Simplify the following text for a Grade 9 native English-speaking person.
Original: In 2004-05 , a large camp , Thwaites ( THW ) was established by the USAP 150 km north of NBY , in order to support a large airborne geophysical survey of eastern Marie Byrd Land by the University of Texas Institute for Geophysics .
Simplified: In 2004-05 , a large camp , Thwaites ( THW ) , was made by the USAP 150 km north of NBY . This was in order to support a large airborne geophysical survey of eastern Marie Byrd Land by the University of Texas Institute for Geophysics .