User Guides for Noise Modeling of Commercial Space Operations—RUMBLE and PCBoom (2018) / Chapter Skim
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P A R T I RUMBLE Launch Vehicle Acoustic Simulation Model Version 2.0 User Guide Michael M James Alexandria R
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9 Chapter 2 Introduction to RUMBLE 9 2.1 About RUMBLE 9 2.2 About this User Guide 11 Chapter 3 Technical Reference 11 3.1 Source 14 3.2 Propagation 15 3.3 Receiver 16 Chapter 4 System and Installation 16 4.1 System Requirements 16 4.2 Installation Package Contents 17 4.3 Software Installation 22 Chapter 5 Noise Metrics 22 5.1 Maximum Sound Level 22 5.2 Maximum A-weighted Sound Level 23 5.3 Sound Exposure Level 23 5.4 Day-Night Average Sound Level 23 5.5 Community Noise Equivalent Level 24 Chapter 6 Input File Descriptions 24 6.1 Fleet Input Format 25 6.2 Trajectory Input Format 26 6.3 Atmospheric Profile Input Format 27 Chapter 7 Program Operation 27 7.1 Getting Started 28 7.2 User Interface Navigation 29 7.3 Workspace 29 7.4 Study Tab 34 7.5 Spaceport Tab 34 7.6 Receptors Tab 37 7.7 Operations Tab 39 7.8 Scenarios Tab 43 7.9 Metric Results Tab 48 Chapter 8 Output File Descriptions 48 8.1 RUMBLE Grid File 48 8.2 RUMBLE Log File 50 Chapter 9 Error and Warning Messages 53 Chapter 10 Instructional Resources 53 10.1 Sample Cases 57 10.2 Create New Study Exercise C O N T E N T S
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67 Chapter 11 Approval Process 67 11.1 Procedures for Review of Non-Default Methods and Data 68 11.2 List of Common Methods/Data and AEE Review Requirements 69 11.3 Guidance Regarding a Request to Use Non-Default Methods/Data 71 Chapter 12 RSIF Reference Guide 71 12.1 Introduction 71 12.2 XML Hierarchy 72 12.3 RSIF Examples 73 12.4 Notation 74 12.5 Element Descriptions 90 12.6 Group Descriptions 92 12.7 Complex Type Descriptions 103 12.8 Simple Type Descriptions 106 References 107 Abbreviations
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9 2.1 About RUMBLE The launch vehicle acoustic simulation model, RUMBLE, is a software system designed to model commercial space launch, reentry, and static operations in space and time to compute far-field community noise exposure. A primary objective of RUMBLE is to help the analyst efficiently answer questions of interest about the environmental consequences of aviation activities.
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10 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLE and pCBoom The following symbols will appear throughout this document to highlight important information: Warnings to avoid errors in execution and ensure that the intended execution occurs. Notes containing helpful information and tips regarding the functionality of the tool.
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11 The RUMBLE noise modeling methodology was developed to produce accurate acoustic estimates relevant to environmental analysis of commercial space operations. The model is applicable to inflight and static operations of vertical and horizontal launch vehicles.
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12 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom 3.1.1 Acoustic Power Eldred's Distributed Source Method 1 (DSM-1)
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technical reference 13 thrust [1]
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14 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom the nozzle exhaust flows in the direction of 0°. These updated DI are included in the model.
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technical reference 15 3.2.2 Atmospheric Absorption Atmospheric absorption arises from the excitation of vibration modes of air molecules. Atmospheric absorption is a function of temperature, pressure, and relative humidity of the air.
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16 This section provides detailed instructions for installing and running RUMBLE 2.0. Installation components must run locally.
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System and Installation 17 To edit environment variables for MATLAB Runtime: 1. Navigate to Start, Control Panel, System and Security and select System.
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18 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom Figure 8. RUMBLE install wizard – welcome.
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System and Installation 19 Figure 10. RUMBLE install wizard – folder selection.
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20 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom Figure 12. RUMBLE install wizard – ready to install.
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System and Installation 21 4.3.2 Steps to Uninstall RUMBLE To uninstall RUMBLE: 1. Navigate to Start, Control Panel, and select Uninstall a program.
