Precise Point Positioning

Dear Colleagues,

Precise point positioning (PPP) using global navigation satellite systems (GNSSs) has been demonstrated to be a powerful technique to provide high-precision positioning information worldwide. Over the past several decades, with the modernization of GPS and GLONASS as well as the continuous improvement of BDS, Galileo and QZSS, satellite navigation and positioning has entered an era of multi-system co-existence, and the new generation of space vehicles can all broadcast navigation signals in three or more frequencies. The abundant observations provide exciting opportunities for the improvement of positioning accuracy, reliability and other performance of PPP, and hence assured positioning, navigation, and timing (PNT) services. In addition to the modernization of GNSS, low Earth orbit (LEO) constellations, as important PNT systems, can greatly shorten the convergence and initialization time of GNSS-only PPP by virtue of its rapid geometry change, further making global instantaneous centimeter-level PPP possible.

This Special Issue of Electronics aims to provide a platform for researchers and practitioners to share their innovative algorithms and applications of PPP based on multi-frequency and multi-constellation GNSS. Potential topics include, but are not limited to, the following:

• Optimization and resilient adjustment of PPP observation and stochastic model.
• Multi-frequency PPP bias estimation, such as differential code bias (DCB), observation-specific bias (OSB), fractional cycle bias (FCB), etc.
• Innovative atmospheric modelling methods for PPP-RTK.
• LEO constellation enhanced GNSS PPP.
• Theory and modeling for PPP integrity monitoring.
• Recent achievements of PPP-themed international collaborations and campaigns.
• Research on applications of PPP in various fields, such as time and frequency transfer, satellite orbit determination, ionospheric modelling, monitoring of man-made and natural structures, etc.

Prof. Dr. Shuguo Pan
Prof. Dr. Xiaolin Meng 
Prof. Dr. Qiuzhao Zhang 
Dr. Wang Gao
Dr. Qing Zhao 
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Electronics is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

• PPP
• PPP-RTK
• multi-GNSS
• multi-frequency
• atmospheric modelling
• LEO
• integrity monitoring
• structural health monitoring