Please explain in the area below why an STA is necessary:
Approval of this STA will allow timely verification of the spacecrafts command, control, and telemetry sub-system, as well as audio/video communications payload, if any. Orbital does not anticipate any additional coordination to be required, other than those already existing, for the frequency bands of interest. The parameters of the RF transmissions for this STA are provided in the attachment. It should be noted that additional shielding of emissions is expected since testing will be performed inside Orbital structures, shielded rooms, and/or anechoic chambers.
Orbital Sciences manufactures communication and Scientific satellites for commercial and government customers. We must test the Satellite communication systems, both payload and satellite control, to assure that they are fully functional and have been manufactured properly. These are not permanent operations but are temporary and short duration operations.
The following characteristics apply:
Beginning of Life Radio Frequency Parameters for satellite 1 (Dulles, VA):
Frequency Span, Null-Null Bandwidth (GHz) Modulation Type Maximum Effective Radiated Power (ERP)
3.700 - 4.200 Continuous wave (CW) and TDMA (CW) +10 dBW
4.198 - 4.199875 Frequency Shift Keying with Ranging Tones +10 dBW
6.245 - 6425 Continuous wave (CW) +10 dBW
Orbital Sciences is aware that other stations may be licensed on these frequencies, and if any interference occurs, transmissions associated with this application will be immediately terminated.
Beginning of Life Radio Frequency Parameters for satellite 2 (Dulles, VA):
Frequency Span, Null-Null Bandwidth (GHz) Modulation Type Maximum Effective Radiated Power (ERP)
11.69 12.03 Continuous wave (CW) +10 dBW
11.69 11.71 Frequency Shift Keying with Ranging Tones +10 dBW
17.29 17.63 Continuous wave (CW) +10 dBW
Orbital Sciences is aware that other stations may be licensed on these frequencies, and if any interference occurs, transmissions associated with this application will be immediately terminated.
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