Data Acquisition & Navigation System


The Integrated AirNAV Airborne Data Acquisition and Navigation System survey management program automatically manages all of the tasks normally carried out by an operator. AirNAV communicates with the pilot / operator via a centralized touch screen display in the cockpit. The fully integrated AirNAV system provides a pilot or operator with a single, graphical, touch screen interface to manage and monitor the health of the geophysical survey processes. Features AirNAV, the next generation of integrated data acquisition and navigation systems, features the QNX, real-time operating system. QNX is optimized for applications that require ultra-fast response to external events. In contrast to DOS, QNX offers far superior memory management, disk access, networking support, and CPU control. Running under QNX, the AirNAV survey management application provides real time control over the following geophysical and navigational processes.
  • monitor health and digitally record all data from magnetometer, gamma-ray spectrometer, HEM, ancillary instrument and navigation modules
  • provide a real time, 3D navigation display and monitor health of the GPS satellite constellation in view.
  • selection of user defined survey areas or grids and monitor survey progress from flight to flight
Navigation Display
  • The AirNAV Navigation Display module is designed to utilize the outputs of GPS navigation systems, for special navigation tasks, such as waypoint navigation and survey grid navigation.
  • The AirNAV Navigation Display module processes the signals received from the GPS navigation receiver, to provide the navigator/pilot with all the information needed to fly survey grids.
  • Other data that the navigator/pilot may be interested in is displayed above the navigation window. Current position, speed, heading, distance to next waypoint, and the number of the line currently being flown are among the values shown.

The AirNAV touch screen graphic display provides the pilot with real time steering and altitude information in traditional, familiar formats.

Data Acquisition Subsystem

The purpose of a Data Acquisition System is to accept all of the data outputs from the various geophysical, navigation and ancillary sensors of an airborne survey system, and record these data digitally. The sensors used with the AirNAV Data Acquisition Module include magnetometers, gamma-ray spectrometers and electromagnetic sensors. Other instruments such as navigation/positioning systems, altimeters, video or camera flight path recovery systems are also readily interfaced or integrated. Digital data is recorded on AirNAV’s shock resistant internal hard disk. Data being recorded may be monitored on AirNAV’s simulated chart recorder display on the LCD Flat Panel. On completion of one or more survey flights, the survey data stored on AirNAV’s hard disk is transferred to the built-in 2 Gb removable media (Jaz disk), which may be read by a suitably equipped field workstation computer, and processed in to maps. AirNAV is supplied with ISA expansion slots, into which may be installed various processor modules, including:
  • 0.001 nT / 10 Hz GSMC-01 magnetometer/gradiometer signal processor modules, accepting Larmor inputs from up to 4 sensors
  • 12 channel GPS-GLONASS remote GPS receiver modules

AirNAV Navigation Setup Utility

ANgnd is a Windows application supplied with the AirNAV navigation system for creating waypoint and grid navigation flight plans.

PPDC Post Processing Utility

The PPDC application for DOS is supplied with AirNAV for Post Processing raw data files and differentially corrected GPS data files, into fixed format ASCII or Oasis database format.

AirNAV Benefits
  • AirNAV enables the geophysical technician to rapidly monitor and evaluate the airborne geophysical and ancillary device status on the ground, prior to the survey flight.
  • Once the health of the geophysical and ancillary devices is confirmed by the geophysical technician, pilot only operation of AirNAV is possible and the pilot may select a survey area on the touch screen, and begin data collection.
  • An on-board operator or navigator is not required under most survey conditions and the weight saving can be converted to added range and productivity.
  • Also, the acquisition of spare parts is greatly simplified as AirNAV is designed to utilize readily available IBM-PC compatible components.
GSMC-01 Magnetometer Signal Processor Plug-in Module
Installed in the AirNAV Data Acquisition and Navigation System, the GSMC-01 Magnetometer Signal Processor Module is a high performance magnetometer counter that provides user programmable sampling up to 100 Hz. The unit features automatic time synchronisation to a GPS 1PPS signal, and RS-232 GPS string, to within one microsecond. This allows very accurate timing of magnetometer sampling.

Airborne Navigation Subsystem, including:
  • AirNAV 2.0 Real Time Navigation Program module
  • 12 channel GPS-GLONASS remote GPS receiver OEM card (installed in AirNAV chassis) with Aircraft Antenna

  • ruggedized, small footprint or 19" rack-mountable PC compatible Pentium computer with 20 - 36 VDC power supply, redundant fans, and shock mounted peripherals.
  • 200 MHz Pentium Motherboard with 32 Mb RAM, floppy and 2.5 Gb shock resistant IDE hard disk drive, dual RS-232 and Centronics input ports
  • PCI video, SCSI, IDE, and Ethernet adapters.
  • 2 GB Iomega Jaz drive (removable media)
  • Ultra High Brite colour touchscreen LCD
  • 16-channel 12-bit A/D ISA module for ancillary devices and EM system data acquisition
  • Data Acquisition Program module, including:
  • AADCII magnetic compensator software driver
  • GR-820 gamma ray spectrometer software driver
  • QNX Operating System license
  • operations manuals

AirNAV System at work near Galena, Alaska

Ordering Information
Description             Order Number
AirNAV System 350-495-0001