Approximate Solution of Required Velocity in Elliptical Earth Model Using Piecewise Linear

Mohsen Dehghani Mohammad-Abadi; Seyed Hamid Jalali Naini

Volume 9, Issue 3 , December 2016, , Pages 1-12

Abstract
  In this paper, an approximate solution of required velocity with final position constraint is derived using a piecewise linear gravity assumption for elliptical earth model. In this approach, the total flight time is divided into several time intervals and the gravitational acceleration is assumed to ...  Read More

Implicit Guidance Equations in Polar Coordinates

Seyed Hamid Jalali Naini

Volume 7, Issue 4 , January 2015, , Pages 1-9

Abstract
  In this paper, implicit guidance equations are derived in polar coordinates. Depending on applications, implicit guidance equations in polar coordinates may be preferred over cartesian coordinates. Moreover, depending on the type of guidance problem, analytical solutions for sensitivity matrices may ...  Read More