Shanghai;
Observatory,;
Chinese;
Academy;
of;
Sciences,;
Shanghai;
200030,;
China;
Shanghai;
Observatory,;
Chinese;
Academy;
of;
Sciences,;
Shanghai;
200030,;
China;
Shanghai;
Observatory,;
Chinese;
Academy;
of;
Sciences,;
Shanghai;
200030,;
China;
Shanghai;
Observatory,;
Chinese;
Academy;
of;
Sciences,;
Shanghai;
200030,;
China;
Shanghai;
Observatory,;
Chinese;
Academy;
of;
Sciences,;
Shanghai;
200030,;
China;
Shanghai;
Observatory,;
Chinese;
Academy;
of;
Sciences,;
Shanghai;
200030,;
China;
Czech;
Technical;
University,;
Brehova;
7,;
115;
19;
Prague;
1,;
Czech;
Republic;
Czech;
Technical;
University,;
Brehova;
7,;
115;
19;
Prague;
1,;
Czech;
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satellite; laser; ranging; (SLR),; ranging; precision,; systematic; bias,; picosecond; event; timer; (PET).;