Modelling and Application of Vertical Refractivity Profile for Cross River State

Egbe Jesam Nna; Ozuomba Simeon; Enyenihi Henry Johnson

doi:doi:10.11648/j.wjap.20170201.13

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Modelling and Application of Vertical Refractivity Profile for Cross River State

Egbe Jesam Nna, Ozuomba Simeon, Enyenihi Henry Johnson

Published in World Journal of Applied Physics (Volume 2, Issue 1)

Received: 31 October 2016 Accepted: 6 January 2017 Published: 28 January 2017

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Abstract

In this paper six months data on primary radioclimatic parameters obtained using Radiosunde lunched by Nigerian Meteorological Agency (NIMET) in Cross River state, Nigeria is used to model the vertical radio refractivity profile. Cross River state is located at 4°57’North in latitude and 8°19'East. For each of the six months, cubic trendline equation is developed to predict the refractivity in the lower atmosphere (where height < 150 m above sea level). The cubic trendline equation can enable the determination of refractivity at any height less than 150m and also point refractivity gradient which requires the refractivity at 0 m and at 65 m above sea level. Sample point refractivity gradient for the month of January was used to demonstrate the application of the vertical refractivity profile models. From the result, the point refractivity gradient of Cross River state is 124.278 N-units in January.

Published in	World Journal of Applied Physics (Volume 2, Issue 1)
DOI	10.11648/j.wjap.20170201.13
Page(s)	19-26
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Radio Refractivity, Refractivity Profile, Refractivity Gradient, Point Refractivity Gradient, Refractivity Index

References

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APA Style

Egbe Jesam Nna, Ozuomba Simeon, Enyenihi Henry Johnson. (2017). Modelling and Application of Vertical Refractivity Profile for Cross River State. World Journal of Applied Physics, 2(1), 19-26. https://doi.org/10.11648/j.wjap.20170201.13

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ACS Style

Egbe Jesam Nna; Ozuomba Simeon; Enyenihi Henry Johnson. Modelling and Application of Vertical Refractivity Profile for Cross River State. World J. Appl. Phys. 2017, 2(1), 19-26. doi: 10.11648/j.wjap.20170201.13

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AMA Style

Egbe Jesam Nna, Ozuomba Simeon, Enyenihi Henry Johnson. Modelling and Application of Vertical Refractivity Profile for Cross River State. World J Appl Phys. 2017;2(1):19-26. doi: 10.11648/j.wjap.20170201.13

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@article{10.11648/j.wjap.20170201.13,
  author = {Egbe Jesam Nna and Ozuomba Simeon and Enyenihi Henry Johnson},
  title = {Modelling and Application of Vertical Refractivity Profile for Cross River State},
  journal = {World Journal of Applied Physics},
  volume = {2},
  number = {1},
  pages = {19-26},
  doi = {10.11648/j.wjap.20170201.13},
  url = {https://doi.org/10.11648/j.wjap.20170201.13},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.wjap.20170201.13},
  abstract = {In this paper six months data on primary radioclimatic parameters obtained using Radiosunde lunched by Nigerian Meteorological Agency (NIMET) in Cross River state, Nigeria is used to model the vertical radio refractivity profile. Cross River state is located at 4°57’North in latitude and 8°19'East. For each of the six months, cubic trendline equation is developed to predict the refractivity in the lower atmosphere (where height < 150 m above sea level). The cubic trendline equation can enable the determination of refractivity at any height less than 150m and also point refractivity gradient which requires the refractivity at 0 m and at 65 m above sea level. Sample point refractivity gradient for the month of January was used to demonstrate the application of the vertical refractivity profile models. From the result, the point refractivity gradient of Cross River state is 124.278 N-units in January.},
 year = {2017}
}

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TY  - JOUR
T1  - Modelling and Application of Vertical Refractivity Profile for Cross River State
AU  - Egbe Jesam Nna
AU  - Ozuomba Simeon
AU  - Enyenihi Henry Johnson
Y1  - 2017/01/28
PY  - 2017
N1  - https://doi.org/10.11648/j.wjap.20170201.13
DO  - 10.11648/j.wjap.20170201.13
T2  - World Journal of Applied Physics
JF  - World Journal of Applied Physics
JO  - World Journal of Applied Physics
SP  - 19
EP  - 26
PB  - Science Publishing Group
SN  - 2637-6008
UR  - https://doi.org/10.11648/j.wjap.20170201.13
AB  - In this paper six months data on primary radioclimatic parameters obtained using Radiosunde lunched by Nigerian Meteorological Agency (NIMET) in Cross River state, Nigeria is used to model the vertical radio refractivity profile. Cross River state is located at 4°57’North in latitude and 8°19'East. For each of the six months, cubic trendline equation is developed to predict the refractivity in the lower atmosphere (where height < 150 m above sea level). The cubic trendline equation can enable the determination of refractivity at any height less than 150m and also point refractivity gradient which requires the refractivity at 0 m and at 65 m above sea level. Sample point refractivity gradient for the month of January was used to demonstrate the application of the vertical refractivity profile models. From the result, the point refractivity gradient of Cross River state is 124.278 N-units in January.
VL  - 2
IS  - 1
ER  -

