TY - GEN
T1 - Longitudinal Variability Study of Ionospheric Ranging Errors Around 20 N Geomagnetic Latitude
AU - Darya, Abdollah Masoud
AU - Shaikh, Muhammad Mubasshir
AU - Fernini, Ilias
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/7
Y1 - 2019/7
N2 - This study aims to highlight the effect of longitudinal variation on ionospheric ranging errors (IRE) for L1 frequency GPS users along the geomagnetic latitude of 20 degrees north. Observations from 9 GNSS stations - all within ±2 degrees of 200N - have been used, including the newly established GNSS station at Sharjah (SHJ1). The study period was chosen to be the winter solstice of 2018, a minimum solar period. Observation of derived IRE trends shows very small variations at early hours (0500 LT) of the morning. However, the error variation is quite significant at the peak hour (1400 LT) of the day. A comparison with the NeQuick 2 model shows that the model underestimates IRE calculation at 0500 LT and overestimates IRE values at 1400 LT, for most cases. It was also found that the ionosphere at the western hemisphere is generally more active than the eastern hemisphere for both periods. This study shows that the effect of longitudinal variation is significant along near equatorial latitudes and should be considered even at minimum solar periods.
AB - This study aims to highlight the effect of longitudinal variation on ionospheric ranging errors (IRE) for L1 frequency GPS users along the geomagnetic latitude of 20 degrees north. Observations from 9 GNSS stations - all within ±2 degrees of 200N - have been used, including the newly established GNSS station at Sharjah (SHJ1). The study period was chosen to be the winter solstice of 2018, a minimum solar period. Observation of derived IRE trends shows very small variations at early hours (0500 LT) of the morning. However, the error variation is quite significant at the peak hour (1400 LT) of the day. A comparison with the NeQuick 2 model shows that the model underestimates IRE calculation at 0500 LT and overestimates IRE values at 1400 LT, for most cases. It was also found that the ionosphere at the western hemisphere is generally more active than the eastern hemisphere for both periods. This study shows that the effect of longitudinal variation is significant along near equatorial latitudes and should be considered even at minimum solar periods.
KW - GNSS
KW - GPS
KW - Ionosphere
KW - NeQuick 2
KW - Total Electron Content
UR - http://www.scopus.com/inward/record.url?scp=85077997800&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85077997800&partnerID=8YFLogxK
U2 - 10.1109/IconSpace.2019.8905928
DO - 10.1109/IconSpace.2019.8905928
M3 - Conference contribution
AN - SCOPUS:85077997800
T3 - International Conference on Space Science and Communication, IconSpace
SP - 245
EP - 248
BT - 2019 6th International Conference on Space Science and Communication
A2 - Singh, Mandeep Singh Jit
A2 - Islam, Mohammad Tariqul
A2 - Mansor, Mohd Fais
A2 - Bahari, Siti Aminah
A2 - Daud, Noridawaty Mat
PB - IEEE Computer Society
T2 - 6th International Conference on Space Science and Communication, IconSpace 2019
Y2 - 28 July 2019 through 30 July 2019
ER -