How to use the Sentera Calibrated Reflectance Panel

6X calibration:

Instructions for using the Sentera Calibrated Reflectance Panel with 6x series sensor can be found in 6x documentation links below.

Push Button | Sentera 6X Series Sensors

If you have an (ILS) light sensor with push button

Manual | Sentera 6X Series Sensors

If you have an (ILS) light sensor without push button

DJI Mavic 3M calibration:

1. Place the Sentera Calibrated Panel on a flat ground surface

2. Power on the drone and the RC controller.

3. Prior to take off on the RC controller go into the DJI Pilot 2 app and then click on the image pane in the lower left hand corner. This is so you can see the images that are being taken when taking the calibration images.

4. Adjust the image zoom by clicking on a square icon on the right-hand side ensure it’s on “1.0x”. Then check camera is set to “AFS” and is on single image capture. If you need to edit this use three tier button next to the camera icon in the top right-hand corner.

DJI Pilot 2 App example of modifying camera settings

1. Rotate the sensor on the drone 90 degrees down with the RC controller (this would be using the wheel in the left front part of the controller so that the camera locks out at 90 degrees).

2. Look at the picture the drone is going to take from the RC controller and make sure the drone is above the calibration panel and then click on the button on the RC controller to take a picture. Take two sets of pictures, one before and one after starting the mission. Make sure you do not get shadows on calibration panel or light sensor at the top of the drone when taking the images.

Light Sensor on M3M

Example of how to hold the drone above Sentera Calibrated Panel

1. Once the images have been completed you can then set the drone down and then close the panel and place it in your car or a good place to where it will not be damaged.

2. Fly your flight plan on the field with DJI Pilot 2.

3. Post flight power down the drone and then take out the microSD card out of the drone located above the battery behind the small cover.

Open up the flap on the back of the drone and press in on the MicroSD Card to eject it

1. Put in the microSD card into your computer and then go to "DCIM" folder where the images are stored on the microSD, they won't be in the mission folder they'll be in a standard folder. Rename the calibration images "CAL_XXX" and then import them into FieldAgent with the photo's you took of the field.

FA will automatically use the image’s that are renamed “CAL_XXXX” and apply them when you order a mosaic, i.e., it will correct the lighting in the pictures that you took when doing a survey of the field.

DJI Phantom 4 Multispectral calibration:

1. Place the Sentera Calibrated Panel on a flat ground surface

2. Power on the drone, RC controller and make sure the iPad is on and connected to the controller via usb cable. In addition, make sure you are in the DJI GS Pro app on the iPad.

3. In the DJI GS Pro app press the "My Missions" button.

DJI GS Pro App

1. Then press on the drone icon on the bottom right hand corner.

DJI GS Pro App

1. Then click on the camera view down on the bottom right to see what the camera is seeing.

DJI GS Pro App

1. Click on the picture settings bellow the picture trigger button and make sure the camera is on auto for the capture.

DJI GS Pro App Camera Settings

1. On the RC controller make sure the sensor is facing 90 degree's straight down by adjusting the gimbal on the scroll wheel on the top left hand side of the controller.

2. Hold the drone above the Sentera Calibrated Panel and in the DJI GS Pro app click on the circle icon on the right hand side in order to take a picture or you can click on the photo button on the RC controller to take a picture. Take one picture before and after starting the mission. Make sure you do not get shadows on calibration panel or light sensor at the top of the drone when taking the images.

Example of DJI P4 Multispectral above Sentera Calibrated Panel

DJI GS Pro App example of camera view that is above the Sentera Calibrated Panel

1. Once you are done taking photo's you can then set the drone down and then close the panel and place it in your car or a good place to where it will not be damaged.

2. Fly programmed mission with FieldAgent or DJI GS Pro.

3. Post flight power down the drone and then take out the microSD card out of the drone located on the left side when battery is facing you.

4. Put in the microSD card into your computer and then go to "DCIM" folder where the images are stored on the microSD card. Rename the calibration images to “CAL_XXXX” and then import them into FieldAgent with the photo's you took of the field.

FA will automatically use the image’s that are renamed “CAL_XXXX” and apply them when you order a mosaic, i.e., it will correct the lighting in the pictures that you took when doing a survey of the field.