|Aircraft at PFA - Piper PA 31-325||Map of Poker Flat, Alaska|
|Inlet at PFA is on the front right window of the plane|
Samples are collected over the forest land of Poker Flat Research Range northeast of Fairbanks, Alaska. In addition to providing a vertical profile of carbon cycle gas measurements in this area, PFA 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 PFA started in June 1999.