Vertical Radio Refractivity Profile for Calabar in the Southern Region of Nigeria

Ngwu Chinyere Rosemary; Ozuomba Simeon; Okon Abasiama Colman

doi:doi:10.11648/j.ep.20170101.14

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Vertical Radio Refractivity Profile for Calabar in the Southern Region of Nigeria

Ngwu Chinyere Rosemary, Ozuomba Simeon, Okon Abasiama Colman

Published in Engineering Physics (Volume 1, Issue 1)

Received: 25 October 2016 Accepted: 3 January 2017 Published: 30 January 2017

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Abstract

In this paper, six months Radiosunde data for Calabar in the Southern region of Nigeria is used to model vertical refractivity profile. Calabar is located in Cross River State 4°57’North in latitude and 8°19'East in longitude which is in the South South region of the country. The Radiosunde data is obtained from Nigerian Meteorological Agency (NIMET). Particularly, cubic trendline model is developed for each of the six months to predict the vertical profile of refractivity in the lower atmosphere (< 150 m) above sea level). The model can be used to predict the refractivity at any height between 0 m and 150 m. Also, the model can enable the determination of 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. In the month of January, it was found that the point refractivity gradient is 124.278 N-units.

Published in	Engineering Physics (Volume 1, Issue 1)
DOI	10.11648/j.ep.20170101.14
Page(s)	21-26
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), 2017. Published by Science Publishing Group

Keywords

Refractivity, Refractivity Gradient, Vertical Profile, Point Refractivity, Refractive Index

References

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Ngwu Chinyere Rosemary, Ozuomba Simeon, Okon Abasiama Colman. (2017). Vertical Radio Refractivity Profile for Calabar in the Southern Region of Nigeria. Engineering Physics, 1(1), 21-26. https://doi.org/10.11648/j.ep.20170101.14

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ACS Style

Ngwu Chinyere Rosemary; Ozuomba Simeon; Okon Abasiama Colman. Vertical Radio Refractivity Profile for Calabar in the Southern Region of Nigeria. Eng. Phys. 2017, 1(1), 21-26. doi: 10.11648/j.ep.20170101.14

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AMA Style

Ngwu Chinyere Rosemary, Ozuomba Simeon, Okon Abasiama Colman. Vertical Radio Refractivity Profile for Calabar in the Southern Region of Nigeria. Eng Phys. 2017;1(1):21-26. doi: 10.11648/j.ep.20170101.14

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@article{10.11648/j.ep.20170101.14,
  author = {Ngwu Chinyere Rosemary and Ozuomba Simeon and Okon Abasiama Colman},
  title = {Vertical Radio Refractivity Profile for Calabar in the Southern Region of Nigeria},
  journal = {Engineering Physics},
  volume = {1},
  number = {1},
  pages = {21-26},
  doi = {10.11648/j.ep.20170101.14},
  url = {https://doi.org/10.11648/j.ep.20170101.14},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ep.20170101.14},
  abstract = {In this paper, six months Radiosunde data for Calabar in the Southern region of Nigeria is used to model vertical refractivity profile. Calabar is located in Cross River State 4°57’North in latitude and 8°19'East in longitude which is in the South South region of the country. The Radiosunde data is obtained from Nigerian Meteorological Agency (NIMET). Particularly, cubic trendline model is developed for each of the six months to predict the vertical profile of refractivity in the lower atmosphere (< 150 m) above sea level). The model can be used to predict the refractivity at any height between 0 m and 150 m. Also, the model can enable the determination of 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. In the month of January, it was found that the point refractivity gradient is 124.278 N-units.},
 year = {2017}
}

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TY  - JOUR
T1  - Vertical Radio Refractivity Profile for Calabar in the Southern Region of Nigeria
AU  - Ngwu Chinyere Rosemary
AU  - Ozuomba Simeon
AU  - Okon Abasiama Colman
Y1  - 2017/01/30
PY  - 2017
N1  - https://doi.org/10.11648/j.ep.20170101.14
DO  - 10.11648/j.ep.20170101.14
T2  - Engineering Physics
JF  - Engineering Physics
JO  - Engineering Physics
SP  - 21
EP  - 26
PB  - Science Publishing Group
SN  - 2640-1029
UR  - https://doi.org/10.11648/j.ep.20170101.14
AB  - In this paper, six months Radiosunde data for Calabar in the Southern region of Nigeria is used to model vertical refractivity profile. Calabar is located in Cross River State 4°57’North in latitude and 8°19'East in longitude which is in the South South region of the country. The Radiosunde data is obtained from Nigerian Meteorological Agency (NIMET). Particularly, cubic trendline model is developed for each of the six months to predict the vertical profile of refractivity in the lower atmosphere (< 150 m) above sea level). The model can be used to predict the refractivity at any height between 0 m and 150 m. Also, the model can enable the determination of 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. In the month of January, it was found that the point refractivity gradient is 124.278 N-units.
VL  - 1
IS  - 1
ER  -

