GMT725 - EARTH GRAVITY FIELD MODELING
| Course Name | Code | Semester | Theory (hours/week) |
Application (hours/week) |
Credit | ECTS |
|---|---|---|---|---|---|---|
| EARTH GRAVITY FIELD MODELING | GMT725 | Any Semester/Year | 3 | 0 | 3 | 10 |
| Prequisites | None | |||||
| Course language | English | |||||
| Course type | Elective | |||||
| Mode of Delivery | Face-to-Face | |||||
| Learning and teaching strategies | Lecture Question and Answer Drill and Practice | |||||
| Instructor (s) | Assoc. Prof. Dr. Gonca OKAY AHÄ° | |||||
| Course objective | Introduction of Earth's static and temporal gravity field, its representations and processing. | |||||
| Learning outcomes |
| |||||
| Course Content | Application of precise gravity field models. Classical observations of the Earth's gravity field. Dedicated satellite missions. Gravity field modeling from Satellite to Satellite Tracking (SST) data. Approaches to gravity field modeling. Data processing strategy. Gravity field modeling from CHAMP data. Gravity field modeling from GRACE high low-SST data. Gravity field modeling from GRACE low low-SST data. Global Earth gravity field GOCE data analysis. GOCE and its use for a high-resolution global gravity combination model. Regionally refined gravity field models from in-situ data. Validation of satellite gravity field models by regional terrestrial data sets. Geoid determination with satellite methods. | |||||
| References | - Physical Geodesy, Heiskanen, W. E., Moritz, H., W.H. Freeman and Company, San Francisco, London, (1967). - Gravimetry, Torge, W., W. de Gruyter, Berlin - New York, (1989). - Advanced Physical Geodesy, Moritz, H., H. Wichman Verlag, Karlsruhe, (1980). - Methods for the Study of the External Gravitational Field and Figure of the Earth Molodensky, M. S., Eremeev, V. F., Yurkina, M. I., Israel Program of Scientific Translations, Jerusalem (Transl. from Russian), (1962). - Physical geodesy, Hofmann-Wellenhof, B. Moritz, H., Springer-Verlag Wien GmbH. Second, revised edition, (2006). | |||||
Course outline weekly
| Weeks | Topics |
|---|---|
| Week 1 | Application of precise gravity field models, Classical observations of the Earth?s gravity field |
| Week 2 | Dedicated satellite missions: CHAMP, GRACE and GOCE |
| Week 3 | Gravity field modeling from Satellite to Satellite (SST) data (gravity field and its functionals, reference frames, precise orbit determination) |
| Week 4 | Gravity field modeling from Satellite to Satellite (SST) data (gravity field and its functionals, reference frames, precise orbit determination) |
| Week 5 | Approaches to gravity field modeling from SST data |
| Week 6 | Data processing strategy for SST data (solution of Gauss-Markof Least-Squares parameter estimation model, synthesis and co-synthesis, data weighting, computation of residual accelerations) |
| Week 7 | Gravity field modeling from CHAMP data (motivations to refine the data processing strategy, orbit smoothing for computing reference accelerations, noise estimation) |
| Week 8 | Gravity field modeling from GRACE high-low-SST data (derivation of inter-satellite accelerations, computation of the reference inter-satellite accelerations, processing of non-gravitational inter-satellite accelerations) |
| Week 9 | Gravity field modeling from GRACE low-low-SST data (functional models, data processing methodology, least-squares adjustment) |
| Week 10 | Midterm Exam |
| Week 11 | From calibrated measurements to the global Earth gravity field GOCE data analysis |
| Week 12 | GOCE and its use for a high-resolution global gravity combination model |
| Week 13 | Regionally refined gravity field models from in-situ data |
| Week 14 | Validation of satellite gravity field models by regional terrestrial data sets |
| Week 15 | Preparation for the final exam |
| Week 16 | Final Exam |
Assesment methods
| Course activities | Number | Percentage |
|---|---|---|
| Attendance | 0 | 0 |
| Laboratory | 0 | 0 |
| Application | 0 | 0 |
| Field activities | 0 | 0 |
| Specific practical training | 0 | 0 |
| Assignments | 5 | 20 |
| Presentation | 0 | 0 |
| Project | 0 | 0 |
| Seminar | 0 | 0 |
| Midterms | 1 | 30 |
| Final exam | 1 | 50 |
| Total | 100 | |
| Percentage of semester activities contributing grade succes | 6 | 50 |
| Percentage of final exam contributing grade succes | 1 | 50 |
| Total | 100 | |
WORKLOAD AND ECTS CALCULATION
| Activities | Number | Duration (hour) | Total Work Load |
|---|---|---|---|
| Course Duration (x14) | 14 | 3 | 42 |
| Laboratory | 0 | 0 | 0 |
| Application | 0 | 0 | 0 |
| Specific practical training | 0 | 0 | 0 |
| Field activities | 0 | 0 | 0 |
| Study Hours Out of Class (Preliminary work, reinforcement, ect) | 14 | 10 | 140 |
| Presentation / Seminar Preparation | 0 | 0 | 0 |
| Project | 0 | 0 | 0 |
| Homework assignment | 5 | 12 | 60 |
| Midterms (Study duration) | 1 | 28 | 28 |
| Final Exam (Study duration) | 1 | 30 | 30 |
| Total Workload | 35 | 83 | 300 |
Matrix Of The Course Learning Outcomes Versus Program Outcomes
| D.9. Key Learning Outcomes | Contrubition level* | ||||
|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | |
| 1. Advances contemporary knowledge in the field of geomatics engineering based on novel thinking and research. | X | ||||
| 2. Possesses creative and critical thinking, problem solving, and decision making abilities. | X | ||||
| 3. Conducts a thorough novel research from scratch independently. | X | ||||
| 4. Acquires interdisciplinary knowledge of common terminology and joint working culture. | X | ||||
| 5. Cooperates with national and international scientific research groups. | X | ||||
| 6. Attains the capacity to publish an international peer-reviewed journal manuscript. | X | ||||
| 7. Maintains ethical responsibility. | X | ||||
| 8. Obtains the skills to teach undergraduate and graduate level courses offered in geomatics engineering. | X | ||||
| 9. Conducts verbal-written communication, surveys the literature, and prepares thesis in advanced level English. | X | ||||
*1 Lowest, 2 Low, 3 Average, 4 High, 5 Highest