• DAQNAV Overview
  • Modules and Configurations
DAQNAV
 

Scott Hogg & Associates now offers the DAQNAV system. A new system designed for airborne geophysics combining data acquisition, navigation and real-time magnetic compensation into one unit.

 

Some key features of the system include:

  + Real-Time Aeromagnetic Compensation.
  + Log data and check instrument diagnostics in real-time.
  + Create and load Custom Flight Plans.
  + Create and load a Base Map Image of your choice.
  + Navigate in 2D with Cross-Track bar.
  + Navigate in 3D with display of current altitude relative to Drape Surface Profile and DTM.
  + Automatic Progressive Map Rotation on Flight Line approach.
  + Preset scale preferences plus Push Button Zoom in all modes.
 

Data Acquisition

The Airborne DAQNAV system records digital data received on USB (serial ports). Many devices such as GPS instruments, magnetometers and spectrometers provide digital output in this format. Other devices such as fluxgate magnetometers, altimeters and VLF often provide a simple output voltage that is first converted to digital using supplementary A/D converters. The DAQNAV system provides the user with a Diagnostic Window to monitor these various inputs. The operator can toggle between the Diagnostic and Map windows without affecting the surrounding Navigation information.

Real-Time Aeromagnetic Compensation

Aeromagnetic compensation of multiple magnetometers can be carried out in both real-time or post-flight using the same algorithms. The methodology is based on the proven 18 term Leliak model with some added terms for magnetic gradient applications. In the air the operator flies a Calibration Box and the system provides the results with automatic graphic charts to confirm the quality of the solution. The solution is stored together with the associated graphic results to be called up for real time application. Compensation solutions derived in the air or on the ground are interchangeable.

Flight Replay

The data recorded on any flight can be used as system input for training purposes. Choose a data file from any project and re-experience the flight in your office. This is not a simple video; the full system interface with its functionality is active.

DAQ2xyz

The DAQ2xyz software program reformats the collected airborne data into a GPS time aligned “xyz” file. This ASCII file format is compatible with all geophysical processing software. The program may be run on the airborne system or an office PC.

Hardware

The system consists of a 3.5 inch (11 cm) rack-mountable high performance, single board PC computer. A Solid State Disk Drive provides reliable high speed performance in an airborne environment and a removable SD card facilitates unloading the collected data. Power may be either 28 Volt DC or 115/230 Volt AC. The GUI or graphical user interface is normally a high-brightness touch-screen LCD display. Any GUI of any type and size that is Linux compatible may be used. Serial data input is via USB ports. The system tags the port number to the input data to enable distinction between multiple devices with the same record type. The system is designed to recognize NMEA record types such as those produced by GPS devices as well as some Magnetometers and A/D converters like KroumVS instruments KMAG4 and KANA8 devices that provide synchronization with GPS time. Simple serial inputs, such as those from a Gem GSM-19 proton magnetometer, can also be accommodated.

DAQNAV brochure.pdf
 

Below is an illustration of a sample DAQNAV configuration. Different DAQNAV modules have different hardware requirements and provide different sets of features.

 
DAQNAV Comparison