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    comc navigation structure General retroreflector info ilrs support center of mass site perf info

LAGEOS-1, -2

Center of Mass Information:

ref: Otsubo and Appleby, "System-dependent centre-of-mass correction for spherical geodetic satellites" Journal of Geophysical Research, 108, B4, 2201, doi:10.1029/2002JB002209, 2003.

The standard LAGEOS center-of-mass correction is 251 mm

correction for
single photon systems
edit level of npt
when npt formed		 com (mm)
none 242
3.0 245
2.5 247
2.0 250
correction for
C-SPAD (mm)
FWHM pulse width
(ps)
 edit level
of npt
when npt formed		 ave. num detected photons
0.1 1 10 100
1

 3.0 245 249 256 257
2.5 247 250 256 257
2.0 250 251 256 257
100

 3.0 245 247 251 252
2.5 246 248 251 252
2.0 249 249 251 252
correction for
leading-edge-half
maximum systems (mm)
FWHM pulse width (ps) com (mm)
1 256
100 252
300 248
1000 244
3000 243

Also see Arnold, David A., "Optical and Infrared Transfer Function of the LAGEOS Retroreflector Array", Smithsonian Institution Astrophysical Observatory, Cambridge, MA, May 1978.

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