TY - RPRT TI - SPICE standards facilitate astrodynamic tasks AU - Acton, C. H. AU - Bachman, N. J. AU - Semenov, B. V. AU - Turner, F. S. AU - Wright, E. D. PY - 2001 UR - https://ntrs.nasa.gov/citations/20060031593 ID - 20060031593 ER -