Dr Tsegaye Kassa Gojie

http://www.bdu.edu.et/cos/content/dr-tsegaye-kassa-gogie

Education

  1. PhD in Physics (Space Physics/Ionospheric Physics), Bahir Dar University, Science College, Physics Department, Washera Geospace and Radar Science Laboratory, June 2015.
  2. M.Ed. in Physics (special focus to Computational Physics), Bahir Dar University, 2007.
  3. B.Sc. in Physics, Addis Ababa University, 2004.
  4. Diploma in Physics, Bahir Dar Teachers Training College, 1994.

 

Programing

  1. I have very good knowledge and skill in MatLab and Python programing.
  2. I also have working knowledge of R programing.
  3. I have developed regional ionospheric tomography software with the help of Bayesian inversion approach by using MatLab as a background.

 

Professional Contributions

  1. Associate professor in Space Physics, University of Bahir Dar, Ethiopia, April 11, 2016 to Present.
  2. Assistant professor in Physics, University of Bahir Dar, Ethiopia: January 2013-11 April 2016.
  3. Higher Diploma Program (HDP) tutor, September 2013 to June 2014.
  4. Lecturer, University of Bahir Dar, Ethiopia, July 2007-December 2012.
  5. HDP tutor, September 2008 to June 2009.
  6. Graduate assistant in Physics, University of Bahir Dar, Ethiopia, March 2005-July 2007.
  7. High School Physics Teacher, Ethiopia, July 1994 - February 2004.

 

Leadership and Managerial Experiences

  1. Postgraduate, Research and Community Service Vice Dean, College of Science, Bahir Dar University, 12 October 2019 to present
  2. Graduate Program Coordinator, Department of Physics, College of Science, Bahir Dar University, May 2019 to 11 October 2019
  3. Chairman Department of Physics, College of Science, Bahir Dar University, April 2017 to April 2019
  4. Chairman, Ethiopian Space Science Society, Bahir Dar, Branch, March 2017 to present
  5. Atmospheric and Space Physics course chair, Department of Physics, March 2017 to May 2019
  6. Member of Physics Department Council, Bahir Dar University, June 2008-2009
  7. Computer Administrator of Physics Virtual Laboratory under DIF Project, Bahir Dar Univer- sity, September 2007-February 2007.

 

