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Management, 452-ICD-SN/CSM (formerly 451-ICD-NCCDS/MOCC). State vectors are
transmitted to the NCCDS on a regular basis with vector epochs spaced at FDF
determined intervals. A 2-day projection for each customer is available daily. The
IIRVs are updated by the FDF in order to maintain the prediction accuracy required for
S-band, Ku-band, and Ka-band services. The FDF also supplies IIRVs for the TDRSs
and for permanent Earth stations.
NOTE:
MOCCs can provide the NCCDS with the IIRVs for their
customer platforms rather than having the FDF perform this
function for them.
NOTE:
The NCCDS has the capability to receive IIRVs sent via File
Transfer Protocol (FTP) in addition to the capability to
receive IIRVs sent via formatted message.
10.2.5.4 BRTS Scheduling
Generic scheduling of the BRTSs is performed by the NCCDS with the resultant
schedule transmitted to the FDF. The FDF plans for, and requests scheduling of, BRTS
calibrations and special TDRSS test events.
10.2.6 GT/NCCDS Scheduling Interface
10.2.6.1 General
The types of data exchanged between the NCCDS and the GTs are shown in Figure
10-4. The data transfers relevant to the scheduling process are discussed in
paragraphs 10.2.6.2 through 10.2.6.4. OPMs, TDRSS Service Level Reports (SLRs),
and Operations Data Messages (ODMs) are discussed in paragraph 10.3. Refer to
Table 10-12 for further information on the real-time message flow between the NCCDS
and GT.
Revision 10 10-20 450-SNUG