READ ME File For PhD Data



Dataset DOI:  10.5258/SOTON/D3136



ReadMe Author: Liam Tope, University of Southampton 


This dataset supports the thesis entitled Computational Modelling of Nonlinear Infrasound Propagation in the Atmosphere
AWARDED BY: Univeristy of Southampton

DATE OF AWARD: 2024



DESCRIPTION OF THE DATA

All of the datafiles in the compressed folders are binary files containing two columns of 8 byte floating point values. Accordingly, the values of the first column are every other value starting from the first value. Similarly, the second column is made up of every other value starting from the second value. The physical properties contained in each column vary between different chapters and are outlined below. There are also subfolders for different source amplitudes and, for certain zipped folder, different atmospheres. These subfolders are intuitively names so are no discussed in great detail in this document.


This dataset contains:


Chapter3_stratospheric_ducting.zip -> Column values: simulation time (s), and acoustic pressure (Pa) of remotely detected signals at ranges 0-600 km. Each file pertains to one of these ranges.
These remote signals correspond to the results in Chapter 3 of the thesis with stratospheric ducting only.

Chapter3_thermospheric_ducting.zip -> Column values: simulation time (s), and acoustic pressure (Pa) of remotely detected signals at ranges 0-600 km. Each file pertains to one of these ranges.
These remote signals correspond to the results in Chapter 3 of the thesis with thermospheric ducting only.

Chapter3_stratospheric_and_thermospheric_ducting.zip -> Column values: simulation time (s), and acoustic pressure (Pa) of remotely detected signals at ranges 0-600 km. Each file pertains to one of these ranges. These remote signals correspond to the results in Chapter 3 of the thesis with both stratospheric and thermospheric ducting.

Chapter_4_atmospheres_0-1.zip -> Column values: frequency (Hz), and transfer function Psi (dimensionless) of remotely detected signals at ranges 0-600 km. Each file pertains to one of these ranges. These transfer functions correspond to the results in Chapter 4 of the thesis with atmospheres Theta_i, i=[0,1].

Chapter_4_atmospheres_2-3.zip -> Column values: frequency (Hz), and transfer function Psi (dimensionless) of remotely detected signals at ranges 0-600 km. Each file pertains to one of these ranges. These transfer functions correspond to the results in Chapter 4 of the thesis with atmospheres Theta_i, i=[2,3].

Chapter_4_atmospheres_4-5.zip -> Column values: frequency (Hz), and transfer function Psi (dimensionless) of remotely detected signals at ranges 0-600 km. Each file pertains to one of these ranges. These transfer functions correspond to the results in Chapter 4 of the thesis with atmospheres Theta_i, i=[4,5].

Chapter_4_atmospheres_6-7.zip -> Column values: frequency (Hz), and transfer function Psi (dimensionless) of remotely detected signals at ranges 0-600 km. Each file pertains to one of these ranges. These transfer functions correspond to the results in Chapter 4 of the thesis with atmospheres Theta_i, i=[6,7].

Chapter_5_Small_Negative_Wind.zip -> Column values: frequency (Hz), and transfer function Psi (dimensionless) of remotely detected signals at ranges 0-600 km. Each file pertains to one of these ranges. These transfer functions correspond to the results in Chapter 5 of the thesis with the weakest wind jet speed, for negative winds and the analogous no-wind atmosphere.

Chapter_5_Small_Positive_Wind.zip -> Column values: frequency (Hz), and transfer function Psi (dimensionless) of remotely detected signals at ranges 0-600 km. Each file pertains to one of these ranges. These transfer functions correspond to the results in Chapter 5 of the thesis with the weakest wind jet speed, for positive winds and the analogous no-wind atmosphere.

Chapter_5_Medium_Negative_Wind.zip -> Column values: frequency (Hz), and transfer function Psi (dimensionless) of remotely detected signals at ranges 0-600 km. Each file pertains to one of these ranges. These transfer functions correspond to the results in Chapter 5 of the thesis with the median wind jet speed, for negative winds and the analogous no-wind atmosphere.

Chapter_5_Medium_Positive_Wind.zip -> Column values: frequency (Hz), and transfer function Psi (dimensionless) of remotely detected signals at ranges 0-600 km. Each file pertains to one of these ranges. These transfer functions correspond to the results in Chapter 5 of the thesis with the median wind jet speed, for positive winds and the analogous no-wind atmosphere.

Chapter_5_Large_Negative_Wind.zip -> Column values: frequency (Hz), and transfer function Psi (dimensionless) of remotely detected signals at ranges 0-600 km. Each file pertains to one of these ranges. These transfer functions correspond to the results in Chapter 5 of the thesis with the largest wind jet speed, for negative winds and the analogous no-wind atmosphere.

Chapter_5_Large_Positive_Wind.zip -> Column values: frequency (Hz), and transfer function Psi (dimensionless) of remotely detected signals at ranges 0-600 km. Each file pertains to one of these ranges. These transfer functions correspond to the results in Chapter 5 of the thesis with the largest wind jet speed, for positive winds and the analogous no-wind atmosphere.




Licence:

CC-BY


Funders:
EPSRC & AWE

Related publications:
Liam J. Tope, Jae Wook Kim, Peter Spence; Direct numerical simulations of long-range infrasound propagation: Implications for source spectra estimation. J. Acoust. Soc. Am. 1 January 2024; 155 (1): 465–478. https://doi.org/10.1121/10.0024338

Tope, L.J., Kim, J.W. and Spence, P., 2022. Direct Numerical Simulations of Nonlinear Infrasound Propagation in the Atmosphere. In 28th AIAA/CEAS Aeroacoustics 2022 Conference (p. 3062)



Date that the file was created: June, 2024