Publications

Journal Articles

  1. Mulugeta S. , Kassa T.. Comparison of GPS Loss of Lock with S4-proxy from IGS network data and S4 from SCINDA network data over Bahir Dar . In: Adv. Space Res. (2022).
  2. Mulugeta S. , Kassa T.. Investigation of Nighttime Loss lock occurrence and its characteristics over Ethiopia using Geodetic GPS receivers of the GIS network. In: Adv. Space Res. (2021), doi:10.1016/j.asr.2021.10.035.
  3. Yihun  A.  ,  Kassa  T.,  Martin  V.  &  Addisu  H.  Estimating  precipitable  water  vapour   using the Global Positioning System and Radio Occulation over Ethiopian Regions. In: The International Journal Of Remote Sensing (2021), 42:17, 6581-6606, doi: 10.1080/01431161.2021.1939914.
  4. Mulugeta S. , Kassa T.. Nighttime Ionospheric Scintillation inferred  from  Rate  of  Total Electron Content Index (ROTI) Values over Bahir Dar, Ethiopia. In: Adv. Space Res.  (2021), 67(4), doi: 10.1016/j.asr.2020.11.030.
  5. Kassa T. The Rate of Ionospheric Total Electron Content Index (ROTI)  as  a  proxy  for nighttime Ionospheric Scintillation using Ethiopian low-latitude GPS data. In: Journal of Geomagnetism and Aeronomy (2021), Springer, New York, USA, 61(3), doi:10.1134/S0016793221030051.
  6. Gebregiorgis A., Tesfay Y. & Kassa T. Geomagnetic storms and their impacts on the Ethiopian’s power grid. In: Advances in Astronomy and Space Physics (2020), Taras Shevchenko National Univer- sity of Kyiv, Ukraine.10,doi:10.17721/2227-1481.10.55-64.
  7. Yihun A. , Kassa T., Martin V. & Addisu H. Higher Order Ionospheric Delay and Derivation of Regional Total Electron Content over Ethiopian GPS Stations. In: Adv. Space Res. (2020), https://doi.org/10.1016/j.asr.2020.04.035.
  8. Kassa T. Modeling the solar, geomagnetic and periodic variations of the ionosphere over Ethiopia. In: Advances in Astronomy and Space Physics (2020), 10(1), Taras Shevchenko National University of Kyiv, Ukraine.
  9. Aragaw M. , Gebiregiorgis A.. & Kassa T. Solar activity and geomagnetic storm effects on GPS ionospheric TEC over Ethiopia. In: Momona Ethiopian Journal of Science (2019), 11(2), 276-300, Mekelle University, Ethiopia, http: // dx. doi. org/ 10. 4314/ mejs. v11i2. 7 .
  10. Kassa, T., Tilahun S. & Damtie B. Solar Activity Indices as a Proxy for the Variation of Ionospheric Total Electron Content (TEC) over Bahir Dar during the year 2013. In: Adv. Space Res. (2017), http: // dx. doi. org/ 10. 1016/ j. asr. 2017. 06. 024 .
  11. Kassa, T. & Damtie B. Ionospheric irregularities over Bahir Dar, Ethiopia during selected geomagnetic storms. In: Adv. Space Res. (2017), http: // dx. doi. org/ 10. 1016/ j. asr. 2017. 03. 036 .

 

  1. Beshir E. & Kassa T. Characterization of Ionospheric Scintillation in a Geomagnetic Equa- torial Region  Station.  Adv.  Space Res., July 2015, Article inpress, http: // dx. doi: 10. 1016/ j. asr. 2015. 07. 035 .
  2. Kassa T., Damtie B., Bires A., Yizengaw E. & Cilliers P. Storm-time characteristics of the equatorial ionization anomaly in the East African sector. Adv. Space Res., April 2015, http:

// dx. doi: 10. 1016/ j. asr. 2015. 04. 002 .

  1. Kassa T., Damtie B., Bires A., Yizengaw E. & Cilliers P. Spatio-temporal characteristics of the Equatorial Ionization Anomaly (EIA) in the East African region via ionospheric tomogra- phy during the year 2012. Adv. Space Res., 55, 184-198, 16- Sep-2014, http: // dx. doi. org/ 10. 1016/ j. asr. 2014. 09. 001 .
  2. Mengistu E. & Kassa T. Temporal characteristics of Equatorial Electrojet and Counter Elec- trojet over Ethiopian sector. Adv.  Space Res., October 2014, http: // dx. doi. org/ 10. 1016/ j. asr. 2014. 10. 031 .
  3. Asmare Y., Kassa T. & Nigussie M. Validation of IRI-2012 TEC model over Ethiopia during solar minimum (2009) and solar maximum (2013) phases. Adv. Space Res., 53 (1), 1582-1594, February 2014, http: // dx. doi. org/ 10. 1016/ j. asr. 2014. 02. 017 .
  4. Chartier A., Kinrade J., Mitchell C., Rose J., Jackson D., Cilliers P., Habarulema J., Katamzi Z., Mckinnell L., Matamba T., Opperman B., Ssessanga N., Mezgebe N., Tyalimpi V., Franceschi G., No- tarpietro R., Romano V., Scotto C., Dovis F., Avenant E., Wonnacott R., Oyeyemi E., Mahrous A., Mengistu G., Lekamisy H. , Olwendo J., Sibanda P., Kassa T. & Rabiu B. Ionospheric Imaging in Africa. Radio Sci., 49, doi: 10.1002/2013 RS005238, USA, January 2014.
  5. Kassa T., Damtie B. & Yizengaw E. The Response of Ethiopian Ionosphere to the Magnetic Storm of 11 October 2008. LAJPE, 6, Mexico, June 2012.
  6. Kassa T. & Damtie B., Hydrostatic Equilibrium in modeling the neutral atmosphere. LAJPE, 4 (2), Mexico, May 2010.
  7. Kassa T., Damtie B. & Sahlu D., Computer based teaching aid for basic vector operations in higher institution Physics. Latin American Journal of Physics Education. 4 (1), Mexico, January 2010.
  8. Kassa T. & Damtie B., Impacts of computer Simulation on Students’ Achievement, Group interaction and Attitude in Direct Current Circuits, The Ethiopian Journal of Higher Education (EJHE), 4 (1), Addis Ababa, Ethiopia, June 2007.
  9. Kassa T., Demonstrating the Physics of Simple Pendulum Via Computer Simulation. The Ethiopian Journal of Science and Technology. 44 (1), 57-58, Bahir Dar University, Bahir Dar, Ethiopia, October 2006.

