東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

FindBook

Google Book

Amazon

博客來

Meteorological Reanalysis Data Inputs for Improved Aviation Noise Modeling.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Meteorological Reanalysis Data Inputs for Improved Aviation Noise Modeling./
作者:	Romond, Rachel A.
面頁冊數:	1 online resource (324 pages)
附註:	Source: Dissertations Abstracts International, Volume: 83-06, Section: B.
Contained By:	Dissertations Abstracts International83-06B.
標題:	Aerospace engineering. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28929398click for full text (PQDT)
ISBN:	9798494498663

Meteorological Reanalysis Data Inputs for Improved Aviation Noise Modeling.
Romond, Rachel A.

Meteorological Reanalysis Data Inputs for Improved Aviation Noise Modeling. - 1 online resource (324 pages)

Source: Dissertations Abstracts International, Volume: 83-06, Section: B.

Thesis (Ph.D.)--The Pennsylvania State University, 2021.

Includes bibliographical references

To improve the prediction capabilities of aviation noise modeling tools, recent work has focused on including the vertical structure of the inhomogeneous propagation environment. Vertical profiles of interest are temperature, pressure, humidity, wind speed, and wind direction. Previous studies have used profiles from atmospheric soundings, which are limited to the time and place at which the measurements were made. If profiles are not available for a given location, assumptions must be made about the atmospheric structure. In addition, propagation modeling based on individual soundings or standard profile assumptions may be misinterpreted to imply a simple and/or unchanging atmosphere in cases where the actual atmosphere has much greater spatial and temporal variability.An alternate source of atmospheric data is meteorological reanalysis. Reanalysis feeds quality-controlled measurements from many sources into dynamic meteorological models. These models produce 4-D data fields describing the state of the atmosphere through time. Multiple global and continent-scale reanalysis products are produced and maintained by governmental institutions, and are freely available to the public.In this dissertation, the National Centers for Environmental Prediction (NCEP) Climate Forecast System Reanalysis (CFSR) is considered for use in the calculation of noise propagation from civil aircraft at en-route altitudes to receivers near the ground. Atmospheric profiles are extracted from CFSR data and input to the Advanced En-Route Noise Model (AERNOM) acoustic ray tracing program to show the effects of realistic inhomogeneous atmospheric conditions throughout the propagation path.It is demonstrated that the CFSR 6-hourly analysis product is a feasible data source for atmospheric profiles when calculating sound propagation from in-flight aircraft. Furthermore, calculated sound pressure levels at ground receivers show that realistic vertical profiles are increasingly important as aircraft source altitude increases. The techniques described for CFSR should also be applicable to similar reanalysis products, and would be useful in future development of the Federal Aviation Administration's Aviation Environmental Design Tool (AEDT) for en-route flight altitudes.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798494498663Subjects--Topical Terms:

1002622
Aerospace engineering.
Subjects--Index Terms:

Noise propagation calculationIndex Terms--Genre/Form:

542853
Electronic books.

Meteorological Reanalysis Data Inputs for Improved Aviation Noise Modeling.
LDR:03762nmm a2200409K 4500 001 2354103
005 20230324111159.5
006 m o d
007 cr mn ---uuuuu
008 241011s2021 xx obm 000 0 eng d
020 $a 9798494498663
035 $a (MiAaPQ)AAI28929398
035 $a AAI28929398
040 $a MiAaPQ $b eng $c MiAaPQ $d NTU
100 1 $a Romond, Rachel A. $3 3694446
245 1 0 $a Meteorological Reanalysis Data Inputs for Improved Aviation Noise Modeling.
264 0 $c 2021
300 $a 1 online resource (324 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Dissertations Abstracts International, Volume: 83-06, Section: B.
500 $a Advisor: Sparrow, Victor W.
502 $a Thesis (Ph.D.)--The Pennsylvania State University, 2021.
504 $a Includes bibliographical references
520 $a To improve the prediction capabilities of aviation noise modeling tools, recent work has focused on including the vertical structure of the inhomogeneous propagation environment. Vertical profiles of interest are temperature, pressure, humidity, wind speed, and wind direction. Previous studies have used profiles from atmospheric soundings, which are limited to the time and place at which the measurements were made. If profiles are not available for a given location, assumptions must be made about the atmospheric structure. In addition, propagation modeling based on individual soundings or standard profile assumptions may be misinterpreted to imply a simple and/or unchanging atmosphere in cases where the actual atmosphere has much greater spatial and temporal variability.An alternate source of atmospheric data is meteorological reanalysis. Reanalysis feeds quality-controlled measurements from many sources into dynamic meteorological models. These models produce 4-D data fields describing the state of the atmosphere through time. Multiple global and continent-scale reanalysis products are produced and maintained by governmental institutions, and are freely available to the public.In this dissertation, the National Centers for Environmental Prediction (NCEP) Climate Forecast System Reanalysis (CFSR) is considered for use in the calculation of noise propagation from civil aircraft at en-route altitudes to receivers near the ground. Atmospheric profiles are extracted from CFSR data and input to the Advanced En-Route Noise Model (AERNOM) acoustic ray tracing program to show the effects of realistic inhomogeneous atmospheric conditions throughout the propagation path.It is demonstrated that the CFSR 6-hourly analysis product is a feasible data source for atmospheric profiles when calculating sound propagation from in-flight aircraft. Furthermore, calculated sound pressure levels at ground receivers show that realistic vertical profiles are increasingly important as aircraft source altitude increases. The techniques described for CFSR should also be applicable to similar reanalysis products, and would be useful in future development of the Federal Aviation Administration's Aviation Environmental Design Tool (AEDT) for en-route flight altitudes.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2023
538 $a Mode of access: World Wide Web
650 4 $a Aerospace engineering. $3 1002622
650 4 $a Acoustics. $3 879105
650 4 $a Atmospheric sciences. $3 3168354
653 $a Noise propagation calculation
653 $a Climate Forecast System Reanalysis
653 $a National Centers for Environmental Prediction
653 $a Civil aircraft
653 $a Atmospheric profiles
653 $a En-route noise model
655 7 $a Electronic books. $2 lcsh $3 542853
690 $a 0986
690 $a 0538
690 $a 0725
710 2 $a ProQuest Information and Learning Co. $3 783688
710 2 $a The Pennsylvania State University. $3 699896
773 0 $t Dissertations Abstracts International $g 83-06B.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28929398 $z click for full text (PQDT)