Optimizing Mars Missions: Transfer Orbit and Launch Windows Quiz
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Questions and Answers

How often do Mars and Earth have a suitable position for a transfer orbit?

  • Every 6 months
  • Every 18-24 months
  • Every 25-26 months (correct)
  • Every 12 months
  • What is the time window for spacecraft launch from Earth to Mars?

  • Around 6-8 weeks
  • Around 3-4 days
  • Around 1 month
  • Around 2-3 weeks (correct)
  • Why is autonomous navigation needed for Mars orbit insertion and Entry-Descent-Landing on Mars?

  • For faster communication between Mars and Earth
  • To conserve spacecraft fuel
  • To avoid space debris near Mars
  • Due to the distance between Mars and Earth causing a signal delay of 5-20 minutes (correct)
  • How long does it take for a spacecraft to complete half-a-transfer-orbit from Earth to Mars?

    <p>Around 260 days</p> Signup and view all the answers

    Which factor influences fuel consumption in Mars missions?

    <p>Orbit diameter</p> Signup and view all the answers

    What is the most fuel-efficient orbit to reach Mars according to the text?

    <p>One that reaches Mars on the farthest point from the Sun</p> Signup and view all the answers

    What is the main purpose of spacecraft structure?

    <p>To carry loads and protect other spacecraft parts</p> Signup and view all the answers

    Which type of materials are typically used for spacecraft structure?

    <p>Light-weight materials</p> Signup and view all the answers

    What is the role of thermal control in a spacecraft?

    <p>To maintain specified temperature levels of spacecraft hardware</p> Signup and view all the answers

    Which heat transport mechanisms are mentioned in the text?

    <p>Thermal conduction, thermal convection, thermal radiation</p> Signup and view all the answers

    Why is it essential for thermal control to function throughout the spacecraft's life?

    <p>To maintain hardware temperatures in all situations</p> Signup and view all the answers

    What type of testing is mentioned in relation to spacecraft structure?

    <p>Vibration testing</p> Signup and view all the answers

    When did the scientists from CU/LASP and UCB/SSL propose the MAVEN mission to NASA?

    <p>2003</p> Signup and view all the answers

    What was the cost limit per mission for proposals to NASA's 'Mars Scout Program'?

    <p>US $450 million</p> Signup and view all the answers

    How many missions were proposed to NASA's program in 2007?

    <p>20</p> Signup and view all the answers

    Which entity had a leading role in the Mars mission MAVEN according to the text?

    <p>CU/LASP</p> Signup and view all the answers

    What happened to the 'Mars Scout Program' after being proposed by the MAVEN mission team?

    <p>It was integrated into NASA's 'Discovery Program'</p> Signup and view all the answers

    How many finalists were selected from the 20 missions proposed to NASA's program in 2007?

    <p>2</p> Signup and view all the answers

    What was the reason behind the postponement of launches for some Mars missions?

    <p>Delays due to launch windows from Earth to Mars</p> Signup and view all the answers

    Why do space missions like those to Mars face complications or failures?

    <p>Obstacles during the journey</p> Signup and view all the answers

    What is one of the key tasks of a project management team for space missions?

    <p>Cost management</p> Signup and view all the answers

    Why are launch windows from Earth to Mars limited to specific time frames?

    <p>Due to alignment of Earth and Mars orbits</p> Signup and view all the answers

    What was the main reason behind selecting the MAVEN mission for full development in 2008?

    <p>Lowest risk and best scientific value</p> Signup and view all the answers

    Apart from delays, what other real-world problems can project management of space missions involve?

    <p>Reorganizations and obstacles</p> Signup and view all the answers

    What method is primarily used for heat exchange between spacecraft and the space environment?

    <p>Radiation</p> Signup and view all the answers

    In thermal control engineering, what temperature range is considered as conventional?

    <p>Between 120 K and 420 K</p> Signup and view all the answers

    What is the purpose of cooling light sensors on spacecraft to cryogenic temperatures?

    <p>Reduce thermal noise</p> Signup and view all the answers

    Why is compensating for temperature differences important in thermal control for spacecraft?

    <p>To reduce instrument mis-orientation</p> Signup and view all the answers

    At what temperature range are high-temperature protection systems utilized in thermal control engineering?

    <p>Above 420 K</p> Signup and view all the answers

    What is a common purpose of thermal radiators on spacecraft?

    <p>Radiate heat into space</p> Signup and view all the answers

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