 

Book

  1. Kassa T., PhD  Dissertation,  Spatiotemporal characteristics of the Equatorial ionization anomaly in the East African sector via ionospheric tomography, LAP LAMBERT Publishing GmbH and Co. KG, Heinrich-Bocking-Str., Saarbrucken Germany, 2015.
  2. Kassa T., Master thesis, Impacts of Computer Simulations, LAP LAMBERT Publishing GmbH and Co. KG, Heinrich-Bocking-Str. 6-8, 66121 Saarbrucken Germany, 2011.

 

Proceedings

  1. Kassa T., Modeling the solar, geomagnetic and periodic variations of the ionosphere over Ethiopia, International Workshop on Lean Satellite, 22-24 January 2018.
  2. Kassa T., Space Research Facilities and Activities at Washera Geospace and Radar Science Laboratory (WaGRL), the 4th Gondar School of Science and Technology, Gondar University, Ethiopia, 03- 05 January 2014.
  3. Kassa T., Ionospheric Response to Solar Eclipse of Selected Events during the Period of 2009 - 2013 in Different Ethiopian Regions, the 4th Gondar School of Science and Technology, Gondar University, Ethiopia, 03-05 January 2014.

 

  1. Kassa T., Effects of Geomagnetic Storms on GPS Ionospheric Observables (VTEC (ROTI) and S4 index), the 3rd Gondar School of Science and Technology, Gondar University, Ethiopia, 13-16 December 2012.
  2. Kassa T., Seasonal Variations of the Equatorial Anomaly Inferred from ground-based GPS Receivers in the Ethiopian Sector via Tomographic Study, the 2nd Gondar School of Science and Technology, Gondar University, Ethiopia, 22-25 December 2011.

 

