At the point of the sonic blast, a convective "turret" is seen in the meteor trail and thermal infrared satellite imagery indicates the temperature of the trail at this point was -67 degrees Celsius (-88.6°F), placing it in the middle stratosphere (about 25-30 km or 15 to 19 miles above Earth's surface).
With several satellites monitoring the event, and each with its own perspective, assigning a trajectory to the meteor provided the atmospheric scientists with an extreme case of what happens when high-altitude objects are being viewed at high observer zenith angles, producing what's called a "parallax effect," when every perspective seems to give a different answer as to what the trajectory really should be. Usually this isn't a problem when dealing with meteorological events, "for most tropospheric clouds and viewing conditions, parallax effects are minor," the authors report.
But by knowing the exact location of each satellite the scientists were able to remove the displacement problems. Miller and his team concluded that the Russian meteor had a 282.7 ± 2.3° azimuth of trajectory, with a 18.5 ± 3.8° slope to the horizontal, which they report "compared favorably" with estimates based on photographs and video documents of the event. The trajectory also indicates that the meteorite pulled out of Lake Chebarkul did not travel in a straight line, but rather decelerated as it fell through the lower atmosphere in a parabolic descent.