Dynamical Determination of Origin and Scale in the Earth System from Satellite Laser Ranging

2002 ◽  
pp. 36-41 ◽  
Author(s):  
Erricos C. Pavlis
Keyword(s):  
Satellite Laser Ranging ◽  
Laser Ranging ◽  
Earth System ◽  
The Earth

scholarly journals Satellite laser ranging measurements in South Africa: Contributions to earth system sciences

2015 ◽  
Vol 111 (3/4) ◽  
pp. 1-9 ◽  
Author(s):  
Christina M. Botai ◽  
Ludwig Combrinck ◽  
Joel O. Botai
Keyword(s):  
South Africa ◽  
Satellite Laser Ranging ◽  
Laser Ranging ◽  
Earth System

scholarly journals Commission 19: Rotation of the Earth

1985 ◽  
Vol 19 (1) ◽  
pp. 193-205 ◽  
Author(s):  
Ya. S. Yatskiv ◽  
W. J. Klepczynski ◽  
F. Barlier ◽  
H. Enslin ◽  
C. Kakuta ◽  
...  
Keyword(s):  
Time Frame ◽  
Laser Ranging ◽  
Earth’S Rotation ◽  
The Moon ◽  
Earth's Rotation ◽  
The Earth ◽  
Long Time ◽  
Terrestrial Reference System ◽  
Rotation Of The Earth

During the period, work on the problem of the Earth’s rotation has continued to expand and increase its scope. The total number of institutions engaged in the determination of the Earth’s rotation parameters (ERP) by different techniques has been increased significantly. The rotation of the Earth is currently measured by classical astrometry, Doppler and laser satellite tracking, laser ranging of the Moon, and radio interferometry. Several long time series of the ERP are available from most of these techniques, in particular, those made during the Main Campaign of the MERIT project. The various series have been intercompared and their stability, in the time frame of years to days, has been estimated for the purposes of establishing a new conventional terrestrial reference system (COTES). On the other hand, the difficulties of maintaining a regular operation for laser ranging to the Moon (LLR) have been recognized. It resulted in the proposal to organize an one-month campaign of observations in 1985 in order to complement the COTES collocation program and to allow additional intercomparisons with other techniques.

Testing the gravitational interaction in the field of the Earth via satellite laser ranging and the Laser Ranged Satellites Experiment (LARASE)

2015 ◽  
Vol 32 (15) ◽  
pp. 155012 ◽  
Author(s):  
D M Lucchesi ◽  
L Anselmo ◽  
M Bassan ◽  
C Pardini ◽  
R Peron ◽  
...  
Keyword(s):  
Gravitational Interaction ◽  
Satellite Laser Ranging ◽  
Laser Ranging ◽  
The Earth

scholarly journals Passive Remote Study of the Aerosol in the Upper Atmosphere of the Earth

2019 ◽  
pp. 1-6
Author(s):  
Oleksandr Zbrutskyi ◽  
◽  
Nevodovskyi P ◽  
Anatoliy Vid’machenko ◽  
◽  
...  
Keyword(s):  
Global Warming ◽  
Energy Balance ◽  
Climate Changes ◽  
Upper Atmosphere ◽  
Anthropogenic Factors ◽  
The Sun ◽  
Earth System ◽  
Relative Contribution ◽  
The Earth

Climate changes on planet Earth are mainly caused by disturbances in the energy balance of the Sun-Earth system. This process is the result of both natural changes in nature and the influence of anthropogenic factors. The combined effect of these factors can lead to threatening phenomena for mankind - a decrease in the power of the ozone layer, the formation of “ozone holes” and global warming on the planet and other disasters. The study of the causes of these factors and the determination of their relative contribution is one of the pressing problems of our time.

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.

scholarly journals Evaluation of time change of the Love k2 and k3 numbers using LAGEOS SLR data

2017 ◽  
Vol 66 (3) ◽  
pp. 83-98 ◽  
Author(s):  
Marcin Jagoda ◽  
Miłosława Rutkowska ◽  
Katarzyna Kraszewska
Keyword(s):  
Time Evolution ◽  
Time Change ◽  
Satellite Laser Ranging ◽  
Laser Ranging ◽  
Change Over Time ◽  
Love Numbers ◽  
Over Time

In this paper, we present the estimated Love numbers for degree 2 and 3 (k2 and k3). The determination was based on the Satellite Laser Ranging (SLR) data of LAGEOS-1 and LAGEOS-2 satellites obtained within the period of January 1, 2014 until January 1, 2016. The results were compared with our previous determination of these parameters for the period from January 1, 2005 until January 1, 2007 to examine whether any systematic differences and time evolution occur. The adjusted values for the k2 and k3 parameters are, 0.29867±0.0001 and 0.0898±0.0047 (LAGEOS-1 data), respectively and 0.29858±0.0001 and 0.0867±0.0047 (LAGEOS-2 data). The discrepancies between the k2 and k3 values obtained in our previous paper [25] and this analysis are: –0.00293 (LAGEOS-1 data) and –0.00202 (LAGEOS-2 data) for k2 and –0.0091 (LAGEOS-1 data) and 0.0057 (LAGEOS-2 data) for k3. The obtained discrepancies in the k2 and k3 values may indicate their change over time. Keywords: tides, Love numbers, SLR, LAGEOS-1, LAGEOS-2

scholarly journals Determination of Coordinates for the Orroral Lunar Ranging Station

1981 ◽  
Vol 63 ◽  
pp. 305-311
Author(s):  
P. Morgan ◽  
R.W. King
Keyword(s):  
Laser Pulse ◽  
Pulse Shape ◽  
Single Mode ◽  
Laser Ranging ◽  
Mode Laser ◽  
Moon System ◽  
The Earth

AbstractUsing models of the Earth-Moon system developed from analysis of 10 years of laser ranging observations from the McDonald Observatory, we have analyzed observations obtained by the Orroral Lunar Ranging Station since April 1978. Normal point residuals from many of the observations performed before April 1980 using a 20 ns, mi tiple-mode laser pulse are discreetly spaced, as multiples of 6 ns, and may have been corrupted by variations in pulse shape. Further evaluation is required before these observations are used in scientific analyses. Observations performed during the MERIT Short Campaign (August - October 1980) using a 6 ns, single-mode pulse are apparently reliable. Using 27 single photoelectron events, obtained on 7 nights during this period, we have estimated the coordinates of Orroral, with respect to McDonald, with uncertainties of 1-2 m in cylindrical radius and longitude and 5-10 m in z-axis distance.

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