Conference Papers

  1. Kassa T., Damtie B., Bires A., Yizengaw E. & Cilliers P. Spatio-temporal characteristics of the Equatorial Ionization Anomaly (EIA) in the East African region via ionospheric tomography during the year 2012. United Nations/Japan Workshop on Space Weather ”Science and Data Products from ISWI Instruments”, Fukuoka, Japan, 2-6 March 2015.
  2. Aara’L  Y.  and  Kassa  T.  Statistics  of  ionospheric  amplitude  scintillation  and  its  correla- tion with phase scintillation over Bahir Dar  using  GPS  SCINDA  during  solar  maximum phase. Emerging Researchers National Conference in Science, Technology, Engineering and Mathematics (STEM), February 19-21 2015, Washington DC, USA.
  3. Kassa T., Tessema F., Bires A. and Nigussie M. Ionospheric response to Annular solar eclipse of 15 January 2010 and 03 November 2013 in the Ethiopian zone, the 4th Gondar School of Science and Technology, January 2014, Gondar University, Ethiopia.
  4. Kassa T. Space Science activities and facilities at Washera Geospace and Radar Science Laboratory, Bahir Dar, Ethiopia, the 4th Gondar School of Science and Technology, January 2014, Gondar University, Ethiopia.
  5. Kassa T. Characterizing the Ethiopian Ionosphere via GPS Observables and 2D electron density profile, ISWI/SCOSTEP, 21 October to 01 November 2013, Nairobi, Kenya.
  6. Kassa T. Space Science activities at Washera Geospace and Radar Science Laboratory, ISWI/SCOSTEP, 21 October to 01 November 2013, Nairobi, Kenya.
  7. Kassa T. Characterizing Equatorial Ionization Anomaly in Ethiopian sector, Beacon Satellite sympo- sium, Bath University, 08-12 July 2013, UK.
  8. Kassa T. Effects of 07 April 2011 and 22 January 2012 geomagnetic storms on GPS ionospheric observ- ables at Bahir Dar , the 1st Annual Science Conference (ASC) organized by Science College, BDU, 31 May-01 June 2013, Gondar University, Ethiopia.
  9. Kassa T. Characterizing Equatorial Ionization Anomaly in Ethiopian sector, Ionospheric monitoring workshop, Hermanus, 24-25 January 2013, South Africa.
  10. Kassa T. Seasonal Variations of the Equatorial Anomaly Inferred from ground-based GPS Receivers in the Ethiopian Sector via Tomographic Study, the 2nd Gondar School of Science and Technology, December 2012, Gondar University, Ethiopia.

 

Postgraduate thesis Advising

        Sample Ph.D. theses that I am supervising

  1. AsmamawY.,HigherOrderIonosphericDelayandDerivationofRegionalTotalElectronContent over Ethiopian GPS Stations, Bahir Dar University, Science College, Physics Department, Bahir Dar, Ethiopia, (Graduated on September 2021).
  2. Samuel M., Nighttime Loss of Lock and ionospheric Scintillation Occurrence over Ethiopia, Bahir Dar University, Science College, Physics Department, Bahir Dar, Ethiopia, (He published two articles and the third is under minor review. Besides, he is writing his thesis).
  3. Asmelash G., Imaging Ionosphere using 3D and 4D tomography over East Africa Region/ sector, Bahir Dar University, Science College, Physics Department, Bahir Dar, Ethiopia, (On progress).
  4. Seydie M., Space weather forecasting and its effect on Ionospheric Observables, Bahir Dar Uni- versity, Science College, Physics Department, Bahir Dar, Ethiopia, (On progress).

 

