Second-Order Ionospheres' Effect in Precise Point Positioning During the Solar Minimum and the Solar Maximum Periods in Turkey
Küçük Resim Yok
Tarih
2015
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Science Bv
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
This paper investigates the second-order ionospheric effect on the estimated coordinates with using GIPSY 6.3 research software. Four IGS (International Global Service) stations were selected to perform precise point positioning (PPP) for the three different days. Three of these stations are in Turkey (ISTA, TUBI, ANKR) and the other one is in CYPRUS (NICO). The chosen days are within the solar maximum and the solar minimum periods which are the 294th day of year 2001 (DOY 294, 2001, solar maximum), 82th day of year 2014 (DOY 82, 2014, solar maximum) and the first day of year 2009 (DOY 1, 2009, solar minimum). Vertical Total Electron Content (TECV) was determined for the chosen IGS stations in these days. Approximately 5 TEC unit (TECU) changes for DOY 1, 2009 and 50-60 TECU changes for DOY 82, 2014 and DOY 294, 2001 were observed. 24 hours rinex observation files with 30 seconds sampling interval for each station and each day were processed with and without correcting the second-order ionosphere effect by GIPSY 6.3. The second-order effect is obtained from the difference between the two processes. The differences of XYZ Cartesian coordinates were transformed to topocentric coordinates (north, east, up) in order to analyze the second-order effect on the positioning more conveniently. The results show that the north component is affected significantly larger than the east and up components from the second-order ionospheric effect for each processed day. Maximum values of the north component between the two processes were observed in ANKR station (1.47mm) for DOY 294, 2001. East and up components are in the order of sub-millimeter level for each station and each day. The results of the difference between the two processes show that the impact of the second-order correction on positioning has a southward tendency for each station. This study, once again, clearly emphasized that the second-order ionospheric effect should be taken into account especially during the high solar activities period if high accuracy is needed. (C) 2015 The Authors. Published by Elsevier B.V.
Açıklama
1st World Multidisciplinary Earth Sciences Symposium (WMESS) -- SEP 07-11, 2015 -- Prague, CZECH REPUBLIC
Anahtar Kelimeler
Ionospheric, Solar Period, Ionosphere Effect, Ionospheric Correction
Kaynak
World Multidisciplinary Earth Sciences Symposium, Wmess 2015
WoS Q Değeri
Scopus Q Değeri
Cilt
15
