Although balloon studies are inherently inaccurate, they are often required by local Zoning Boards for visual verification of a proposed structure. takes every step possible to remove the inherent error when performing balloon studies for our clients. From checking weather and wind speeds online at 4:00am on the scheduled day to flying several large balloons at known elevations and leaving an associate on site to record data throughout the test, we continuously work to remove the inaccuracies.