        Sample M.Sc. theses that I have supervised

  1. Kasech Gezahegne, Estimation of Ionosphere vTEC using Multivariate Quadratic modeling over Bahir Dar, Ethiopia, (September 2021).
  2. Nigistie Menkir, Performance of ionospheric models over Bahir Dar, Ethiopia,during the period of 2010-2014 (August 2020).
  3. Rabiatalhabesha Bilal, The response of ionospheric vTEC to solar EUV and F10.7 variations in the year 2012-2015 over Ethiopia, (September 2019).
  4. Getawa Fisie, Temporal and Spatial variations of TEC using simultaneous measurement, Bahir Dar University, Science College, Physics Department, Bahir Dar, Ethiopia, (September 2018).
  5. Getaye Abebaw, TEC variations during solar maximum near the equatorial ionization anomaly, Bahir Dar University, Science College, Physics Department, Bahir Dar, Ethiopia, (September 2018).
  6. H/Gebrel Kahsay, Tracking the ionosphere response to the solar Eclipse of November 03, 2003 over East Africa, Bahir Dar University, Science College, Physics Department, Bahir Dar, Ethiopia, (September 2018).
  7. Yamrot Biniam, Solar wind high speed stream as a proxy for the variation of TEC, Bahir Dar University, Science College, Physics Department, Bahir Dar, Ethiopia, (June 2018).
  8. Tsedal Mersha, Temporal and spatial variations of TEC using simultaneous measurement from the Ethiopian GPS network, Bahir Dar University, Science College, Physics Department, Bahir Dar, Ethiopia, (June 2018).
  9. Rabiatalhabesha  Bilal, The response of ionospheric TEC to solar EUV and F10.7 variations in the year 2012-2015 over Ethiopia, Bahir Dar University, Science College, Physics Department, Bahir Dar, Ethiopia, (June 2018).
  10. Dasash Maregu, Characterizing ionospheric phase scintillation over Ethiopia from GNNS data observations, Bahir Dar University, Science College, Physics Department, Bahir Dar, Ethiopia, (June 2018).
  11. Antneh Gashaye, Correlation between Ionospheric scintillation, total electron content enhance- ment and depletions over the Ethiopian region, Bahir Dar University, Science College, Physics Department, Bahir Dar, Ethiopia, (June 2014).
  12. Fantahun Alematnaf, Ionospheric response to total solar eclipse of the year 2009-2012 in different Ethiopian regions, Bahir Dar University, Science College, Physics Department, Bahir Dar, Ethiopia, (June 2014).
  13. Zerihun Alemu, Electrojet control of ambient ionization near the crest of the equatorial anomaly in the Ethiopian zone, Bahir Dar University, Science College, Physics Department, Bahir Dar, Ethiopia, (June 2014).
  14. Alimaw Keru, Time delay and duration of ionospheric total electron content responses to ge- omagnetic disturbances, Bahir Dar University, Science College, Physics Department, Bahir Dar, Ethiopia, (June 2014).
  15. Habtamu Tekle, Interplanetary electric fields and their relationship to low-latitude electric fields under disturbed conditions, Bahir Dar University, Science College, Physics Department, Bahir Dar, Ethiopia, (June 2014).
  16. Ephrem Beshir, Characterization of ionospheric scintillation in Bahir Dar station, Bahir Dar University, Physics Program, Bahir Dar, Ethiopia, (June 2012).
  17. Dereje Getachew, The response of Ethiopian ionosphere to the magnetic storm of 9 March 2008 and 22 July 2009, Bahir Dar University, Science College, Physics Department, Bahir Dar, Ethiopia, (June 2012).
  18. Malefia Sinor, Characterization of ionospheric time delay over Ethiopian sector, Bahir Dar Uni- versity, Science College, Physics Department, Bahir Dar, Ethiopia, (June 2012).
  19. Wasihun Ayenew, Ionospheric Map inferred from ground-based GPS receivers over Ethiopian sector, Bahir Dar University, Science College, Physics Department, Bahir Dar, Ethiopia, (June 2012).

 

  1. Teshome Dugassa, Equatorial Electrojet inferred from ground-based magnetometer data over Ethiopian sector, Bahir Dar University, Science College, Physics Department, Bahir Dar, Ethiopia, (August 2011).
  2. Gebrehiwot Halefom, The relationship between Equatorial Electrojet and Ionospheric vTEC in the Ethiopian sector, Bahir Dar University, Science College, Physics Department, Bahir Dar, Ethiopia, (October 2012)
  3. Kifle Gebrekidan, Characterizing Ionospheric Total Electron Content over Ethiopan  region, Bahir Dar University, Science College, Physics Department, Bahir Dar, Ethiopia, (October 2012).
  4. Mohammod Ayalew, Statistical study of nighttime scintillation in the Ethiopian longitude, Bahir Dar University, Science College, Physics Department, Bahir Dar, Ethiopia, (June 2013).
  5. Tibebu Getachew, Equatorial anomaly inferred from ionospheric mapping, Bahir Dar University, Science College, Physics Department, Bahir Dar, Ethiopia, (June 2013).
  6. Yekoye Asmare, IRI model validation for the Ethiopian ionosphere, Bahir Dar University, Science College, Physics Department, Bahir Dar, Ethiopia, (June 2013).
  7. Debrie Ayalew, Ionospheric TEC fluctuation in the Ethiopian sector, Bahir Dar University, Science College, Physics Department, Bahir Dar, Ethiopia, (June 2013).
  8. Habtamu Aboretugn, Analysis and validation of different global ionospheric maps (GIMs) over Ethiopia, Bahir Dar University, Science College, Physics Department, Bahir Dar, Ethiopia, Septem- ber 2015.
  9. Tegene Ali, Effects of geomagnetic storms on GPS ionospheric scintillations at Bahir Dar, Bahir Dar University, Science College, Physics Department, Bahir Dar, Ethiopia, September 2015.
  10. Berhe Assefa, Statistical analysis of solar activity variations of total electron content derived from GPS observations in Ethiopian region, Bahir Dar University, Science College, Physics Department, Bahir Dar, Ethiopia, September 2015.
  11. Yirga Sisay, Equatorial scintillations in relation to the development of ionization anomaly, Bahir Dar University, Science College, Physics Department, Bahir Dar, Ethiopia, September 2015.
  12. Merga Gadissa, Students difficulties in connecting graphs and physics in kinematics: The case of

