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Revision 10 7-26 450-SNUG
Table 7-7. TDRSS KuSA Return Service (cont’d)
Parameter (Note 4) Description (Note 4)
10 -5 Bit Error Rate (notes 2, 3, 4, 8, 12) (cont’d):
Minimum Required P rec (dBW) for Rate 1/2
convolutional encoded channels (note 9)
(cont’d):
DG2
Autotrack (PFOV, and
EEFOV) (note 10)
LEO Program Track
(LEOFOV)
Program Track (PFOV and
EEFOV)
Data rate < 10 Mbps -246.4 + 10log 10 (dr) -243.9 + 10log 10 (dr) -240.4 + 10log 10 (dr)
Data rate > 10 Mbps -245.2 + 10log 10 (dr) -242.7 + 10log 10 (dr) -239.2 + 10log 10 (dr)
Acquisition (notes 5, 8, 12):
Orbital dynamics (free flight) 2
3
R 12 km/sec, R
15 m/sec , jerk .02 m/sec
Total Channel Acquisition Time (assumes the
customer return service signal is present at the
SN ground terminal at the start time of the
return service support period)
Autotrack Acquisition (if applicable):
Minimum Required P rec with probability >
99% (note 9)
Sum of the following:
1. Autotrack acquisition time (when the TDRSS KuSA return service autotrack
mode is enabled)
2. PN (DG1 only) and carrier acquisition time
3. Symbol/Decoder synchronization time (coded channel)
or
Symbol synchronization time (uncoded channel)
PFOV LEOFOV EEFOV (note 10)
>-183.3 dBW or consistent
with the P rec for BER,
whichever is greater
Acquisition Time: < 10 seconds
>-186.8 dBW or
consistent with the P rec
for BER, whichever is
greater
>-183.3 dBW or consistent
with the P rec for BER,
whichever is greater