TY - JOUR AU - S. Gurtu PY - 2014/02/19 Y2 - 2024/03/29 TI - Time Variation of Orbital Parameters of an Equatorial Satellite JF - Defence Science Journal JA - DSJ VL - 31 IS - 4 SE - General Papers DO - 10.14429/dsj.31.6372 UR - https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/6372 AB - A few orbital parameters which take into account earth's finite shape as well as its axial rotation are developed for a satellite moving in the earth's equatorial plane. Expressions for line of sight velocity dr/sub es//dt, variation of elevation angle, and the condition for satellite's accessibility from a ground station are obtained. For a non-rotating earth equations for variation of arc length D/sub c/ and segment area A/sub s/ are derived. The various parameters are plotted against time for different orbital eccentricities. ER -