Opportunity is making excellent progress towards Endeavour crater with only 2.3 kilometers (1.4 miles) to go before reaching the first landfall on the rim, a place called "Spirit Point."
The Astronomical Research Center (A.R.C) mentioned that the rover drove southeast on four sols, Sols 2629, 2630, 2633 and 2634 (June 17, 18, 21 and 22, 2011), totaling more than 380 meters (1,247 feet).
With all this driving, which requires many seconds on the rover's inertial measurement unit (IMU), regular sun finds, called Quick Fine Attitudes (QFA) are performed to correct for expected drift in the rover's gyros.
A QFA was performed on Sol 2633 (June 21, 2011). Over the three-sol weekend plan, an overnight Alpha Particle X-ray Spectrometer (APXS) measurement of atmospheric argon was performed on Sol 2631 (June 19, 2011).
With the improve energy production from cleaner solar arrays, on Sol 2634 (June 22, 2011), an early morning wakeup for an AM ultra-high frequency (UHF) relay pass was implemented to return more data from the rover.
As of Sol 2634 (June 22, 2011), solar array energy production was 505 watt-hours with an atmospheric opacity (Tau) of 0.926 and a solar array dust factor of 640.
Total odometry is 31,203.25 meters (31.20 kilometers, or 19.39 miles).