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22 Noise metrics are used to describe the noise event and to identify any potential impacts to receptors within the environment. These metrics are based on the nature of the event and who or what is affected by the sound.
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Noise Metrics 23 5.3 Sound Exposure Level SEL is a logarithmic measure of the total acoustic energy transmitted to the listener during the event. However, SEL does not directly represent the sound level heard at any given time.
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24 RSIF provides a standard file format to allow for the import of data into a RUMBLE study. A detailed description of the RSIF format for the RSIF schema is provided in Chapter 12.
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Input File Descriptions 25 |
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26 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom 6.3 Atmospheric Profile Input Format The atmospheric profile input data describes the user-defined atmospheric profile(s) associated with the study.
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27 This chapter provides instruction on how to interact with the RUMBLE 2.0 application. It is organized according to the order in which the tabs appear in the RUMBLE application, from left to right.
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28 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom 7.2 User Interface Navigation The RUMBLE 2.0 graphical interface consists of three main components (Figure 16)
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program Operation 29 Spaceports Tab The Spaceports tab supports adding a spaceport. See Section 7.5 for more information.
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30 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom The sample studies contain different data sets and highlight different features of RUMBLE. Refer to Section 10.1 for a detailed description of the content included in the two sample studies.
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Figure 18. Study tab Import panel.
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32 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom 7.4.4 Save Study To close the currently open study, click the Study tab then click Save from the Actions ribbon group. 7.4.5 Close Study To close the currently open study, click the Study tab then click Close from the Actions ribbon group.
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program Operation 33 7.4.7 Help & About To view version information, click on the Study tab then click Help & About (Figure 21)
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34 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom 7.5 Spaceport Tab The Spaceport tab supports adding a spaceport. 7.5.1 Add Spaceport To add a spaceport: 1.
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program Operation 35 7.6.1 Point-Type Receptor To create a point-type receptor: 1. Click on the Receptors tab and click New, or select an existing receptor from the Table of Receptors and click Copy in the Actions ribbon group to create a new receptor from an existing receptor.
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36 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom 7.6.2 Grid-Type Receptor To create a grid-type receptor: 1. Click on the Receptors tab and click New, or select an existing receptor from the Table of Receptors and click Copy in the Actions ribbon group to create a new receptor from an existing receptor.
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program Operation 37 To edit a grid-type receptor: 1. Select the desired receptor from the Table of Receptors and click Edit in the Actions ribbon group.
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Figure 26. Operations tab – launch details.
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program Operation 39 2. From the Operation Type drop-down menu, select an operation type.
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40 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom Use the buttons in the Actions ribbon group to create, copy, or delete scenarios. • Click New to enable the Scenario Details work area.
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Figure 28. Scenarios tab – assign existing operation group(s)
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42 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom 4. Click the Add Arrow to add the selected operation(s)
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program Operation 43 7.8.2 Copy Scenario The Copy option allows users to create a new scenario based on an existing scenario. To copy a scenario: 1.
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44 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom 7.9.2 Copy Metric Results The Copy option allows users to create a new metric result based on an existing metric result. To copy a metric result: 1.
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program Operation 45 7.9.5 Export Metric Results To enable the Export button, select a completed noise metric result. This button allows the user to export the selected noise metric result in a Noise Model ASCII Grid Format (NMAGF)
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46 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom Figure 32. Metric results tab – view contours.
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program Operation 47 Figure 33. Metric results tab – view receptors.
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48 8.1 RUMBLE Grid File Noise metric results are exported from RUMBLE in the form of Noise Model Grid Format (NMGF) files.
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Output File Descriptions 49 Figure 34. Sample RUMBLE NMGF file.
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50 RUMBLE provides error messages and warnings to inform users of the use of non-standard input or actions which may affect the integrity of the program. RUMBLE provides warning messages to help ensure input data values and formats conform to the model's requirements.
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Figure 36. Sample warning message – invalid value.
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52 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom Figure 38. Sample error message – cannot overwrite default spacecraft.
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53 10.1 Sample Cases Two sample study files are included in RUMBLE 2.0: the Horizontal Launch Sample Case and the Vertical Launch Sample Case. The study files can be accessed via the list of existing studies displayed within the open panel in the RUMBLE GUI's study tab (Figure 39)
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54 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom Figure 39. Sample cases displayed in the list of existing studies.
