Very Long Baseline Interferometry (VLBI) Geodetic Technical Reports

This is an index of Very Long Baseline Interferometry (VLBI) online Geodesy's Technical Papers either published in journals or presented by Geoscience Australia staff at recent meetings and conferences. Other category titles also available from the list below.

• Very Long Baseline Interferometry (VLBI)

• Antarctica
• Datum Transformations
• Global Positioning System (GPS)
• Local Ties
• Satellite Laser Ranging (SLR)
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Very Long Baseline Interferometry (VLBI)

• Title: OCCAM 5.0 VLBI Analysis Software Users Guide [PDF_82k]
  Date: September 2001
  Author: Oleg Titov, V. Tesmer & J. Bohm
  Summary: OCCAM 5.0 has new limits: 20 stations and 100 radio sources can be processed simultaneously. The number of baselines under study is 190, correspondingly. The current version of OCCAM supports International Earth Rotation and Reference Systems Service (IERS) Conventions 2000. The ephemeride DE405/LE405 takes the place of DE403/LE403. To correct subdiurnal EOP variations two models can be chosen: proposed by Ray (recommended by IERS Conventions 1996) and by Eanes (IERS Conventions 2000) which takes into account many more tidal terms. A new least squares approach based on the Gauss-Markov model is available with the new version.
  
• Title: Analysis of the EOPs from Independent Parallel VLBI Sessions [PDF_44k]
  Date: September 2001
  Forum: IAG 2001 Scientific Assembly
  Author: Oleg Titov
  Summary: Time series of Earth Orientation Parameters (EOP) have been obtained from independent parallel VLBI networks NEOS-A and CORE-A using OCCAM 5.0 software. This paper presents the results and their detailed consideration. The EOP time series are approximated by linear functions so offset and rate of the differences NEOS – CORE can be estimated. It appears that biases between two EOP systems are negligibly small in 1996-1997 years but are increasing in time. VLBI observations provide high-accurate EOPs (both pole components as well as UT1-UTC) for world scientific community. For example, site positions adjusted from space geodetic global or regional networks relate to direction and spin of the Earth axes. Therefore for International Earth Rotation and Reference Systems Service (IERS) it is important to distribute as accurate EOP values as possible.
  

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