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https://hdl.handle.net/11681/32009Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Wilson, D. Keith. | - |
| dc.contributor.author | Alter, Ross E. | - |
| dc.contributor.author | Burch, Katrina M. | - |
| dc.contributor.author | Swearingen, Michelle E. | - |
| dc.date.accessioned | 2019-02-05T19:44:32Z | - |
| dc.date.available | 2019-02-05T19:44:32Z | - |
| dc.date.issued | 2019-01 | - |
| dc.identifier.govdoc | ERDC TR-19-1 | - |
| dc.identifier.uri | http://hdl.handle.net/11681/32009 | - |
| dc.identifier.uri | http://dx.doi.org/10.21079/11681/32009 | - |
| dc.description | Technical Report | - |
| dc.description.abstract | EASEE (Environmental Awareness for Sensor and Emitter Employment) is a Java-based software framework for modeling the impacts of the weather and terrain on signal propagation and sensor performance. EASEE includes extensive capabilities for representing the environment (atmosphere, land cover, terrain elevation, and soil properties), along with many different models related to acoustic, optical, radio frequency, and seismic signals. This report describes how to run EASEE from MATLAB, which is a popular software package for performing numerical calculations and displaying graphics. For this purpose, a simple installation configuration and MATLAB script were devised to set up and initialize EASEE. The focus of the report is on using EASEE for acoustic propagation calculations, which is its most mature signal modality. The report describes two general approaches to performing acoustical calculations in EASEE: one that involves using EASEE for its environmental representation only and then running the acoustic propagation calculation using a MATLAB toolbox and a second that uses EASEE for both its environmental layer and the acoustical calculation. Overall, this report shows that the MATLAB user interface provides convenient access to EASEE’s powerful signal modeling capabilities. | en_US |
| dc.description.sponsorship | United States. Office of the Assistant Secretary of the Army for Acquisition, Logistics, and Technology. | en_US |
| dc.description.tableofcontents | Abstract .......................................................................................................................................................... ii Figures and Tables ......................................................................................................................................... v Preface ............................................................................................................................................................ vi Acronyms and Abbreviations .....................................................................................................................vii 1 Introduction ............................................................................................................................................ 1 1.1 Background ..................................................................................................................... 1 1.1.1 What is EASEE? ............................................................................................................... 1 1.1.2 EASEE software design and capabilities ....................................................................... 2 1.2 Objective .......................................................................................................................... 3 1.3 Approach ......................................................................................................................... 4 2 Preliminaries .......................................................................................................................................... 5 2.1 Installing the EASEE files ................................................................................................ 5 2.2 Changing the MATLAB JVM to Java 8 ............................................................................. 5 3 Running EASEE ...................................................................................................................................... 7 3.1 Getting started ................................................................................................................ 7 3.2 Verifying the installation ................................................................................................. 8 3.3 Simple example .............................................................................................................. 8 3.4 Some useful background ............................................................................................. 10 3.4.1 A very brief introduction to Java ................................................................................... 10 3.4.2 Running Java from MATLAB ......................................................................................... 11 3.4.3 Importing packages and classes .................................................................................. 12 3.4.4 Conversion of data types .............................................................................................. 14 3.4.5 The MATLAB disp command ......................................................................................... 16 3.4.6 Java enumerations and inner classes ......................................................................... 16 4 Geographic Coordinates, Grids, and Elevation Maps .................................................................. 21 4.1 Geographic coordinates ............................................................................................... 21 4.2 Geographic grids ........................................................................................................... 23 4.3 Digital elevation, surface, land cover, and soil grids .................................................. 24 5 Environmental Representations ...................................................................................................... 27 5.1 Atmospheric constants and conversions .................................................................... 29 5.2 Environmental components ......................................................................................... 30 5.2.1 Humid air representation.............................................................................................. 31 5.2.2 Solid-earth representation ............................................................................................ 32 5.2.3 Land cover representation ........................................................................................... 34 5.2.4 Soil representation ........................................................................................................ 36 5.2.5 Snow representation ..................................................................................................... 37 5.2.6 Atmospheric surface layer ............................................................................................ 38 5.2.7 Atmospheric vertical profiles ........................................................................................ 41 5.2.8 Clouds ............................................................................................................................ 45 5.2.9 Seismic vertical profiles ................................................................................................ 46 5.3 Environmental representations.................................................................................... 48 5.3.1 Homogeneous environment ......................................................................................... 48 5.3.2 Vertical profile environment ......................................................................................... 52 5.4 Loading WRF Data ........................................................................................................ 55 5.4.1 Single WRF Output File ................................................................................................. 55 5.4.2 Multiple WRF output files.............................................................................................. 60 6 Acoustic Propagation Calculations ................................................................................................. 66 6.1 Standard acoustic frequencies .................................................................................... 66 6.2 AcousticMedium class .................................................................................................. 67 6.3 Calculation grids ........................................................................................................... 70 6.4 Impedance-plane model ............................................................................................... 71 6.4.1 Flat ground .................................................................................................................... 71 6.4.2 Uneven ground .............................................................................................................. 75 6.5 Parabolic equation methods ........................................................................................ 78 6.6 BNOISE .......................................................................................................................... 83 6.7 Nord2000 ...................................................................................................................... 83 6.8 MATLAB acoustic propagation interface ...................................................................... 83 7 Full Example Script for Testing EASEE in MATLAB ...................................................................... 88 8 Conclusion ............................................................................................................................................ 93 References ................................................................................................................................................... 94 Report Documentation Page | - |
| dc.format.extent | 106 pages / 2.770 Mb | - |
| dc.format.medium | PDF/A | - |
| dc.language.iso | en_US | en_US |
| dc.publisher | Cold Regions Research and Engineering Laboratory (U.S.) | en_US |
| dc.publisher | Construction Engineering Research Laboratory (U.S.) | en_US |
| dc.publisher | Engineer Research and Development Center (U.S.) | en_US |
| dc.relation.ispartofseries | Technical Report (Engineer Research and Development Center (U.S.)) ; no. ERDC TR-19-1 | - |
| dc.rights | Approved for Public Release; Distribution is Unlimited | - |
| dc.source | This Digital Resource was created in Microsoft Word and Adobe Acrobat | - |
| dc.subject | EASEE (Computer program) | en_US |
| dc.subject | Computer software | en_US |
| dc.subject | Detectors--Environmental aspects | en_US |
| dc.subject | Detectors--Computer simulation | en_US |
| dc.subject | Remote sensing--Atmospheric effects | en_US |
| dc.subject | Digital communications | en_US |
| dc.title | Using EASEE’s acoustical calculations in MATLAB | en_US |
| dc.type | Report | en_US |
| Appears in Collections: | Technical Report | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| ERDC TR-19-1.pdf | 2.84 MB | Adobe PDF |  View/Open |