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Instructional resources 55 Content Name Description Spaceport NASA Shuttle Landing Facility Origin: 28.614894°N, 80.694373°W, 0 ft MSL Receptors SLF 81x81 Grid X Distance: 4.0 nmi (X Count: 81, X Spacing: 0.05) Y Distance: 4.0 nmi (Y Count: 81, Y Spacing: 0.05)
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56 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom Content Name Description Spaceport Launch Complex 39 Origin: 28.627105°N, 80.620880°W, 0 ft MSL Receptors LC-39 101x101 Grid X Distance: 10 nmi (X Count: 101, X Spacing: 0.1) Y Distance: 10 nmi (Y Count: 101, Y Spacing: 0.1)
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Instructional resources 57 10.2 Create New Study Exercise The goal of the Create New Study Exercise is to learn how to create basic study elements in a new study, use those elements to define metric results, and explore the results. The study elements created in this exercise are intended to demonstrate the mechanics of creating a study structure in RUMBLE 2.0 and do not represent a real analysis.
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Figure 42. Create new study work area.
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Instructional resources 59 c. In the Longitude field, enter −80.694373.
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60 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom 10.2.4 Create Spacecraft Operations Follow the steps below to create a launch operation and static fire operation (Figure 45) : Launch Operation 1.
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Instructional resources 61 Static Fire Operation 1. In the Actions ribbon group, click New to open the Operation Details work area (Figure 46)
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62 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom 10.2.5 Create a Scenario In RUMBLE, a scenario is a weighted grouping of operations. Scenarios provide a convenient way to evaluate the noise with different weightings of individual operation groups.
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Instructional resources 63 c. In the Add New Group field, enter "SLF Static Fire Op Group" and click Add.
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Figure 49. Scenario details work area – assign weighting step.
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Instructional resources 65 c. From the Receptor(s)
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66 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom Figure 51. View contours figure window.
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67 The FAA Office of Environment and Energy (AEE) has approved models for detailed noise analysis.
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68 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom appendix to an EA, EIS, or study report as part of the NEPA documentation. The format of the review package is described in Section 11.3.
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approval process 69 11.2.2 Analysis Methods/Data that Do Require AEE Review and Approval The following analysis methods or data are recommended to require AEE review and approval: • Sensitivity – Any supplemental noise analysis that involves impacts that are likely to be highly controversial on environmental grounds. – Any supplemental noise analysis that involves Section 4(f)
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70 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom – Engine � Model and Manufacture � Number of Engines � Number of Nozzles per Engine � Engine Nozzle Exit Diameter (feet) � Engine Nozzle Exit Velocity (feet/second)
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71 12.1 Introduction RSIF provides a standard file format to allow for the import of data into a RUMBLE study. A RSIF can be used to create new RUMBLE studies and to update existing studies.
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72 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom hierarchical relationship of structural XML elements within the RSIF import file; some elements are optional. 12.2.2 Partial RSIF Import Partial RSIF is used to import specific pieces of data into an existing RUMBLE study.
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rSIF reference Guide 73 12.4 Notation This section describes the notation used in the schema. Tables 7 and 8 describe the notation for XML tag types and the notation for the required number of elements.
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74 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom 12.5 Element Descriptions 12.5.1 annualization Contains annualizations. Structure (see Notation for information about reading this table)
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rSIF reference Guide 75 12.5.4 atmosphericProfile Contains one or more atmospheric profile descriptions. Structure (see Notation for information about reading this table)
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76 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom 12.5.7 case Describes general parameters for a case. Structure (see Notation for information about reading this table)
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rSIF reference Guide 77 12.5.9 centroid Describes the geometric center of a polygon. Structure (see Notation for information about reading this table)
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78 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom 12.5.10 grid Describes a grid of points. Structure (see Notation for information about reading this table)
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rSIF reference Guide 79 12.5.11 operation Describes a spacecraft flight operation. Structure (see Notation for information about reading this table)
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80 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom 12.5.13 options Contains default option values applied to the study. Structure (see Notation for information about reading this table)
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rSIF reference Guide 81 12.5.15 polarGrid Describes a two-dimensional grid of individual receptors over an annular sector (polar) of the study area.
