version 2 Source: IERS Bulletin A ( 0_ 0_ ) Orbits: to be used with the IGS Prediction Service Orbits (IGP) MJD Xpole Ypole UT1-UTC LOD Xsig Ysig UTsig LODsig Nr Nf Nt (10**-6") (0.1 usec) (10**-6") (0.1 usec) 51681.50 91112 328354 2254805 9147 2175 2147 1506 0 0 0 0 51682.50 91405 327743 2246552 7359 4650 4650 4024 0 0 0 0 51683.50 91630 327064 2240018 5709 5407 5407 5946 0 0 0 0