Management, Cost, and Schedule

Team 3DIOS - Deimos Impact & Observation Spacecraft

Jeff Anderson, Thomas Blachman, Andrew Fallon, John Franklin, Samuel Gaultney,

David Habashy, Brian Hardie, Brandon Hing, Zujia Huang, Sung Kim, Jonathan Saenger

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Mission Concept

Mission Goal: Direct an impactor into Deimos at high velocities to launch a plume of surface and subsurface debris into space. The plume will be analyzed by an infrared spectrometer to determine the composition Deimos. This will determine whether Deimos is a C or D type asteroid, or Mars ejecta. In addition, prebiotic volatile concentrations will be analyzed to determine asteroid contributions to early life.

Mission Objectives:

- The impactor shall collide with Deimos’ surface and generate a plume sufficient enough in size for the CubeSat Spectrometer to detect

- The impactor shall penetrate Deimos’ surface deep enough to expose volatile compounds including oxygen, carbon dioxide, carbon monoxide, water, and ammonia

- The CubeSat shall analyze the plume with a spectrometer and determine the 1.3 µm absorption levels, as well as the absorption levels of volatiles 3

Key Requirements

The two major design goals of the spacecraft are to generate a plume of Deimos subsurface material, and to relay the composition of the material to Earth. The driving requirements serve to fulfill these two goals either directly or secondarily.

1. Shall be ready for launch by July 20th 20202. Shall arrive at Deimos between February 19th 2021 and February 20th 20213. Shall not exceed 5.6 million dollars in total cost4. Shall have an acceptable amount of risk.

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DIOS Work Breakdown Structure Cost Element

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Total Cost Profile

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Cost Estimation Methodology

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Cost Estimation Methodology for DSN

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Project Life Cycle

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System Schedule, Critical Path, Schedule Margin

Pre-Phase A: 1/1/17 - 3/1/17 (2 months)Phase A: 3/2/17 - 7/31/17 (5 months)Phase B: 8/1/17 - 4/1/18 (8 months)Phase C: 4/1/18 - 7/20/19 (15 months)Phase D: 7/21/19 - 7/13/20 (12 months)Phase E: 7/14/20 - 3/31/21 (9 months)Phase F: 4/1/21 - 5/2/21 (1 month)Total: 52 monthsMargin: 8 months

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Project Implementation Flowchart

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Flight Schedule

Significant events during flight

Days Elapsed since Separation Seconds

Separation Date

ΔVi ΔVc + ΔVo Impact Flyby Observe Time

21-Jul 2020 4 208.22667 210.80 210.85 248.72

22-Jul 2020 4 207.22667 209.81 209.86 260.54

23-Jul 2020 4 206.22667 208.82 208.86 257.12

24-Jul 2020 4 205.22667 207.83 207.87 255.70

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Project Risk Areas and Mitigations

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Risk Assessment

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lihoo

dConsequence

1. Propulsion isn’t ready in time of launch

○ If so, we will have to find a new propulsion system.

2. Production schedule surpasses time allotted until launch

○ We have margins built into our production schedule to account for more.

3. Components don’t meet testing standards

○ The schedule margin accounts for fixing

4. Costs are higher than expected

○ Total mission cost with contingency is still the total allocated budget

5. Loss of satellite upon launch

○ Launch Insurance

6. Checks bounce

○ We start paying attention to how we write them.

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Descopes

Reduce the amount of quality testingReduces build time but increases risks

Reduce the amount of employeesReduces salary costs but increases build time

Reduce the amount of trips to conferences and design review tripsReduces costs but reduces centainity of design.

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