Standard co-ordinate system for ISS is defined as follows (from minus to plus direction): X axis: from Zvezda to Unity and PMA-2 Z axis: from ITS-P6 to ITS-Z1 to Unity to PMA-3 (ie. from zenith to nadir) Y axis: completes a right-hand co-ordinate system. Normal orientation is called X-POP ie. X-axis perpendicular to orbital plane, with +Z direction (ie. PMA-3) facing toward Earth. This orientation imparts minimum rotational momentum to ISS. During some dynamic opserations (dickings with STS, propulsive maneuvers using Zvezda engines) X-VV orientation is used: X-axis in velocity vector. Therefore the axes of PVAs will be oriented mainly in direction of flight. This in my opinion has an advantage in creating minimum aerodyamic farces aganist solar panels. -- Mgr. Antonin Vitek, CSc. Office: Main Library, Academy of Sciences of the Czech Republic Home: Kytin 127, CZ-25210 Mnisek p. B., Czech Republic Phone: +420 305 593865 - Coord.: 14.2194 deg E, 49.8488 deg N, 442 m ASL My satellite home page: http://www.lib.cas.cz/www/space.40/index.html ----------------------------------------------------------------- Unsubscribe from SeeSat-L by sending a message with 'unsubscribe' in the SUBJECT to SeeSat-L-request@lists.satellite.eu.org http://www2.satellite.eu.org/seesat/seesatindex.html
This archive was generated by hypermail 2b29 : Mon Dec 04 2000 - 12:13:47 PST