Influence of Adopted Nutation Model on VLBI NEOS-Intensives Analysis

Abstract

Very Long Baseline Interferometry (VLBI) provides information about the Earth's rotation. Various observational programs have operated for different purposes since 1983. The purpose of the NEOS-Intensive program is to make observations of Universal Time (UT1-UTC). Short observational sessions (1-2 hours) include only the transcontinental baseline (Wettzell - NRAO20). Twenty to thirty individual scans are performed during the observational time. Only five parameters (i.e., wet delay for the reference station, wet delay for the second station, clock offset for the second station, clock rate for the second station, and UT1-UTC) are considered in the parametric model. The purpose of this paper is to investigate the influence of the adopted nutation model on the UT1-UTC estimates. VLBI data from the NEOS-Intensives were analyzed using the OCCAM 3.4 software. All reduction calculations were in accordance with the IERS Conventions 1996 (McCarthy, 1996). Conventional weighted least-squares method was used for the VLBI data analysis.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2000
Accession Number
ADA435880

Entities

People

  • Oleg Titov

Organizations

  • Saint Petersburg State University

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Data Analysis
  • Data Science
  • Errors
  • Fungi
  • Information Operations
  • Information Science
  • Interferometry
  • Least Squares Method
  • Observation
  • Observatories
  • Rotation

Readers

  • Astronomy and Astrophysics.
  • Positioning, Navigation, and Timing (PNT) Technology.
  • Regression Analysis.