Ameriflux towers are recognized sources of highly quality, temporally resolved carbon flux. However, the spatial representatives of the ameriflux towers is not well characterized. A quantitative description of the tower footprint is critical when attempting to scale-up tower data as input into regional carbon cycle and climate change models. The Sky Arrow ERA aircraft equipped with NOAA's Mobile Flux Platform (MFP) will be flown in standard star patterns over each flux tower at Gainesville site. The flux data gathered from the sky arrow with first be matched directly over the tower. The plane will then (in patterns) on transects over the tower to compare fluxes measured by the tower to those acquired by the plane at distances from the tower of up to 10 km. The aircraft is in final configuration, and field mobilization is anticipated for September or October 2004. Given early termination and re- budgeting of these seed funds, the objectives were narrowed to the single objective stated and NIGECV funds were used to prepare the infrastructure for the field campaign.