RLEP 2 Overview Bart Graham

Information about RLEP 2 Overview Bart Graham

Published on November 13, 2007

Author: Funtoon

Source: authorstream.com

Content

RLEP 2 Mission Overview April 6, 2006 MSFC/GSFC/APL :  RLEP 2 Mission Overview April 6, 2006 MSFC/GSFC/APL Robotic Lunar Exploration Program Mission (RLEP) 2:  Robotic Lunar Exploration Program Mission (RLEP) 2 The Robotic Lunar Exploration Program is a sequence of missions intended to meet objectives which enable a successful human return to the Moon in 2015-2020 Each mission will build upon the strategic knowledge, measurements, discoveries and emplaced infrastructure capabilities provided and enabled by prior missions The RLEP sequence of missions begin with the launch of the Lunar Reconnaissance Orbiter (LRO) mission, which is being developed at GSFC and scheduled for launch in late 2008 The RLEP 2 Mission will build upon the knowledge gained from LRO, and will launch no earlier than 2011 Aligns with the President’s Vision for Space Exploration Architecture Approach:  Architecture Approach The vision and mission of NASA, including our intent to live and work on the Moon by 2020, requires a systems approach to implementation The purpose of RLEP 2 is to obtain strategic knowledge, answer critical questions, and examine the possibility of developing and emplacing assets for eventual use at a lunar outpost, thereby further enabling human exploration Strategic Knowledge: Expeditions to the Lunar Poles:  Strategic Knowledge: Expeditions to the Lunar Poles Successful long-term expeditions into remote areas depend upon locating nearby abundant natural resources needed to sustain life and being able to exploit those resources The lunar poles possess areas of near-permanent sunlight and the most likely deposits of water ice Our understanding of the location and extent of these resources is currently limited Vision for the Future of Lunar Exploration:  Vision for the Future of Lunar Exploration RLEP Architecture Objectives Accomplish U.S. Exploration Architecture mission objectives earlier and with less cost Reduce risk to crew and maximize crew efficiency by focusing crew efforts on those activities requiring human presence and intelligence Provide lunar outpost infrastructure to support crewed operations including resource identification and characterization, ISRU production facilities, and surface power Provide independent cargo resupply through a common lander to support crewed missions (a systems approach) Provide early engineering data on effects of the lunar environment RLEP2 Mission Objectives:  RLEP2 Mission Objectives * As rated by the SKIWG RLEP 2 Pre-Phase A Architecture Development Process:  RLEP 2 Pre-Phase A Architecture Development Process 1. Determine Launch & Transit Approach (trade study) 2. Determine Lander Capability (trade study) 3. Determine Surface Mobility Solution (trade study) 4. Determine Nav. and Comm. Approach (trade study) Baseline Architecture and Alternatives 7. Conduct Technology Assessment to identify cost leverage savings by transitioning to RLEP 2 system development at appropriate time Can Integrated Mission architecture be accomplished within cost constraints? 6. Develop and evaluate Life Cycle Cost and conduct risk and extensibility evaluations for the Integrated Mission Architecture Options 5. Determine RLEP 2 Measurement Plan (Lander and Surface Mobility) Strategic Knowledge & Infrastructure Constraints (Working Group) YES NO RLEP 2 Pre-Phase A Trade Studies & Assessments:  RLEP 2 Pre-Phase A Trade Studies & Assessments Determine Launch and Transit Approach Trade space includes CLV and EELV, and use of existing or planned solid and liquid stages to perform the TLI maneuver. Determine Lander Capability Trade will set the scale (payload mass and volume) to maximize return on lander investment to meet the RLEP 2 and future robotic and crewed mission objectives. Determine Surface Mobility Solution Trade surface mobility solutions to maximize return on investment to meet the RLEP 2 mission objectives and future robotic and crewed mission objectives. Extensibility of the surface mobility solutions to future robotic and crewed missions will be considered. Determine Navigation and Communication Approach Trade will determine the most cost effective methodology of meeting the navigation and communication requirements of the RLEP 2 mission. Extensibility of the RLEP 2 navigation and communication approach to future robotic and crewed missions will be considered. Determine RLEP 2 Measurement Plan (Lander and Surface Mobility) Determine the measurement plan and identify resources (mass, volume, and cost) required to meet RLEP 2 mission objectives. Develop and evaluate life cycle cost, risk, and extensibility of the mission