approach and landing test

This is probably a commemorative contractor patch. I am not sure if it is "IGA" or "LGA". Modern embroidery style. 

Lion Brothers version. One of the most highly-sought LB patches. Easily recognized by the larger "USA" on the wing as well as cloth back.

The nine-month-long ALT program was conducted from February through November 1977 at the Dryden Flight Research Facility and demonstrated that the orbiter could fly in the atmosphere and land like an airplane, except without power-gliding flight. Two NASA astronaut crews-Fred Haise and Gordon Fullerton and Joe Engle and Dick Truly-took turns flying the 150,000-pound spacecraft to free-flight landings.