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MISSION PLAN - PDS Small Bodies Node

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It is important to note that, other than the parachute mortar gas cartridge, the SRC does<br />

not contain any explosive ordinance (no pyros, rocket motor, etc).<br />

Once located, the SRC will be transported to a staging area at UTTR for extraction of the<br />

sample canister. The sample canister will then be transported to the final destination, the<br />

planetary material curatorial facility at JSC.<br />

Military Operations Area<br />

Special Use<br />

Airspace<br />

Posigrade<br />

7.3 Mission Operations<br />

Figure 7.2-3 Posigrade Landing Footprint<br />

Mission operations resources for the Earth Return phase are summarized in Table 7.3-1.<br />

Key to this phase is the accurate execution of terminal navigation for successful delivery<br />

of the SRC to the target interface point. TCMs scheduled at E-13 days and E-1 day,<br />

together with extensive DSN tracking are used to achieve this goal.<br />

Table 7.3-1 Earth Return Phase Mission Operations<br />

Mission Operation Description<br />

Communications Return - 16 hrs /day, within ER-14 days<br />

All MGA, exc.<br />

LGA: > L+2508<br />

TCMs - Two - 4 hr passes week, -14 to -28, +14 to +28d<br />

4 hrs / day, within ± 14 days<br />

Navigation L+2475 (ER-60 d): TCM 17<br />

L+2522 (ER-13 d): TCM 18<br />

L+2533 (ER-1 d): TCM 19<br />

L+2534 (divert): TCM 20<br />

Spacecraft Attitude Time (days) Description angz (°) angy (°) db (°)<br />

(see section 10 for L+2445 to 2459 constant off-sun 0 0 15<br />

attitude mode L+2459 to 2489 constant off-sun 0 180 15<br />

definitions) L+2489 to 2509 constant off-sun -21 180 15<br />

L+2509 to 2533 constant off-sun 45 0 15<br />

L+2533 to 2535 constant off-sun 26 0 15<br />

88

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