architecture based on results of items 1 thru 5. Conduct technology assessment and identify funding offsets corresponding with results of items 1 thru 5. Slide9:  Crater Rim Exploration Common Lander Configuration Executes precision soft landing capability Delivers mobility solution and supports rim science experiments Additional payload capacity for other contributors (crater rim rover, power infrastructure payloads) Emplaces navigation beacon Crater Floor Exploration Evolvable Mobility Solution Deployed from lander and traverses into crater or hops from site to site Operates autonomously in dark, cold crater environment Executes technologies for future system development RLEP 2 Hardware Architecture Possibilities Mobility Solution Payload Characterize dark, cold trap environment Determine volatiles, sample composition, physical states, quantities, extent Thorough exploration for water Geotechnical study of regolith Crater Rim Exploration Payload Map potential outpost site Characterize constant sunlight Determine geotechnical properties of regolith Radiation/reduced gravity experiments Preliminary Lander Concept Performance Summary:  Preliminary Lander Concept Performance Summary 64/176* kg 363 kg 288 kg 469 kg 1347 kg Landed Payload Low Mid High Guideline Option Falls short of mobility solution goal of 200 kg to surface Falls short of additional payload goal of 500 kg Falls short of additional payload goal of 500 kg Falls short of additional payload goal of 500 kg Falls short of additional payload goal of 1000 kg Meets Guidelines? None None None None 847 kg Room for Guest Payloads 34/146* kg 333 kg 258 kg 439 kg 500 kg Mobility System Accommodated No Yes (200 kg) Yes (200 kg) Yes (200 kg) Yes (200 kg) Relay Satellite Star 37 Star 48 No No No Additional Stage MMH/NTO MMH/NTO MMH/NTO LH2/LOX LH2/LOX Main Propulsion 3580/A401 6560/A551 6560/A551 6560/A551 9615/D4H Launch Mass/LV 5 4 3 2 1 Concept # *Represents hopper option deployed in orbit. Other estimate assume mobility system was flown to surface The Surface Mobility Trade:  The Surface Mobility Trade RLEP 2 Mission Objectives require that samples be taken and measurements be made from a permanently shadowed region of the lunar surface Determine presence, extent, and purity of water and other volatiles in lunar South Pole cold traps. Determine physical environment and lunar regolith geotechnical properties at the crater rim and at the crater floor The reliability and accuracy of ballistic mortars/penetrators and their limited measurement capability make them undesirable. Two teams have been established and working since Nov 28 to provide a comparison of the rover and hopper concept classes to a consistent set of guidelines. Two different approaches Rover team focused on designing a rover around the Measurement Mission Hopper team focused on accommodating the measurement suite (mass and power) on a system whose basic functionality is already set There are three classes of solutions Rovers Hoppers Mortars/Penetrators Pre-Phase A Schedule:  Pre-Phase A Schedule Develop Guidance Package Incorporate Peer Review Findings Pre-Phase A Deliverable Kickoff Develop Peer Review Pkg 2/27 3/7&8 Integrated Options, Cost & Risk Assessment Sample Integrated Option Cost Analyses Exercise Provide technical concepts For 8/9 Architectures Legend Outputs Inputs Complete Forward Work Develop Deliverable Guidance Package Concept Decision Review 4/11 Kickoff 11/28/05 21 28 Dec 5 12 19 26 Jan 2 9 Nov 14 Midterm 1/10/05 Peer Review 3/7&8/06 SKIWG#1 SKIWG#2 2/3 thru 2/17 2/24 11/28 1/9 11/28 12/6 1/11 1/17 1/11 1/13 Technology Assessment to Indicate cost savings based on integrated options 1/11 2/3 11/28 12/6 16 23 30 Feb 6 13 20 27 Mar 6 Other CAM cost inputs 1/17 D. Cooke Letter 1/26/06 13 20 MSFC/GSFC/APL Management Review 4/5 27 Apr 3 10 Develop Integrated Assessment Tools and Approach Evaluate Trade Study Cost Inputs (Provide feedback to Trade teams) Update project input parameters Correlate FOMs to Integrated Assessment Parameters RLEP 2 Additional Center Participation:  RLEP 2 Additional Center Participation Pre-Phase A Center participation dictated by direct and substantial contribution relevant to the five identified trade studies. Industry and academia participation to be determined by individual trade study leads. RLEP 2 Go Forward Plan:  RLEP 2 Go Forward Plan STATUS Project just completed Peer Review and Management Reviews. Concept Decision Review scheduled for next week. Lander, rover, hopper, and relay satellite concepts have been developed, refined, and costed. Multiple architecture concepts have been developed utilizing the four basic architecture components. WORK TO GO Concept Decision Review April 11

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