 

· · ·

, Bahir Dar University, Science College, Physics Department, Bahir Dar, Ethiopia, September 2015.

  1.  

· · ·

Hyeleyesus Alemayehu, Students concepts of gravity: The case of , Bahir Dar University, Science College, Physics Department, Bahir Dar, Ethiopia, September 2015.

 

Awards and funded projects

  1. SCOSTEP visiting scholar at South African National Space Agency for the year 2017.
  2. SCOSTEP visiting scholar at South African National Space Agency for the year 2016.
  3. The effects of an interactive computer-assisted instruction on the achievement and attitudes of students to learn the concept of fractions. A project funded by Institute for the pedagogical and Educational Research-IPER at Bahir Dar University for the year 2009/10 E.C.
  4. First ranked at the 2016 Amhara Region Universities forum Space Science Contest under Research in Space Science, Gondar University, 30 March 2016 (budget awarded: 15000 ETB) .
  5. Visiting scholar at Oulu University under CIMO exchange scholarship program, Oulu, Finland, 2010.
  6. Satellite based investigation of precipitation measurement: feasibility study of Bahir Dar City and premises to Ethiopia, BNWI, 2015.
  7. The 2014 Ethiopian Physical Society-North America (EPS-NA) Scholarship for a PhD Student Category in recognition of highest scholastic accomplishment, his high quality research in the field of physics and his contribution to the community, On the First Day of February 2014 (budget awarded: 180 USD) .

 

  1. A statistical study of low latitude ionospheric F-region irregularities in the Ethiopian longitudinal sector: Response to geomagnetic storms during post-sunset hours in the year 2012-2013. Funded by Gradu- ate, Research and community Service of Science College (Project period: 2014/15 and budget awarded: 21, 000 ETB )
  2. Investigating the Response of Ethiopian Ionosphere to the Minor  Magnetic  Storm  of 06 April 2011 and 22 January 2012. Funded by Graduate, Research and community Service  of  Science  College (Project period: 2012/13 and budget awarded: 16, 000 ETB).

 

References

  1. Baylie Damtie, PhD, Associate professor, Former President of Bahir Dar University & head Washera Geospace and radar science Laboratory, Physics Department, Science College, Bahir Dar university, Bahir Dar, Ethiopia and Currently Vice Chancellor at Kepler International University, Kigali, Rwanda Email: bayliedamtie@yahoo.com.
  2. Pierre Cilliers,  PhD, Associate Professor,  South African Space Agency,  Cape town South Africa,

Email:  pjcilliers@sansa.org.za.

  1. Gebregziabher Kahsay, PhD, Associate Professor, Physics Department, Science College, Bahir Dar university, Bahir Dar, Ethiopia, Email: michige_90@yahoo.com.