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Author Information

Ngwu Chinyere Rosemary

Department of Computer Engineering, Michael Okpara University of Agriculture, Umudike, Nigeria
Ozuomba Simeon

Department of Electrical, Electronic and Computer Engineering, University of Uyo, Uyo, Nigeria
Okon Abasiama Colman

Department of Electrical, Electronic and Computer Engineering, University of Uyo, Uyo, Nigeria

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APA Style

Ngwu Chinyere Rosemary, Ozuomba Simeon, Okon Abasiama Colman. (2017). Vertical Radio Refractivity Profile for Calabar in the Southern Region of Nigeria. Engineering Physics, 1(1), 21-26. https://doi.org/10.11648/j.ep.20170101.14

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ACS Style

Ngwu Chinyere Rosemary; Ozuomba Simeon; Okon Abasiama Colman. Vertical Radio Refractivity Profile for Calabar in the Southern Region of Nigeria. Eng. Phys. 2017, 1(1), 21-26. doi: 10.11648/j.ep.20170101.14

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AMA Style

Ngwu Chinyere Rosemary, Ozuomba Simeon, Okon Abasiama Colman. Vertical Radio Refractivity Profile for Calabar in the Southern Region of Nigeria. Eng Phys. 2017;1(1):21-26. doi: 10.11648/j.ep.20170101.14

Copy | Download

@article{10.11648/j.ep.20170101.14,
  author = {Ngwu Chinyere Rosemary and Ozuomba Simeon and Okon Abasiama Colman},
  title = {Vertical Radio Refractivity Profile for Calabar in the Southern Region of Nigeria},
  journal = {Engineering Physics},
  volume = {1},
  number = {1},
  pages = {21-26},
  doi = {10.11648/j.ep.20170101.14},
  url = {https://doi.org/10.11648/j.ep.20170101.14},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ep.20170101.14},
  abstract = {In this paper, six months Radiosunde data for Calabar in the Southern region of Nigeria is used to model vertical refractivity profile. Calabar is located in Cross River State 4°57’North in latitude and 8°19'East in longitude which is in the South South region of the country. The Radiosunde data is obtained from Nigerian Meteorological Agency (NIMET). Particularly, cubic trendline model is developed for each of the six months to predict the vertical profile of refractivity in the lower atmosphere (< 150 m) above sea level). The model can be used to predict the refractivity at any height between 0 m and 150 m. Also, the model can enable the determination of 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. In the month of January, it was found that the point refractivity gradient is 124.278 N-units.},
 year = {2017}
}

Copy | Download

TY  - JOUR
T1  - Vertical Radio Refractivity Profile for Calabar in the Southern Region of Nigeria
AU  - Ngwu Chinyere Rosemary
AU  - Ozuomba Simeon
AU  - Okon Abasiama Colman
Y1  - 2017/01/30
PY  - 2017
N1  - https://doi.org/10.11648/j.ep.20170101.14
DO  - 10.11648/j.ep.20170101.14
T2  - Engineering Physics
JF  - Engineering Physics
JO  - Engineering Physics
SP  - 21
EP  - 26
PB  - Science Publishing Group
SN  - 2640-1029
UR  - https://doi.org/10.11648/j.ep.20170101.14
AB  - In this paper, six months Radiosunde data for Calabar in the Southern region of Nigeria is used to model vertical refractivity profile. Calabar is located in Cross River State 4°57’North in latitude and 8°19'East in longitude which is in the South South region of the country. The Radiosunde data is obtained from Nigerian Meteorological Agency (NIMET). Particularly, cubic trendline model is developed for each of the six months to predict the vertical profile of refractivity in the lower atmosphere (< 150 m) above sea level). The model can be used to predict the refractivity at any height between 0 m and 150 m. Also, the model can enable the determination of 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. In the month of January, it was found that the point refractivity gradient is 124.278 N-units.
VL  - 1
IS  - 1
ER  -

Copy | Download