Common Spacecraft Bus for Earth Science Decadal Survey Missions

Details Common Spacecraft Bus for Earth Science Decadal Survey Missions Common Spacecraft Bus for Earth Science Decadal Survey Missions

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmep21a0725c&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #EP21A-0725

Astronomy and Astrophysics

Astrophysics

[1600] Global Change, [1694] Global Change / Instruments And Techniques, [1699] Global Change / General Or Miscellaneous

Scientific paper

Our study assessed the overall technical and programmatic viability of a Common Spacecraft Bus (CSB) approach that could satify the requirements of multiple Earth Science Decadal Mission programs resulting in cost and schedule savings over individual programs. Our approach developed a Common Payload Interface (CPIF) concept based on assessment of TIER I mission requirements to enable flexibility to the payloads while maintaining maximum commonality in the bus design. Satellite missions in Tier 1 of the Decadal Survey are missions with a launch period beginning in 2014. Four missions are planned and will measure climate change by examining solar and earth radiation, soil moisture and freeze/thaw cycles, ice sheet height differences, surface and ice sheet deformation from natural hazards, and vegetation structure (SMAP, ICESat-2, CLARREO, and DESDynI). Our study goals and objectives were: Develop a Common Spacecraft Bus (CSB) that incorporates the defined CPIF that can be configured to meet the individual Tier I mission specific requirements with minimal impacts or changes; Develop a efficient Assembly, Integration and Test (AI&T) flow and program schedule that can accommodate multiple Observatory level spacecraft processing and provide the flexibility to respond to program changes and other schedule perturbations; Develop a ROM cost for the CSB program approach, based on the reference design and schedules; Evaluate the CSB capability to host payloads of opportunity on the Tier I spacecraft; Evaluate the CSB capability to host the Tier II missions and what changes are required from the Tier I CSB We concluded: CSB approach for Tier I missions is feasible with very good synergy; Program Execution and AI&T approaches can be defined to take maximum advantage of CSB program approach and meet required launch readiness dates; ROM cost analysis indicates that a CSB approach is viable and offers substantial savings over separate procurements The Common Spacecraft Bus Architecture has flexibility, resources and capabilities to support beyond the Tier I Missions. There is additional CSB capability that could accommodate Payloads of Opportunity (PLO’s) on the Tier I missions - Complex Tier I operational, pointing, and field of view constraints indicate that PLO’s will need to be mostly passive and have limited additional constraints - Need to be cautious that PLO modifications for individual missions do not move away from the CSB approach; The CSB architecture has the capability to support two of the five Tier II missions; The CSB can be adapted to other LEO missions besides the Earth Science TIER I and II missions (space weather, helio/astrophysics, surveillance, etc.)

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