Operating Your SlantRange Sensor

When you're ready to start collecting data with your SlantRange RTK sensor system, here's what you need to know.

    • Minimum 5 minute accumulation time should finish by the time the rest of the equipment is prepped for flight; accuracy will continue to improve the longer the base station is powered on. Do not move the base station after powering on.
  • Inspect aircraft
    • IMPORTANT: verify the GPS mast thumbscrews are tightened into the top of the aircraft legs. If they come loose and fold down in flight, they will contact the propellers. Verify SlantRange sensor window is clear from debris and loose cables are tied down.
  • Monitor wind and cloud cover, modify flight direction and speed if needed.
  • Power on hand controller and aircraft
    • As a reminder, do not shade the AIS when pushing the button.
  • Wait for solid three lights on AIS indicating RTK fix
    • Note: If AIS lights are green and blinking yellow, the SlantRange sensor needs additional accelerometer data for its calibration. Pick up the aircraft and rotate, all three AIS lights will begin blinking after a few seconds.
  • Begin data capture by pressing the button on AIS, a solid yellow light will appear for a few seconds indicating camera initialization; wait for blinking green light indicating data capture
  • Begin mission through flight planner

About Light Codes

As you’re preparing to operate the sensor, you may notice different light codes on the AIS. Here are some of the most common codes you’ll encounter:

Light Code


Blinking red, blinking yellow, blinking green

Sensor is waiting for RTCM messages from base station

Solid red, blinking yellow, blinking green

Sensor is communicating with RTK base station


Solid red, solid yellow, blinking green

Sensor is in RTK float status

Solid red, solid yellow, blinking green

Sensor has reached RTK fix, ready to begin data collection