Operational Interface Procedures for the South Pole TDRSS Relay ...
Operational Interface Procedures for the South Pole TDRSS Relay ...
Operational Interface Procedures for the South Pole TDRSS Relay ...
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6.1 Scheduling<br />
6.1.1 Purpose<br />
Section 6. Scheduling <strong>Procedures</strong><br />
This procedure describes <strong>the</strong> method to schedule view periods <strong>for</strong> user data transfer.<br />
6.1.2 Participants<br />
a. SPTR.<br />
b. NCC.<br />
1. SO.<br />
2. FA.<br />
3. Forecast Scheduler<br />
4. Real-time Scheduler<br />
c. FDF.<br />
d. WSC.<br />
6.1.3 Procedure<br />
6.1.3.1 General<br />
User data transfer via SPTR is scheduled via TDRS view periods supplied by FDF. A SPTR<br />
schedule containing two weeks of TDRS view periods will be coordinated and transmitted each<br />
week by <strong>the</strong> NCC.<br />
6.1.3.2 SPTR Priority<br />
Currently, TRDS-1 at 49 degrees W longitude provides ELV launch support, SN user spacecraft<br />
emergency support, SN user critical support, and occasional overflow of SN user normal support<br />
during STS missions. There are also daily BRTS events to maintain <strong>the</strong> TDRS-1 state vector.<br />
The daily SPTR communication times will have a priority just below normal SN user support.<br />
NCC scheduling is instructed to make every ef<strong>for</strong>t not to preempt <strong>the</strong> limited daily SPTR view<br />
periods. Any times relinquished <strong>for</strong> high priority activities will be reflected in <strong>the</strong> SPTR Schedule.<br />
6.1.3.3 Schedule Preparation and Dissemination<br />
View periods <strong>for</strong> an upcoming two week period are prepared by FDF and placed on <strong>the</strong> FDF<br />
product server web site at http://fdd.gsfc.nasa.gov/FDD_products.html. The Forecast Scheduler<br />
a2302s6 6-1 532-OIP-NCC/SPTR
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