Resonant orbit dynamics and closed loop control of GPS and GEO constellations / (Record no. 179359)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 04442namaa22004571i 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | EG-GICUC |
| 005 - أخر تعامل مع التسجيلة | |
| control field | 20260409213211.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 260409s2025 ua a|||frm||| 000 0 eng d |
| 040 ## - CATALOGING SOURCE | |
| Original cataloguing agency | EG-GICUC |
| Language of cataloging | eng |
| Transcribing agency | EG-GICUC |
| Modifying agency | EG-GICUC |
| Description conventions | rda |
| 041 0# - LANGUAGE CODE | |
| Language code of text/sound track or separate title | eng |
| Language code of summary or abstract | eng |
| -- | ara |
| 049 ## - Acquisition Source | |
| Acquisition Source | Deposit |
| 082 04 - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Classification number | 520.93 |
| 092 ## - LOCALLY ASSIGNED DEWEY CALL NUMBER (OCLC) | |
| Classification number | 520.93 |
| Edition number | 21 |
| 097 ## - Degree | |
| Degree | Ph.D |
| 099 ## - LOCAL FREE-TEXT CALL NUMBER (OCLC) | |
| Local Call Number | Cai01.12.01.Ph.D.2025.Za.R |
| 100 0# - MAIN ENTRY--PERSONAL NAME | |
| Authority record control number or standard number | Zeinab Ahmed Mabrouk Affan, |
| Preparation | preparation. |
| 245 10 - TITLE STATEMENT | |
| Title | Resonant orbit dynamics and closed loop control of GPS and GEO constellations / |
| Statement of responsibility, etc. | by Zeinab Ahmed Mabrouk Affan ; Supervisors Prof. Dr. Mohamed Abdelaziz Mohamed Rassem, Prof. Dr. Fawzy Ahmed Abd El-Salam Abd El-Rahman, Dr. Ashraf Hamdy Mohamed Owis, Dr. Wesam Mohammed Kamel Elmahy. |
| 246 15 - VARYING FORM OF TITLE | |
| Title proper/short title | ديناميكيات المدار الرنيني والتحكم المغلق الحلقة للكوكبتان”GPS” و ”GEO” |
| 264 #0 - PRODUCTION, PUBLICATION, DISTRIBUTION, MANUFACTURE, AND COPYRIGHT NOTICE | |
| Date of production, publication, distribution, manufacture, or copyright notice | 2025. |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 108 pages : |
| Other physical details | illustrations ; إيض |
| Dimensions | 25 cm. + |
| Accompanying material | CD. |
| 336 ## - CONTENT TYPE | |
| Content type term | text |
| Source | rda content |
| 337 ## - MEDIA TYPE | |
| Media type term | Unmediated |
| Source | rdamedia |
| 338 ## - CARRIER TYPE | |
| Carrier type term | volume |
| Source | rdacarrier |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | Thesis (Ph.D)-Cairo University, 2025. |
| 504 ## - BIBLIOGRAPHY, ETC. NOTE | |
| Bibliography, etc. note | Bibliography: pages 104-108. |
| 520 #3 - SUMMARY, ETC. | |
| Summary, etc. | This thesis aims to address two main studies. The first study aims to understand <br/>how resonant geopotential harmonics affect the semi-major axis of GPS orbits. The <br/>study uses a second-order approximation to calculate iteratively the impact of <br/>higher zonal perturbations. The study also investigates motion around the stable and <br/>metastable points using the Poincare method, demonstrating the existence of <br/>periodic, quasi-periodic, and chaotic orbits near these positions. In the second study, <br/>we explored how to mitigate these geopotential effects through the application of a <br/>closed-loop control method applied to GEO satellites. A closed-loop control law is <br/>derived analytically and incorporated into the equations of motion in a rotating <br/>Cartesian frame of reference. |
| 520 #3 - SUMMARY, ETC. | |
| Summary, etc. | هذه الرسالة تقوم علي دراستان, الدراسة الأولي تهدف إلي فهم تأثيرالتوافقيات التثاقليةالمناطقيةوالمربعيةوالقطاعيةالرنينيةلدالةجهدالأرضعلي نصف المحور الرئيسي لمدارات أقمار نظام تحديد المواقع العالميGPS. تم استخدام تقريب من الرتبة الثانية لحساب التأثيرالتكراري للاضطرابات المناطقيةمنرتبعلياعلىنصف المحور الرئيسي. كما تناولت الدراسة تحليل الحركة في محيط النقاط المستقرة وشبة المستقرة باستخدام طريقة بوانكاريه، مما أظهر وجود مدارات دوريةوشبه دوريةوفوضوية بالقرب من تلك المواضع. اما الدراسة الثانية فتدرس كيفية حذف هذه التاثيرات التوافقيات التثاقليةالمناطقيةوالمربعيةوالقطاعيةالرنينيةلدالةجهدالأرضعن طريق استخدام طريقة التحكم المغلق الحلقة وتطبيقها علي كوكبة الGEO . تم إشتقاق قانون التحكم المغلق الحلقة المناسب ثم اضافته في معادلة الحركة المشتقة في الاحداثيات الكارتيزية الدورانية . |
| 530 ## - ADDITIONAL PHYSICAL FORM AVAILABLE NOTE | |
| Issues CD | Issues also as CD. |
| 546 ## - LANGUAGE NOTE | |
| Text Language | Text in English and abstract in Arabic & English. |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Mathematical Astronomy |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | الفلك الرياضي |
| 653 #1 - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Resonant orbits |
| -- | Gravitational harmonic perturbations |
| -- | GPS |
| -- | GEO |
| -- | Closed loop control |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Mohamed Abdelaziz Mohamed Rassem |
| Relator term | thesis advisor. |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Fawzy Ahmed Abd El-Salam Abd El-Rahman |
| Relator term | thesis advisor. |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Ashraf Hamdy Mohamed Owis |
| Relator term | thesis advisor. |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Wesam Mohammed Kamel Elmahy |
| Relator term | thesis advisor. |
| 900 ## - Thesis Information | |
| Grant date | 01-01-2025 |
| Supervisory body | Mohamed Abdelaziz Mohamed Rassem |
| -- | Fawzy Ahmed Abd El-Salam Abd El-Rahman |
| -- | Ashraf Hamdy Mohamed Owis |
| -- | Wesam Mohammed Kamel Elmahy |
| Universities | Cairo University |
| Faculties | Faculty of Science |
| Department | Department of Astronomy, Space Science and Meteorology |
| 905 ## - Cataloger and Reviser Names | |
| Cataloger Name | Shimaa |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Dewey Decimal Classification |
| Koha item type | Thesis |
| Edition | 21 |
| Suppress in OPAC | No |
| Source of classification or shelving scheme | Home library | Current library | Date acquired | Inventory number | Full call number | Barcode | Date last seen | Effective from | Koha item type |
|---|---|---|---|---|---|---|---|---|---|
| Dewey Decimal Classification | المكتبة المركزبة الجديدة - جامعة القاهرة | قاعة الرسائل الجامعية - الدور الاول | 09.04.2026 | 93717 | Cai01.12.01.Ph.D.2025.Za.R | 01010110093717000 | 09.04.2026 | 09.04.2026 | Thesis |