Pole Coordinates and Length of Day from Laser Ranging of Low Earth Orbiters

2021 ◽  
Vol 37 (5) ◽  
pp. 263-268
Author(s):  
V. Ya. Choliy
Keyword(s):  
Laser Ranging ◽  
Length Of Day

scholarly journals Polar Motion and Earth Rotation from Lageos Laser Ranging

1981 ◽  
Vol 63 ◽  
pp. 123-124 ◽  
Author(s):  
B. D. Tapley
Keyword(s):  
Earth Rotation ◽  
Polar Motion ◽  
Smoothing Parameter ◽  
Laser Ranging ◽  
Range Data ◽  
Length Of Day ◽  
Laser Range ◽  
International Polar ◽  
Short Arc

Laser ranging collected during the period from May 7 1976 through May 1981, has been used to determine polar motion and length of day (LOD) variations. Independent short-arc solutions of five days in length are used to obtain the polar motion and LOD results. The solutions obtained with these approaches are compared with BIH and Doppler solutions. With the Vondrak smoothing parameter of 10−7, the weighted RMS of the raw minus smoothed results is 0010 in x, 0008 in y and 0.28 msec in LOD. Finally, the results obtained during the MERIT campaign, an international polar motion intercomparison experiment, using both “quick-look” and the final processed laser range data are discussed.

scholarly journals Atmospheric Angular Momentum and the Length of Day

1981 ◽  
Vol 63 ◽  
pp. 171-172 ◽  
Author(s):  
R. B. Langley ◽  
R. W. King ◽  
I. I. Shapiro ◽  
R. D. Rosen ◽  
D. A. Salstein
Keyword(s):  
Angular Momentum ◽  
Zonal Wind ◽  
Atmospheric Angular Momentum ◽  
Laser Ranging ◽  
Length Of Day ◽  
Lunar Laser Ranging ◽  
Lunar Laser

AbstractWe have used lunar laser ranging (LLR) observations from the McDonald Observatory in conjunction with pole positions from the Bureau International de l’Heure (BIH) to determine the length of day (l.o.d.) at five-day intervals over the period 1971 through 1979. We compared the changes in these l.o.d. values to those inferred from determinations of the angular momentum of the global atmosphere, for the years 1976-1979, computed from twice-daily analyses of the zonal wind. These latter analyses were carried out by the National Meteorological Center, Camp Springs, MD. In both the observed (LLR) and the inferred (meteorological) values of changes in l.o.d., we have identified the near 50-day oscillation recently noted by Feissel and Gambis at the BIH. For the period of overlapping dates, the two oscillations agree closely in both amplitude and phase. The typical amplitude is about 0.2 milliseconds or approximately half the amplitude of the annual and semiannual variations in l.o.d.

Lunar Laser Ranging at CERGA for the ruby period (1981–1986)

1993 ◽  
pp. 189-193 ◽  
Author(s):  
C. Veillet ◽  
J. F. Mangin ◽  
J. E. Chabaubie ◽  
C. Dumolin ◽  
D. Feraudy ◽  
...  
Keyword(s):  
Laser Ranging ◽  
Lunar Laser Ranging ◽  
Lunar Laser
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