NATIONAL TECHNICAL UNIVERSITY OF ATHENS
SCHOOL OF RURAL, SURVEYING
AND GEOINFORMATICS ENGINEERING
@CNES image from ids (https://ids-doris.org/)
A small abstract about the project.
Geodesy has greatly advanced since the introduction of artificial, Earth orbiting satellites. A new era has emerged, where satellite-based data dominate the field, providing results for a wide range of geodesy-related fields, including but not limited to positioning, reference frames, altimetry and gravity field determination. Exploitation of satellite-based observations though, is inherently coupled with the complex problem of orbit determination. The current proposal's objective is the design and implementation of a state-of-the-art, open-source and free software to perform precise orbit determination and positioning using the Doppler Orbitography and Radiopositioning Integrated by Satellite (DORIS) satellite system. DORIS is one of the three fundamental systems for precise orbit determination in satellite geodesy, the one though with the biggest lack in dedicated scientific software for data analysis. Within the framework of the project, three satellite missions will be targeted, namely Jason-3, Sentinel-3A and HY-2C. Via the software, users will be able to estimate precise orbit state, DORIS beacon positions and a series of parameters of atmospheric and geodetic interest. Data analysis and source code validation will take place to validate the accuracy achieved. The research team will present relevant work in two international conferences and puiblish a scientific paper in an international journal. Additionaly a workshop will be organised in the host institution to present the software and its usage and disseminate expertise and conclusions.
| Proposal Number | 15562 |
| Title | Precise oRbit dEtermination and Positioning using sAtellite doppleR obsErvations [PREPARE] |
| Principal Investigator | Dimitrios Anastasiou |
| Action | Basic Research Financing (Horizontal support for all Sciences), National Recovery and Resilience Plan (Greece 2.0) |
| Sub-action | Sub-action 1. Funding New Researchers – RRF: Basic Research Financing (Horizontal support for all Sciences) |
| Scientific Area | SA2. Engineering Sciences & Technology |
| Host Institution | NATIONAL TECHNICAL UNIVERSITY OF ATHENS |
| Department | SCHOOL OF RURAL AND SURVEYING ENGINEERING |
| Approved budget | 190,000.00 € |
| Starting Date | 16/11/2023 |
| Duration (in months) | 24 |
WP1
Refactoring
The team will investigate the algorithms and technological development so far, with regard to doppler data analysis. It will explore and study related software and tools. At the end of this working package the standards and specifications for the development software will be decided.
WP2
Core software development
Design and development of the core part of the new software for doppler observationis analysis. In this working package all the necessary algorithms and routines for the processing will be developed and they are independent of the specific satellites.
WP3
Attitude and phase low implementation
Implement space-vehicle attitude determination (either quaternion based if possible or using phase law). Implement satellite-specific geometrical design (e.g. vehicle-fixed reference frame), on-board phase center offset and macromodels.
WP4
Validation of geodetic parameters and time series analysis
Stack position estimates derived from the processing of data performed in WP4, to get time-series for DORIS network beacons, in and/or around Greece. Analyze the time-series to derive crustal dynamics (tectonic velocity and harmonics signals if any) on each point and compare with results for GPS/GNSS collocated sites. Retrieve IDS published orbits (in Sp3c format) and compare with the estimates obtained by the processing in WP4. Compare estimated Earth Orientation parameters to the ones published by the IERS.
WP6
Dissemination and communication management
Part of the project will be the dissemination of research results and discussion with the scientific community on new solutions and approaches introduced. A website will be developed to promote the project and disseminate the new software. A school/workshop will be organized especially for young researchers in order to learn about the new software and the possibilities that it will provide. Overall, the projects aim to contribute to the development of a research network in Greece and in collaboration with the international scientific community regarding the utilization of the DORIS system. Finally, the results will be presented to the students of the Host Institute (NTUA) or other technical universities.
WP7
Project management
Principal investigator supervises the work flow and financial management of the project. He is in direct contact with the managing authority and the Host Institute responsible for the progress of the project.
| D. Number | Deliverrable Name | WP | Type | Link |
|---|---|---|---|---|
| D.1 | Software Specifications | 1 | R | |
| D.2 | Software Release v1.0b1 | 2 | DEM | |
| D.3 | Software Release v1.0b4 | 3 | DEM | |
| D.4 | Software Release v1.0 | 4 | DEM | |
| D.5 | Results of Data Processing | 4 | R | |
| D.6 | Technical Report WP5 | 5 | R | |
| D.7 | Conference presentation 1 | 6 | DEC | |
| D.8 | Conference Presentation 2 | 6 | DEC | |
| D.9 | Peer reviewed paper | 5 | DEC | |
| D.10 | School/Workshop Proceedings | 6 | DEC | |
| D.11 | Website | 6 | DEM | |
| D.12 | Intermediate progress report (1st year) | 7 | R | |
| D.13 | Intermediate progress report (2nd year) | 7 | R | |
| D.14 | Final project report | 7 | R |
| M. Number | Milestone Name | WP | Due Date | Means of Ve. |
|---|---|---|---|---|
| M.1 | Software Specifications | 1 | 3 | Report |
| M.2 | Software Release v1.0b1 | 2 | 12 | Beta Release |
| M.3 | Validation of Software release v1.0b1 | 4 | 14 | Report |
| M.4 | Software Release v1.0b2 | 3 | 16 | Beta Release |
| M.5 | Software Release v1.0b3 | 3 | 18 | Beta Release |
| M.6 | Software Release v1.0b4 | 3 | 20 | Beta Release |
| M.7 | Validation of Software release v1.0b4 | 4 | 21 | Report |
