The ionospheric eclipse factor method (IEFM) and its application to determining the ionospheric delay for GPS |
| |
Authors: | Y Yuan C C Tscherning P Knudsen G Xu J Ou |
| |
Institution: | 1.Institute of Geodesy and Geophysics,Chinese Academy of Sciences,Wuhan,China;2.Department of Geophysics,University of Copenhagen,Copenhagen ?,Denmark;3.Department of geodesy,Danish National Space Center,Copenhagen ?,Denmark;4.GeoForschungsZentrum (GFZ) Potsdam,Potsdam,Germany |
| |
Abstract: | A new method for modeling the ionospheric delay using global positioning system (GPS) data is proposed, called the ionospheric
eclipse factor method (IEFM). It is based on establishing a concept referred to as the ionospheric eclipse factor (IEF) λ
of the ionospheric pierce point (IPP) and the IEF’s influence factor (IFF) . The IEF can be used to make a relatively precise distinction between ionospheric daytime and nighttime, whereas the IFF
is advantageous for describing the IEF’s variations with day, month, season and year, associated with seasonal variations
of total electron content (TEC) of the ionosphere. By combining λ and with the local time t of IPP, the IEFM has the ability to precisely distinguish between ionospheric daytime and nighttime, as well as efficiently
combine them during different seasons or months over a year at the IPP. The IEFM-based ionospheric delay estimates are validated
by combining an absolute positioning mode with several ionospheric delay correction models or algorithms, using GPS data at
an international Global Navigation Satellite System (GNSS) service (IGS) station (WTZR). Our results indicate that the IEFM
may further improve ionospheric delay modeling using GPS data. |
| |
Keywords: | GPS ionospheric delay correction algorithm Ionospheric eclipse factor (IEF) Ionospheric eclipse factor method (IEFM) Network real-time-kinematic (RTK) |
本文献已被 SpringerLink 等数据库收录! |
|