|Aircraft at HFM - Cessna TU206||Map of Harvard Forest, Massachusetts|
|Inlet at HFM is on the right side of the plane’s wing|
Samples were collected over the forest lands of Harvard Forest in north central Massachusetts. In addition to providing a vertical profile of carbon cycle gas measurements in this area, HFM samples were also used to help calibrate the Measurement Of Pollution In The Troposphere (MOPITT) instrument flown aboard NASA's Earth System Enterprise (ESE) Terra satellite. Sample collection at HFM started in November 1999, but the site was discontinued in December 2007 because of funding cuts. These flights were conducted by Dick Hordom of Four Star Aviation.