https://ntrs.nasa.gov/search.jsp?R=20200000867 2020-04-13T19:26:29+00:00Z SLS-SPEC-159 REVISION G National Aeronautics and EFFECTIVE DATE: DECEMBER 11, 2019 Space Administration CROSS-PROGRAM DESIGN SPECIFICATION FOR NATURAL ENVIRONMENTS (DSNE) Approved for Public Release; Distribution is Unlimited The electronic version is the official approved document. Verify this is the correct version before use. Space Launch System (SLS) Program Revision: G Document No: SLS-SPEC-159 Effective Date: December 11, 2019 Page: 2 of 364 Title: Cross-Program Design Specification for Natural Environments (DSNE) HISTORY PAGE Revision Change Effective Status Description No. No. Date Baseline Initial baseline per CECBD SV-02-0004, dated 8/8/12; 8/8/12 (CR SLS-00034) PCN SV00077 Category 1 Applicable Document Assessment per 8/22/13 PCBD SV2-01-0100R1, dated 8/22/13; CR SLS- 00162; PCN SV00305 A Update SLS-SPEC-159, Cross-Program Design 12/18/13 Specification for Natural Environments (DSNE) to Revision A, per JICBD SV2-02-0063, dated 12/18/13; CR SLS-00193; PCN SV00450 B Update SLS-SPEC-159, Cross-Program Design 8/27/14 Specification for Natural Environments (DSNE) to Revision B to close out a forward work item and change specifications due to model and database updates that are being applied by ESD per JICBD SV2-02-0133, dated August 27, 2014; CR SLS- 00293; PCN SV00668 C Revise SLS-SPEC-159, Cross-Program Design 03/25/15 Specification for Natural Environments (DSNE) to Revision C, per JICBD SV2-02-0194, dated March 25, 2015; CR SLS-00370; PCN SV00801 D Revise SLS-SPEC-159, Cross-Program Design 11/4/15 Specification for Natural Environments (DSNE) to Revision D, per JICBD SV2-02-0257, dated November 4, 2015; CR SLS-00407-X; PCN SV00895 E Revise SLS-SPEC-159, Cross-Program Design 07/12/17 Specification for Natural Environments (DSNE), to Revision E per JICBD SV2-02-0476, dated July 12, 2017; CR SLS-00633-X; PCN SV01341 F Revise SLS-SPEC-159, Cross-Program Design 05/08/19 Specification for Natural Environments (DSNE) to Revision F per JICBD SV2-02-0707, dated May 8, 2019; CR SLS-00833-X; PCN SV01922 G Revise SLS-SPEC-159, Cross-Program Design 12/11/19 Specification for Natural Environments (DSNE) to Revision G per JICBD SV2-02-0828, dated Approved for Public Release; Distribution is Unlimited The electronic version is the official approved document. Verify this is the correct version before use. Space Launch System (SLS) Program Revision: G Document No: SLS-SPEC-159 Effective Date: December 11, 2019 Page: 3 of 364 Title: Cross-Program Design Specification for Natural Environments (DSNE) December 11, 2019; CR SLS-00903-X; PCN SV02184 NOTE: Updates to this document, as released by numbered changes (Change XXX), are identified by a black bar on the right margin. Approved for Public Release; Distribution is Unlimited The electronic version is the official approved document. Verify this is the correct version before use. Space Launch System (SLS) Program Revision: G Document No: SLS-SPEC-159 Effective Date: December 11, 2019 Page: 4 of 364 Title: Cross-Program Design Specification for Natural Environments (DSNE) TABLE OF CONTENTS PARAGRAPH PAGE 1.0 INTRODUCTION .............................................................................................................23 1.1 Background ........................................................................................................................23 1.2 Purpose ...............................................................................................................................23 1.3 Scope ..................................................................................................................................23 1.4 Change Authority/Responsibility.......................................................................................25 2.0 DOCUMENTS ...................................................................................................................26 2.1 Applicable Documents, Models, and Data Sets .................................................................26 2.1.1 Applicable Documents .........................................................................................26 2.1.2 Applicable Models/Data Sets ...............................................................................26 3.0 NATURAL ENVIRONMENT SPECIFICATION............................................................28 3.1 Prelaunch – Ground Processing Phases .............................................................................28 3.1.1 Transportation Environments to the Launch Site KSC (Reserved) .....................28 3.1.2 Reserved ...............................................................................................................28 3.1.3 Ground Winds for Transport