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82 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom 12.5.16 polarReceptor Defines receptor points within a polar grid. Structure (see Notation for information about reading this table)
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rSIF reference Guide 83 12.5.17 receptorSet Contains one or more receptor sets at various locations. Structure (see Notation for information about reading this table)
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84 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom 12.5.19 RsifXml Root node of the RSIF tree. Structure (see Notation for information about reading this table)
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rSIF reference Guide 85 12.5.20 scenario Encapsulates a scenario – such as Baseline or Alternative. Structure (see Notation for information about reading this table)
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86 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom Structure (see Notation for information about reading this table)
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rSIF reference Guide 87 12.5.23 trajectoryNode A flight trajectory node.
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88 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom Structure (see Notation for information about reading this table)
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rSIF reference Guide 89 12.5.25 trajectoryOpSet Lists trajectories and associated operations. Structure (see Notation for information about reading this table)
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90 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom 12.6 Group Descriptions 12.6.1 coord2DGroup Indicates how a two-dimensional group is specified. Structure (see Notation for information about reading this table)
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rSIF reference Guide 91 12.6.3 nodeIdGroup A group of nodes. Structure (see Notation for information about reading this table)
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92 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom 12.6.5 utmCoordGroup Specifies a point using Universal Transverse Mercator coordinates. Structure (see Notation for information about reading this table)
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rSIF reference Guide 93 Structure (see Notation for information about reading this table)
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94 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom 12.7.3 boosters This block describes the core's booster(s)
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rSIF reference Guide 95 12.7.5 core This block describes each core. Structure (see Notation for information about reading this table)
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96 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom 12.7.7 directivity This element supports the definition of custom directivities. Structure (see Notation for information about reading this table)
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rSIF reference Guide 97 12.7.10 engine User-defined engine information containing custom parameters that reflect a spacecraft engine. This engine definition can be used within a user-defined spacecraft.
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98 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom 12.7.11 fleet Main block for creating user-defined fleet/spacecraft data. Structure (see Notation for information about reading this table)
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rSIF reference Guide 99 12.7.13 longitudeDecimalType Longitude specified as degrees in decimal format. Can include optional attribute positive (decimal degrees)
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100 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom 12.7.15 spacecraftBooster This block describes each spacecraft booster. Structure (see Notation for information about reading this table)
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rSIF reference Guide 101 12.7.18 spacecraftCores A set of spacecraft cores. Structure (see Notation for information about reading this table)
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102 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom 12.7.20 staticFire Structure (see Notation for information about reading this table)
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rSIF reference Guide 103 12.8 Simple Type Descriptions 12.8.1 airframeModel Refers to an existing airframe model. Attributes: None.
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104 User Guides for Noise Modeling of Commercial Space Operations -- rUMBLe and pCBoom 12.8.10 opType Type of operation. Valid values: Launch, Landing, and Static Fire.
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rSIF reference Guide 105 12.8.19 string64 A string up to 64 characters long. Attributes: None.
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107 AEDT Aviation Environmental Design Tool AEE Office of Environment and Energy AGL Above Ground Level ANSI American National Standards Institute ASIF AEDT Standard Input File AST Office of Commercial Space Transportation BRRC Blue Ridge Research and Consulting, LLC CNEL Community Noise Equivalent Level dB Decibel dBA A-weighted Decibel De Nozzle Diameters DI Directivity Indices DNL Day-Night Average Sound Level DSM-1 Distributed Source Method 1 EA Environmental Assessment EIS Environmental Impact Statement ELV Expendable Launch Vehicle °F Degrees Fahrenheit (temperature) FAA United States Federal Aviation Administration ft Feet (length)
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108 User Guides for Noise Modeling of Commercial Space Operations -- RUMBLE and PCBoom PM Project Manager PS Project Sponsor RLV Reusable Launch Vehicle RSIF RUMBLE Standard Input File RSRM Reusable Solid Rocket Motor s, sec Second (time duration) SEL A-weighted Sound Exposure Level SPL Sound Pressure Level SS2 Space Ship Two U.S.
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