Sol 8
Jet Propulsion Laboratory https://www.jpl.nasa.gov/ March 11, 2003
Sojourner takes a picture of one of its hazard-detecting laser stripes which is clearly visible against the Martian surface.
Photojournal note: Sojourner spent 83 days of a planned seven-day mission exploring the Martian terrain, acquiring images, and taking chemical, atmospheric and other measurements. The final data transmission received from Pathfinder was at 10:23 UTC on September 27, 1997. Although mission managers tried to restore full communications during the following five months, the successful mission was terminated on March 10, 1998.