Hello, Here is current Progress M-34 EFG vector. EFG - Earth Fixed Greenwich coordinate system with X axis in the palne of TRUE EARTH EQUATOR (precession and nutation components are taking into account) at the TIME OF VECTOR and directed from Earth' mass center to point of crossing of the true equator and Greenwich prime meridian, Z axis is perpendicular to the true equator plane and directed from Earth' mass center to the north pole, Y axis completes system to the right-hand. Orbit #30 Date 08.04.1997 Time 11:07:33.909 UT X 1.98993414 km Y 6.34470844 km Z -0.00000003 km Vx -4.12193389 km/s Vy 1.27401626 km/s Vz 6.07023564 km/s Nodal period 89.5986 min Inclination 51.6698 deg (calculated osculating value in respect to the true equator at the time of equator crossing) Hmin 242.329 km ) heights are calculated above Earth's ellipsoid Hmax 286.952 km ) with a=6378136 m, alfa=298.25784 H asc.node 271.31 km Arg. of perig. 115.1258 deg ) calculated osculating values at the time of Eccentr. 0.0025541188 ) the orbit's equator crossing Semimaj. axis 6642280.285 m ) RAAN 1950.0 76.4861 deg Best regards, Vladimir Agapov. -- Vladimir M. Agapov | Ballistic Center of Moscow, Russia | the Keldysh Institute of Applied Mathematics RAN | Moscow, Russia | tel. +7-095-333-8067 (work), e-mail: avm@kiam1.rssi.ru