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Author Information

Egbe Jesam Nna

Department of Electrical/Electronic and Computer Engineering, University of Uyo, Uyo, Nigeria
Ozuomba Simeon

Department of Electrical/Electronic and Computer Engineering, University of Uyo, Uyo, Nigeria
Enyenihi Henry Johnson

Department of Electrical/Electronic Engineering, Akwa Ibom State University, Mkpat Enin, Nigeria

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Plain Text BibTeX RIS

APA Style

Egbe Jesam Nna, Ozuomba Simeon, Enyenihi Henry Johnson. (2017). Modelling and Application of Vertical Refractivity Profile for Cross River State. World Journal of Applied Physics, 2(1), 19-26. https://doi.org/10.11648/j.wjap.20170201.13

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ACS Style

Egbe Jesam Nna; Ozuomba Simeon; Enyenihi Henry Johnson. Modelling and Application of Vertical Refractivity Profile for Cross River State. World J. Appl. Phys. 2017, 2(1), 19-26. doi: 10.11648/j.wjap.20170201.13

Copy | Download

AMA Style

Egbe Jesam Nna, Ozuomba Simeon, Enyenihi Henry Johnson. Modelling and Application of Vertical Refractivity Profile for Cross River State. World J Appl Phys. 2017;2(1):19-26. doi: 10.11648/j.wjap.20170201.13

Copy | Download

@article{10.11648/j.wjap.20170201.13,
  author = {Egbe Jesam Nna and Ozuomba Simeon and Enyenihi Henry Johnson},
  title = {Modelling and Application of Vertical Refractivity Profile for Cross River State},
  journal = {World Journal of Applied Physics},
  volume = {2},
  number = {1},
  pages = {19-26},
  doi = {10.11648/j.wjap.20170201.13},
  url = {https://doi.org/10.11648/j.wjap.20170201.13},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.wjap.20170201.13},
  abstract = {In this paper six months data on primary radioclimatic parameters obtained using Radiosunde lunched by Nigerian Meteorological Agency (NIMET) in Cross River state, Nigeria is used to model the vertical radio refractivity profile. Cross River state is located at 4°57’North in latitude and 8°19'East. For each of the six months, cubic trendline equation is developed to predict the refractivity in the lower atmosphere (where height < 150 m above sea level). The cubic trendline equation can enable the determination of refractivity at any height less than 150m and also point refractivity gradient which requires the refractivity at 0 m and at 65 m above sea level. Sample point refractivity gradient for the month of January was used to demonstrate the application of the vertical refractivity profile models. From the result, the point refractivity gradient of Cross River state is 124.278 N-units in January.},
 year = {2017}
}

Copy | Download

TY  - JOUR
T1  - Modelling and Application of Vertical Refractivity Profile for Cross River State
AU  - Egbe Jesam Nna
AU  - Ozuomba Simeon
AU  - Enyenihi Henry Johnson
Y1  - 2017/01/28
PY  - 2017
N1  - https://doi.org/10.11648/j.wjap.20170201.13
DO  - 10.11648/j.wjap.20170201.13
T2  - World Journal of Applied Physics
JF  - World Journal of Applied Physics
JO  - World Journal of Applied Physics
SP  - 19
EP  - 26
PB  - Science Publishing Group
SN  - 2637-6008
UR  - https://doi.org/10.11648/j.wjap.20170201.13
AB  - In this paper six months data on primary radioclimatic parameters obtained using Radiosunde lunched by Nigerian Meteorological Agency (NIMET) in Cross River state, Nigeria is used to model the vertical radio refractivity profile. Cross River state is located at 4°57’North in latitude and 8°19'East. For each of the six months, cubic trendline equation is developed to predict the refractivity in the lower atmosphere (where height < 150 m above sea level). The cubic trendline equation can enable the determination of refractivity at any height less than 150m and also point refractivity gradient which requires the refractivity at 0 m and at 65 m above sea level. Sample point refractivity gradient for the month of January was used to demonstrate the application of the vertical refractivity profile models. From the result, the point refractivity gradient of Cross River state is 124.278 N-units in January.
VL  - 2
IS  - 1
ER  -

Copy | Download