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New Methods for Millimeter Ties at Kilometer Baselines, and Impact on Terrestrial Reference Frame Realizations
New Methods for Millimeter Ties at Kilometer Baselines, and Impact on Terrestrial Reference Frame Realizations
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260311091530.5
- ISBN
- 9798270231712
- DDC
- 526
- 저자명
- Rivera, Jullian
- 서명/저자
- New Methods for Millimeter Ties at Kilometer Baselines, and Impact on Terrestrial Reference Frame Realizations / Jullian Rivera
- 발행사항
- [Sl] : The University of Texas at Austin, 2025
- 형태사항
- 1 electronic resource (185 pages)
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-06, Section: B.
- 주기사항
- Advisors: Bettadpur, Srinivas Committee members: Chen, Jingyi; Jones, Brandon; Wilson, Clark; Magruder, Lori.
- 학위논문주기
- - Ph.D. : The University of Texas at Austin, 2025.
- 초록/해제
- 요약Terrestrial Reference Frames (TRFs) are the foundational geodetic infrastructure underlying all global positioning and applications utilizing globally referenced data. The application driving the strictest requirements on global positioning is sea level rise science which needs the underlying reference frame to be determined on the order of 1mm accuracy and 0.1mm/yr stability. Modern TRF such as the International Terrestrial Reference Frame (ITRF) are realized via the combination of four geodetic techniques: GNSS, SLR, VLBI, and DORIS. Reference stations around the globe precisely measure their coordinates using one of the four techniques. The geodetic techniques-derived coordinates are combined to realize the TRF via Helmert Transformations and independent surveys of the 3-D distance between co-located reference stations called local ties. The current set of local ties used in TRF realizations are single epoch discrete measurements of non-uniform quality poorly fit to the geodetic technique-derived station coordinates. In this dissertation, new methods are developed to survey and analyze the quality of 1-mm precision local ties at McDonald Geodetic Observatory in the Davis Mountains of West Texas with a near-kilometer baseline between reference stations and 120m difference in elevation, a first of its kind measurement pushing the standards for local tie surveying and reporting. Using local tie analogs derived from GNSS time series at MGO, possible variations in local ties at all sites are characterized, suggesting the limitations of the current practice of single epoch local tie surveying. A realistic TRF model based on real geodetic technique data is developed and used in simulations of simplified TRF combinations for investigating the impacts of different levels of variations and precisions in local ties, changes to the weight placed on local ties, and the utilization of high quality local ties such as those measured at MGO. The results support recommendations for the reassessment of the quality and utilization of the current set of local ties with full co-location site-characterizations in order to be usable with next-gen high quality local ties, and for updates to the current model for utilizing local ties in TRF combinations.
- 언어주기
- English
- 일반주제명
- Geophysics
- 일반주제명
- Atmospheric sciences
- 일반주제명
- Geology
- 기타저자
- The University of Texas at Austin Aerospace Engineering
- 기본자료저록
- Dissertations Abstracts International. 87-06B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260311091530.5
■006m o d
■007cr|nu||||||||
■020 ▼a9798270231712
■040 ▼aMiAaPQD▼beng▼cMiAaPQD▼erda
■082 ▼a526
■1001 ▼aRivera, Jullian▼eauthor.
■24510▼aNew Methods for Millimeter Ties at Kilometer Baselines, and Impact on Terrestrial Reference Frame Realizations ▼cJullian Rivera
■260 ▼a[Sl]▼bThe University of Texas at Austin▼c2025
■264 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a1 electronic resource (185 pages)
■336 ▼atext▼btxt▼2rdacontent
■337 ▼acomputer▼bc▼2rdamedia
■338 ▼aonline resource▼bcr▼2rdacarrier
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-06, Section: B.
■500 ▼aAdvisors: Bettadpur, Srinivas Committee members: Chen, Jingyi; Jones, Brandon; Wilson, Clark; Magruder, Lori.
■5021 ▼bPh.D.▼cThe University of Texas at Austin▼d2025.
■520 ▼aTerrestrial Reference Frames (TRFs) are the foundational geodetic infrastructure underlying all global positioning and applications utilizing globally referenced data. The application driving the strictest requirements on global positioning is sea level rise science which needs the underlying reference frame to be determined on the order of 1mm accuracy and 0.1mm/yr stability. Modern TRF such as the International Terrestrial Reference Frame (ITRF) are realized via the combination of four geodetic techniques: GNSS, SLR, VLBI, and DORIS. Reference stations around the globe precisely measure their coordinates using one of the four techniques. The geodetic techniques-derived coordinates are combined to realize the TRF via Helmert Transformations and independent surveys of the 3-D distance between co-located reference stations called local ties. The current set of local ties used in TRF realizations are single epoch discrete measurements of non-uniform quality poorly fit to the geodetic technique-derived station coordinates. In this dissertation, new methods are developed to survey and analyze the quality of 1-mm precision local ties at McDonald Geodetic Observatory in the Davis Mountains of West Texas with a near-kilometer baseline between reference stations and 120m difference in elevation, a first of its kind measurement pushing the standards for local tie surveying and reporting. Using local tie analogs derived from GNSS time series at MGO, possible variations in local ties at all sites are characterized, suggesting the limitations of the current practice of single epoch local tie surveying. A realistic TRF model based on real geodetic technique data is developed and used in simulations of simplified TRF combinations for investigating the impacts of different levels of variations and precisions in local ties, changes to the weight placed on local ties, and the utilization of high quality local ties such as those measured at MGO. The results support recommendations for the reassessment of the quality and utilization of the current set of local ties with full co-location site-characterizations in order to be usable with next-gen high quality local ties, and for updates to the current model for utilizing local ties in TRF combinations.
■546 ▼aEnglish
■590 ▼aSchool code: 0227
■650 4▼aGeophysics
■650 4▼aAtmospheric sciences
■650 4▼aGeology
■653 ▼aHelmert Transformations
■653 ▼aTerrestrial Reference Frames
■653 ▼aGlobal positioning
■653 ▼aGeodetic technique data
■7102 ▼aThe University of Texas at Austin▼bAerospace Engineering.▼edegree granting institution.
■7201 ▼aBettadpur, Srinivas▼edegree supervisor.
■7730 ▼tDissertations Abstracts International▼g87-06B.
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17361188▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
