Base Files

2001-2003

From May 2001 - August 2003 the base receiver was a Trimble ProXR (mapping grade), supporting code (RTK and post-processed) and carrier phase (post-processed) corrections. Under optimal circumstances, code corrected data can deliver accuracy to within several meters, and carrier corrected data can deliver sub-meter accuracy. Toolik Field Station was closed from September to April during these years, and archived data from this period cover only the summer months.

2004-2011

In May 2004 the Toolik Field Station GPS Base was upgraded to a Trimble 5700 (survey grade), which supports survey and mapping grade corrections (RTK and post-processed). In April 2005, the base was upgraded to a Trimble NetRS (survey grade) which supports mapping and survey grade corrections (post-processed and RTK), and is configured through a web interface.

2011-Present

In May 2011, the Toolik Field Station GPS base station receiver was upgraded to a survey-grade Trimble NetR8 receiver. Our new NetR8 receiver offers the following improvements over our previous receiver: tracking GLONASS GPS satellites, faster operation speed, and increased onboard memory storage. Our NetR8 still supports mapping and survey grade corrections (post-processed and RTK). Since April 2006 Toolik Field Station has been in year-round operation, and our GPS archive contains an almost unbroken data string since that time