Weather Data

Aerotec uses two methods to verify the vertical accuracy of its LIDAR collection operations.

  • First, Aerotec collects LIDAR data over the immediate vicinity of its ground control station (GPS) both before and after the concurrent data collection operation - to ensure vertical accuracy throughout the entire data capture operation
  • Second, Aerotec collects independent (vertical accuracy) ground survey data along and within the corridor/area of interest.  These data points are statistically analyzed according to FGDC Standard:  FGDC-STD-007.3-1998 (Geospatial Positioning Accuracy Standards Part 3:  National Standard for Spatial Data Accuracy)

Aerotec collects weather data (if applicable) simultaneously with the airborne LIDAR data collection operations to account for the sag present in electrical conductors in the area of interest.  The weather data (time dependent) consists of:

  • Instrument location
  • Time of observation
  • Local ambient temperature (F / C degrees)
  • Sun conditions (clear, overcast, solar energy)
  • Wind speed (mph)
  • Wind direction (compass angle - degrees)

Horizontal Ground Control

Quality Assurance

Aerotec uses NGS monuments (where possible) to provide horizontal control for its airborne LIDAR / FODAR / Imagery data capture operations.  The GPS units occupying these monuments record continuously during the airborne data capture operations.  Subsequently, the ground GPS data is post-processed against the GPS data collected in the aircraft to produce the most accurate (horizontal and vertical) positioning results possible.

Vertical Accuracy