Low Latitude Ionosphere Error Correction Algorithms for Global Navigation Satellite System
B. Shivani1, Swapna Raghunath2

1B. Shivani*, Department of ECE, G. Narayanamma Institute of Technology and Sciences, India.
2Swapna Raghunath, Department of ECE, G. Narayanamma Institute of Technology and Sciences, India.
Manuscript received on December 17, 2019. | Revised Manuscript received on December 25, 2019. | Manuscript published on January 10, 2020. | PP: 3244-3248 | Volume-9 Issue-3, January 2020. | Retrieval Number: C8870019320/2020©BEIESP | DOI: 10.35940/ijitee.C8870.019320
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Abstract: The ionospheric errors occur due to loss of data in ionospheric region. Low latitudinal regions are the most affected regions due to ionospheric errors and also causes loss of signal or data for space based augmentation system(SBAS) such as aircraft. So to reduce these ionospheric errors in low latitude regions of Global Navigation Satellite System(GNSS) Klobuchar algorithm is used which mitigates the errors occurring in low latitude regions and is used as a standard algorithm in US Global Positioning System(GPS) till now; however, this model can reduce the ionospheric error by approximately 50-60% Root Mean Square(RMS) error in low-latitudes. So in order to increase the percentage deviation of errors in low-latitude regions, Enhanced Klobuchar algorithm is proposed which enhances the correction of low-latitude ionospheric errors approximately up to 80% RMS for a single frequency GPS user. In this paper error correction algorithms are performed over International GPS Service(IGS) data was collected using Hyderabad station receiver, Telangana (latitude- 17.41728°, longitude-78.55088°) in southern part of India during year 2016. 
Keywords: Ionospheric Errors, IGS, IRNSS, GAGAN, GPS, GNSS, SBAS, Low Latitude Ionospheric error Corrections.
Scope of the Article: Systems and Software Engineering