Potentialities of Lunar laser range-differencing for measuring the Earth's orientation

1980 ◽  
Vol 54 (1) ◽  
pp. 55-68
Author(s):  
A. Leick
Keyword(s):  
Lunar Laser Range ◽  
Laser Range ◽  
Lunar Laser

Afcrla Lunar Laser Range And Photography Instrumentation

1967 ◽  
Author(s):  
D. H. Eckhardt, ◽  
M. S. Hunt ◽  
R. L. Iliff
Keyword(s):  
Lunar Laser Range ◽  
Laser Range ◽  
Lunar Laser

scholarly journals Expected Use of Lunar Range Data to Determine Modified Nutation Terms

1980 ◽  
Vol 78 ◽  
pp. 127-128
Author(s):  
P. L. Bender
Keyword(s):  
Angular Position ◽  
Gravitational Theory ◽  
Range Data ◽  
The Moon ◽  
Lunar Laser Range ◽  
Laser Range ◽  
Lunar Laser ◽  
Lunar Ephemeris ◽  
The Mean

The lunar laser range data from the McDonald Observatory in Texas have been used so far to determine major improvements in the lunar ephemeris and librations, to provide a new test of gravitational theory, and to determine single-day UT0 values on about 200 days during the period 1970-1974. The mean uncertainty in the UT0 values is 0.5 msec, and the smallest uncertainty is 0.2 msec (Stolz et al. 1976). The changes in the angular position of the moon with time are believed to be well enough known so that their uncertainty does not substantially degrade the accuracy of the UT0 values.

scholarly journals Results from Lunar Laser Ranging Data Analysis

1981 ◽  
Vol 63 ◽  
pp. 209-216
Author(s):  
J. O. Dickey ◽  
J. G. Williams ◽  
C. F. Yoder
Keyword(s):  
Data Analysis ◽  
Laser Ranging ◽  
Range Data ◽  
Lunar Laser Ranging ◽  
Lunar Laser Range ◽  
Laser Range ◽  
Secular Acceleration ◽  
Lunar Laser ◽  
Geocentric Coordinates

AbstractThe lunar laser range data taken at McDonald Observatory between August 1969 and May 1980 has been analyzed. The simple rms residual for the 2954 ranges is 31 cm. Results of the analysis include GMearth = 398600.45±0.02 km3/sec2 and a secular acceleration of the lunar orbital mean longitude of ṅ = −23.8±1.5“/century2 which yields a Q of 12.3 at semidiurnal frequencies. The lunar harmonic C30 is (−8.7 ± 1.1) × 10−6 and the lunar rotational dissipation k2mT = (4.7 ± 0.5) × 10−3 day. Also resulting from the solution are geocentric coordinates of McDonald accurate to 30 cm, including the first value for the longitude with the new IAU constants and a dynamical equinox.

Results from lunar laser ranging (summary only)

1977 ◽  
Vol 284 (1326) ◽  
pp. 587-587
Keyword(s):  
Three Dimensional ◽  
Lunar Laser Ranging ◽  
Lunar Laser Range ◽  
Lunar Laser ◽  
Inertia Parameters ◽  
Null Value ◽  
Rotation Of The Earth ◽  
The Moment ◽  
Geocentric Coordinates ◽  
Better Than

Over 1500 lunar laser range measurements have been made during the past six years at McDonald Observatory. These data have been fitted with a 41 cm r. m. s. residual. The geocentric coordinates of McDonald Observatory are now known to better than 1 m, the three-dimensional coordinates of the Moon and the selenocentric coordinates of the retroreflectors are accurate to about 25 m, and the mass ratio Sun/(Earth + Moon) is determined to 2 parts in 107. A search for the Nordtvedt term in the Moon’s orbit, a term predicted by some relativity theories, gives a null value, a result consistent with general relativity. The measurement of the physical librations determines very accurately the moment of inertia parameters β = (C - A)/B and γ = (B - A)/C, and significantly determines the third degree gravitational harmonics C 30 , C 32 , S 32 and S 33 The postfit residuals are not random but yield corrections to the rotation of the Earth, values of U. T. 0 for individual days having typical accuracies of 0.5 ms (20cm). The anticipated regular operation of two or more stations will allow the separation of U. T. 1 and polar motion.

Military laser range safety

1990 ◽  
Author(s):  
James K. Franks
Keyword(s):  
Laser Range

MATILDA: A Military Laser Range Safety Tool Based on Probabilistic Risk Assessment (PRA) Techniques

2014 ◽  
Author(s):  
Paul Kennedy ◽  
Brian K. Flemming ◽  
David G. Devoy ◽  
Daniel F. Huantes ◽  
Matthew D. Flowers
Keyword(s):  
Risk Assessment ◽  
Probabilistic Risk Assessment ◽  
Laser Range ◽  
Probabilistic Risk

scholarly journals Kalman filter orbit improvement from Kootwijk laser range observations

1981 ◽  
Vol 1 (6) ◽  
pp. 79-82 ◽  
Author(s):  
K.F. Wakker ◽  
B.A.C. Ambrosius ◽  
J.J.P. van Hulzen
Keyword(s):  
Kalman Filter ◽  
Laser Range ◽  
Orbit Improvement
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