This is the 1979 Mooney M20K “231” that will be used to recreate Amelia Earhart’s historic circumnavigation on the 80th anniversary.
This is the 4th GPS antenna on the airplane. The first is for the IFD540 GPS/FMS, there is one for each of the air-data and attitude/heading reference units (ADAHRS), and now there is one for the dedicated GPS receiver for the new ADS-B traffic detection system. You can see one of the other antennas in the upper right of the image. There is another just off the edge of the image in the lower right.