OLSG Report_Final_06_05_12 - Interagency Operations Advisory ...

Optical Link Study Group (OLSG) Final Report
IOAG.T.OLSG.2012.V1
that the portion of Figure 49 for which the SEP angle is small is shown in Figure 50. Figure
50 shows the time when the optical communications system is not downlinking because the
SEP is less than 5 degrees, while the Ka-band is still downlinking down to an SEP of 1 degree.
The data volume difference due to this longer optical communication outage is small, given
that it occurs at the farthest range with the lowest data rates. When the results of a CFLOS
analysis are considered and multiple receive stations are incorporated, as discussed above,
this data return can be increased substantially.
Figure 48: Data rate vs. distance at GDSCC.
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