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A NASA sounding rocket for high-contrast imaging with a visible nullingcoronagraph, the PICTURE payload, has made two suborbital attempts to observethe warm dust disk inferred around Epsilon Eridani. The first flight in 2011demonstrated a 5 milliarcsecond fine pointing system in space. The reducedflight data from the second launch, on 25 November 2015, presented herein,demonstrate active sensing of wavefront phase in space. Despite severalanomalies in flight, post-facto reduction phase stepping interferometer dataprovides insight into the wavefront sensing precision and the system stabilityfor a portion of the pupil. These measurements show the actuation of a32$\times$32-actuator microelectromechanical system deformable mirror. Thewavefront sensor reached a median precision of 1.4 nanometers per pixel, with95% of samples between 0.8 and 12.0 nanometers per pixel. The median systemstability, including telescope and coronagraph wavefront errors other than tip,tilt, and piston, was 3.6 nanometers per pixel, with 95% of samples between 1.2and 23.7 nanometers per pixel.

Wavefront Sensing in Space: Flight Demonstration II of the PICTURE Sounding Rocket Payload