Algorithms and Application for Spatiotemporal Data Processing

A special issue of Algorithms (ISSN 1999-4893). This special issue belongs to the section "Algorithms for Multidisciplinary Applications".

Deadline for manuscript submissions: 1 December 2025 | Viewed by 456

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School of Geodesy and Geomatics, Wuhan University, Wuhan 430079,China
Interests: GNSS tropospheric delay; mapping function; atmospheric asymmetry; gradient
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Special Issue Information

Dear Colleagues,

With the continuous advancement of instrument science and sensor technology, spatiotemporal data are demonstrating more diverse types, more complex acquisition environments, and a dramatic increase in data volume. For the field of surveying and mapping, which emphasizes precision and reliability, the selection and improvement of algorithms have become particularly critical. The current challenges include, but are not limited to, the following: (1) data from different sources exhibit significant differences in format, accuracy, spatiotemporal resolution, physical meaning, and mathematical relationships, which poses the challenge of effectively fusing multi-source heterogeneous spatiotemporal data; (2) faced with massive data, traditional algorithms struggle to meet real-time demands, thereby highlighting the need for improvements in processing speed; (3) under extreme or harsh conditions, the data obtained is limited in quantity and uneven in quality, making the challenge of reliably extracting and interpreting necessary information particularly daunting; (4) traditional algorithms often require a significant manual intervention to process complex data, and how to enhance the intelligence level of data processing should be explored.

We invite high-quality, original research and review articles that delve into the latest advancements in spatiotemporal algorithms, their practical applications, and enhancements to current methodologies. We are particularly eager to receive contributions that showcase the implementation of these techniques in addressing complex systems across diverse fields.

Prof. Dr. Di Zhang
Guest Editor

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Keywords

  • geodesy and surveying engineering
  • industrial measurement and modeling
  • surveying adjustment and optimal estimation
  • multi-source fusion navigation and positioning
  • global navigation satellite systems (GNSSs)
  • remote sensing and photogrammetry
  • spatial data analysis
  • geospatial technologies
  • AI in surveying and mapping

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Published Papers (1 paper)

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Research

23 pages, 8304 KiB  
Article
Ultra-Low-Cost Real-Time Precise Point Positioning Using Different Streams for Precise Positioning and Precipitable Water Vapor Retrieval Estimates
by Mohamed Abdelazeem, Amgad Abazeed, Hussain A. Kamal and Mudathir O. A. Mohamed
Algorithms 2025, 18(4), 198; https://doi.org/10.3390/a18040198 - 1 Apr 2025
Viewed by 250
Abstract
This article aims to examine the real-time precise point positioning (PPP) solution’s accuracy utilizing the low-cost dual-frequency multi-constellation U-blox ZED-F9P module and real-time GNSS orbit and clock products from five analysis centers, including Bundesamt für Kartographie und Geodäsie (BKG), Centre National d’Etudes Spatiales [...] Read more.
This article aims to examine the real-time precise point positioning (PPP) solution’s accuracy utilizing the low-cost dual-frequency multi-constellation U-blox ZED-F9P module and real-time GNSS orbit and clock products from five analysis centers, including Bundesamt für Kartographie und Geodäsie (BKG), Centre National d’Etudes Spatiales (CNES), International GNSS Service (IGS), Geo Forschungs Zentrum (GFZ), and GNSS research center of Wuhan University (WHU). Three-hour static quad-constellation GNSS measurements are collected from ZED-F9P modules and geodetic grade Trimble R4s receivers over a reference station in Aswan City, Egypt, for a period of three consecutive days. Since a multi-GNSS PPP processing model is applied in the majority of the previous studies, this study employs the single-constellation GNSS PPP solution to process the acquired datasets. Different single-constellation GNSS PPP scenarios are adopted, namely, GPS PPP, GLONASS PPP, Galileo PPP, and BeiDou PPP models. The obtained PPP solutions from the low-cost module are validated for the positioning and precipitable water vapor (PWV) domains. To provide a reference positioning solution, the post-processed dual-frequency geodetic-grade GNSS PPP solution is applied; additionally, as the station under investigation is not a part of the IGS reference station network, a new technique is proposed to estimate reference PWV values. The findings reveal that the GPS and Galileo 3D position’s accuracy is within the decimeter level, while it is within the meter level for both the GLONASS and BeiDou models. Additionally, millimeter-level PWV precision is obtained from the four PPP models. Full article
(This article belongs to the Special Issue Algorithms and Application for Spatiotemporal Data Processing)
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