compatible with both the launch pad environment and the RF environment during flight.
The Falcon 1 fairing attenuates the launch vehicle transmissions during launch pad operations and flight, up to
fairing separation. After fairing separation, the C‐band transmissions will not exceed 3.38 dbm (pulsed) at the
Center of Gravity (CG) of the fairing. The S‐band transmissions at this time will not exceed ‐4.87 dbm (continuous)
at the CG of the fairing. We recommend powering the payload OFF during launch to minimize the risk of
interference and damage to the payload. The spacecraft RF characteristics should be such that there is no
interference with the launch vehicle RF systems listed in Table 3‐10.
TABLE 3‐10: LAUNCH VEHICLE RF SYSTEM CHARACTERISTICS
Source
1 2 3 4 5 6 7
Function Command Tracking Tracking Stg 1 Launch Stg 2 Launch Launch GPS
Destruct Transponder Transponder Vehicle Telem Vehicle Telem Vehicle Video
Role Receive Transmit Receive Transmit Transmit Transmit Receive
Band UHF C‐Band C‐Band S‐Band S‐Band S‐Band L‐Band
Frequency 416.5 5765 5690 2221.5 2213.5 2251.5 1575.42
(MHz) or 425
Bandwidth N/A N/A 14 MHz @ 0.6 MHz @ 1.2 MHz @ 8 MHz @ 3dB 20.46 MHz
3dB
3dB
3dB
Power N/A 400W peak N/A 5W 10W 10W N/A
Output
Sensitivity ‐107 dBm N/A ‐70 dBm N/A N/A N/A N/A
Modulation Tone Pulse Code Pulse Code PCM/FM PCM/FM FM/FM PRN Code
FIGURE 3‐8: FALCON 1 WORST CASE RADIATED ENVIRONMENT
Copyright –2008