A comparison between LAGEOS laser ranging and very long baseline interferometry determined baseline lengths

1985 ◽  
Vol 90 (B11) ◽  
pp. 9265 ◽  
Author(s):  
R. Kolenkiewicz ◽  
J. Ryan ◽  
M. H. Torrence
Keyword(s):  
Very Long Baseline Interferometry ◽  
Laser Ranging ◽  
Long Baseline

scholarly journals Current Status and Future Directions of the IERS RS/PC Predictions of UT1

2009 ◽  
Vol 5 (H15) ◽  
pp. 218-218 ◽  
Author(s):  
W. Wooden ◽  
B. Luzum ◽  
N. Stamatakos
Keyword(s):  
Global Positioning System ◽  
Very Long Baseline Interferometry ◽  
Current Status ◽  
Laser Ranging ◽  
Positioning System ◽  
Reference Systems ◽  
Future Directions ◽  
Long Baseline ◽  
Global Positioning ◽  
E Mail

The International Earth Rotation and Reference Systems Service (IERS) Rapid Service/Prediction Center (RS/PC) produces daily and weekly EOP combination and prediction solutions. The daily solutions are produced after 1700 UTC while the weekly EOP solutions are produced Thursday after 1700 UTC. These solutions include data from Atmospheric Angular Momentum (AAM) analysis and forecasts, Global Positioning System (GPS) solutions, Satellite Laser Ranging (SLR) solutions, and Very Long Baseline Interferometry (VLBI) solutions. The solutions are sent to roughly 700 people by e-mail per week and are picked up in roughly 40000 ftp downloads per month.

scholarly journals Agreements and Disagreements between Theories of Rigid Earth Nutation

1997 ◽  
Vol 165 ◽  
pp. 319-324
Author(s):  
J. Souchay
Keyword(s):  
Very Long Baseline Interferometry ◽  
Laser Ranging ◽  
Lunar Laser Ranging ◽  
Theoretical Determination ◽  
Long Baseline ◽  
The Earth ◽  
Lunar Laser ◽  
Rigid Earth ◽  
Good Agreement

AbstractThe necessity to elaborate a theory of nutation and precession matching the accuracy of very modern techniques as Very Long Baseline Interferometry and Lunar Laser Ranging led recently to various works. We discuss here the good agreement between those related to the nutation when considering the Earth as a solid body. In comparison we show the uncertainty concerning the modelisation of the transfer function leading to theoretical determination of the nutation coefficients when including dominant geophysical characteristics.

Where - A Software for geodetic Analysis

2020 ◽  
Author(s):  
Ingrid Fausk ◽  
Michael Dähnn ◽  
Ann-Silje Kirkvik
Keyword(s):  
Reference Frame ◽  
Software Package ◽  
Very Long Baseline Interferometry ◽  
Terrestrial Reference Frame ◽  
Test Phase ◽  
Laser Ranging ◽  
Operational Analysis ◽  
Long Baseline ◽  
Analysis Center ◽  
To Receive

<p><em>Where</em> is a software package developed by the Norwegian Mapping Authority (NMA). The software will provide a useful contribution to the International Terrestrial Reference Frame, by analysis of data from Very-long-baseline Interferometry (VLBI) and Satellite Laser Ranging (SLR).</p><div><em>Where</em> is written in Python, and is taking advantage of well-tested code like the SOFA and IERS libraries. The architecture is easily maintainable and extendable. Python makes it easy to write, and utilizes external libraries written in faster languages.</div><div> </div><div>Both the NMA and the Instituto Geografico Nacional, Spain, are in a test phase of deliveries of VLBI analysis results to the IVS with the <em>Where</em> software. After some improvements of the software, we will also deliver analysis results to the ILRS. Our goal is to receive full status as operational analysis center for both VLBI and SLR, and to contribute to ITRF2020.</div><div> </div><div>Sharing and cooperating with other institutions is made possible by making <em>Where</em> an open source project on GitHub.</div>

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