This preview shows page 1. Sign up to view the full content.
Unformatted text preview: Space Systems Engineering I HW #3 1. NASA wants to move a malfunctioning spacecraft from a circular orbit at 500km altitude to one at 150km altitude, so a Shuttle crew can repair it. a. What is the energy of the transfer orbit? b. What is the velocity change (!V1) needed to go from the initial circular orbit into the transfer orbit? c. What is the velocity change (!V2) needed to go from the transfer orbit to the final circular orbit? d. What is the time (TOF) required for the transfer? 2. A new research spacecraft is designed to measure the environment in the tail of Earth’s magnetic field. It’s in a circular parking orbit with a radius of 12,756 km. What !V will take the spacecraft to the boundary of Earth’s SOI such that it arrives there with zero velocity with respect to Earth? 3. To continue the studies of Venus begun by the Magellan probe, NASA is sending a remote‐ sensing spacecraft to that planet. a. Find the semimajor axis and specific mechanical energy of the transfer orbit. b. Find V" Earth c. Find V" Venus d. Find !Vboost e. Find !Vretro f. Find !Vmission g. Find the time of flight (TOF) for the mission ...
View Full Document
This note was uploaded on 04/26/2011 for the course MEM 373 taught by Professor Jinkang during the Spring '11 term at Drexel.
- Spring '11