and Launch Pad Environments ..............................28 3.1.4 Radiant (Thermal) Energy Environment for Ground Ops at KSC .......................37 3.1.5 Air Temperature Environment for Ground Operations at KSC ...........................45 3.1.6 Air Pressure Environment for Ground Operations at KSC ..................................48 3.1.7 Humidity Environment for Ground Operations at KSC .......................................49 3.1.8 Aerosol Environment for Ground Operations at KSC .........................................50 3.1.9 Precipitation Environment for Ground Operations at KSC ..................................52 3.1.10 Flora and Fauna Environment for Ground Operations .........................................53 3.1.11 Lightning Environment for Ground Operations at KSC ......................................53 3.2 Launch Countdown and Earth Ascent Phases ...................................................................54 3.2.1 Ground Winds Environments During Launch ......................................................54 3.2.2 Surface Air Temperature Environment During Launch .......................................58 3.2.3 Surface Air Pressure Environment During Launch ..............................................59 3.2.4 Surface Humidity Environment During Launch ..................................................59 3.2.5 Aloft Wind Environment for Vehicle Ascent .......................................................60 Approved for Public Release; Distribution is Unlimited The electronic version is the official approved document. Verify this is the correct version before use. Space Launch System (SLS) Program Revision: G Document No: SLS-SPEC-159 Effective Date: December 11, 2019 Page: 5 of 364 Title: Cross-Program Design Specification for Natural Environments (DSNE) 3.2.6 Aloft Air Temperature Environment for Vehicle Ascent .....................................66 3.2.7 Aloft Air Pressure Environment for Vehicle Ascent ............................................67 3.2.8 Aloft Air Density Environment for Vehicle Ascent .............................................67 3.2.9 Cloud Environment for Launch ............................................................................68 3.2.10 Rain and Precipitation Environment for Launch ..................................................70 3.2.11 Flora and Fauna Environments during Launch and Ascent .................................71 3.2.12 Natural and Triggered Lightning during Launch and Ascent ..............................72 3.2.13 Ionizing Radiation Environment for Launch, Ascent and Re-entry .....................72 3.3 In-Space Phases .................................................................................................................82 3.3.1 Total Dose ............................................................................................................83 3.3.2 Single Event Effects ...........................................................................................145 3.3.3 Plasma Charging .................................................................................................173 3.3.4 Ionizing Radiation Environment for Crew Exposure .........................................184 3.3.5 Reserved .............................................................................................................189 3.3.6 Meteoroid and Orbital Debris Environment .......................................................189 3.3.7 Earth Gravitational Field ....................................................................................191 3.3.8 Lunar Gravitational Field ...................................................................................191 3.3.9 Thermal Environment for In-Space Hardware ...................................................193 3.3.10 Solar Illumination Environment for In-Space Hardware ...................................200 3.3.11 In-Space Neutral Atmosphere (Thermosphere) Density ....................................202 3.3.12 Geomagnetic Fields (Reserved) .........................................................................203 3.4 Lunar Surface Operational Phases ...................................................................................203 3.4.1 Lunar Surface Geological and Geomorphological Environment .......................204 3.4.2 Lunar Regolith Properties ..................................................................................215 3.4.3 Lunar Surface Plasma Environment ...................................................................245 3.4.4 Lunar Regolith Electrical Properties ..................................................................248 3.4.5 Optical Properties ...............................................................................................254