- Sojourner is unique among the 4 rovers to successfully deploy on Mars in that it required - it's lander to stay in communication with Earth. The rover was not equipped with a high gain - antenna, which is required in order to communicate with Earth over large distances. -
-- This limitation forced the rover to stay within a certain range of the lander, and - throughout it's lifetime on Mars, it never traveled more than a few dozen feet from the - lander. -
-- Sojourner was designed to study the surface of Mars by collecting and analyzing rock - samples, taking pictures and more using the following tools: + Spirit was equipped with all of the tools necessary to complete much more advanced + geological + inspections and discoveries during it's 90-sol mission. Some tools were made to assist with + making smarter choices for what to inspect, and some tools were made to make better + analyses.
- Sojourner was an important step in Robotics due to the nature of the mission. - With such a long distance between Mars and Earth, radio communications took around 14 - minutes to receive, and then another 14 minutes to send back. -
-- As such, human telegraphed movements too slow for the mission, and while complete autopilot - is impossible for such a complex mission, the rovers, landers, and spacecraft made by NASA - had to be programmer with autopilot. -
-- To solve this problem, Sojourner, along with every rover to land on Mars, is equipped with - software dedicated to autonomously moving the rover across the martian surface. -
-- While Sojourner was comparatively basic in it's software's autonomy, the software was - helpful to operators in visualizing and telegraphing instructions across the rocky terrain - of Ares Vallis. + Each Rover that lands on Mars gets bigger and better - Spirit and Opportunity were the first + to show Sojourner this, their dimensions beating Sojourner in each axis by 5 (minimum). + Solar panels, wheels, and the tools at their disposal increased too.
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"In-situ Exploration and Sample Return: Autonomous Planetary Mobility"
- https://mars.nasa.gov/mer/mission/technology/autonomous-planetary-mobility/
+ https://mars.nasa.gov/mer/mission/technology/autonomous-planetary-mobility/