MicaSense RedEdge-MX Kurzanleitung zur Einrichtung

MicaSense RedEdge-MX™ and DLS 2

Integration Guide

Revision 04

November 2020

Seattle, WA

November 2020

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Table of Contents

Table of Contents 1

Introduction 2

Firmware 2

What’s Included? 2

Lens and Imager Information 3

Center wavelengths and bandwidth 3

Cameras with serial number RX02 or higher 3

Cameras with serial number RX01 4

Imager/band number and output 4

Measurements and Attachment Points 5

Recommendations for Installation 8

Conﬁguration Options 9

Default + Overlap mode 9

Default + trigger by HTTP API 10

MAVLink with PixHawk or similar ﬂight controller 11

DLS 2 with Aircraft GPS 11

HTTP Connection 12

Serial Connection 12

Input and Output 12

External Power and External Trigger (“PWR/TRG”) 13

Serial and Ethernet Data (“COMM”) 15

Power supply speciﬁcations 16

USB port 16

Capture Rate 16

Automatic Capture/Triggering 17

Overlap (recommended) 17

Timer 17

External Triggering 18

External Trigger 18

HTTP API (Ethernet and Wi-Fi) 18

Serial API 18

Disabled 19

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Downwelling Light Sensor 2 (DLS 2) 19

Measurements and Attachment Points 20

DLS 2 Connectors and Buttons 20

DLS 2 Installation Guidelines 22

Fixed-wing 22

Multirotor 22

Example Integration 23

Introduction

MicaSense RedEdge-MX provides multiple options for integration - from stand-alone (where

you only provide power to the sensor) to fully customized integrations. Advanced integrations

take advantage of ﬂexible interfaces including Ethernet, serial, and PWM/GPIO trigger, for

seamless integration with any aircraft.

Firmware

It is important to have the latest version of ﬁrmware installed on your sensor. Please see the

following page to get the latest version and learn how to update your ﬁrmware:

https://www.micasense.com/ﬁrmware-updates

What’s Included?

For the most current list of what's included, see our RedEdge-MX packing list article

Lens and Imager Information

Multispectral

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Pixel size

3.75 μm

Resolution

1280 x 960

(1.2 MP x 5 imagers)

Aspect ratio

4 : 3

Sensor size

4.8 mm x 3.6 mm

Focal length

5.4 mm

Field of view

47.2 degrees horizontal, 35.4 degrees

vertical

Output bit depth

12-bit

GSD @ 120 m (~400 ft)

8 cm/pixel per band

GSD @ 60 m (~200 ft)

4 cm/pixel per band

Center wavelengths and bandwidth

Cameras with serial number RX02 or higher

Name

Center

Bandwidth

Blue

475 nm

32 nm

Green

560 nm

27 nm

Red

668 nm

16 nm

Red edge

717 nm

12 nm

Near infrared

842 nm

57 nm

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Cameras with serial number RX01

Name

Center

Bandwidth

Blue

475 nm

20 nm

Green

560 nm

20 nm

Red

668 nm

10 nm

Red edge

717 nm

10 nm

Near infrared

840 nm

40 nm

Imager/band number and output

Blue

Green

Red

NIR

Red edge

Measurements and Attachment Points

There are four M3 screw holes at 60 mm x 35 mm on-center. The sensor can be attached to

the host aircraft using at least two of the four provided threaded mounting points and M3 x 0.5

screws. If using only two mounting points, it is important to choose two threaded points

opposite of each other.

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Length

83 mm

Width

59 mm

Height

45.4 mm

Mass

231.9 g (Camera + DLS 2)

Recommendations for Installation

The RedEdge-MX should be installed such that it has a clear view of the area directly below the

aircraft. The “cone” of the lenses, which has the widest ﬁeld of view (47.2 degrees horizontal,

35.4 degrees vertical), should be considered in the process of deciding where to mount the

sensor on the aircraft or payload bay.

The multispectral sensors feature a global shutter and can withstand some vibration without

degrading image quality; nevertheless, we recommend vibration isolation between the sensor

mounting platform and the aircraft.

Make sure the sensor points straight down (with respect to the earth) at all times during ﬂight.

The best way to ensure this is to use a gimbal.

Normally, the sensor should be in landscape orientation. If you plan to mount the sensor in a

portrait orientation, remember to swap the vertical and horizontal parameters in your mission

planner.

Ensure that the sensor is completely protected during landing. Note that we do not

recommend using a lens cover during ﬂight as it can ﬁlter the wavelengths that the sensor

measures. Instead, protect the sensor with a recessed installation or by using landing gear.

Use the provided lens cover when storing your camera, and do not set the RedEdge-MX

lens-side-down as it will rest on and scratch the lenses.

More integration guidelines for the DLS 2 are in the DLS 2 section of this guide.

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Conﬁguration Options

There are many ways to conﬁgure the RedEdge-MX. The following summaries will help you

choose the one that meets your needs. Many other options are possible. If you have any

questions about your integration, please contact [email protected]

Default + Overlap mode

The default conﬁguration uses the DLS 2’s integrated GPS. Use the provided cable to connect

the DLS 2 to the camera. Ensure the DLS 2’s physical installation meets the requirements

outlined later in the DLS 2 section of this guide. Connect a compatible power supply to the

camera’s power pins. For more details about power, see the Input and Output section of this

guide.

Once attached to the aircraft, use the Flight Calculator to determine the necessary overlap

percentage for your desired Ground Sample Distance and Target Altitude, then input the

parameters into the Overlap settings, outlined in the Triggering section in this guide. The

sensor will begin capturing once it is within the Target Altitude Tolerance of your Target

Altitude. It will capture often enough to maintain your overlap percentage at your desired

altitude. This will ensure enough coverage to create a mosaic of your ﬂight area with your

preferred photogrammetry software.

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Default + trigger by HTTP API

With this conﬁguration, instead of automatically capturing with an automatic triggering mode,

the HTTP API (see below) is used with an onboard computer to trigger the camera at intervals

determined by your computer. See examples of the HTTP API here: Integration examples for

MicaSense sensors.

MAVLink with PixHawk or similar ﬂight controller

The RedEdge-MX can be triggered with a PixHawk ﬂight control system using the serial API.

MicaSense cameras currently use the MAVLink v1.0 messaging protocol for the serial API,

which the camera uses to interact with PixHawk. You can read more detailed information here:

Guide for MicaSense Sensors and PixHawk.

DLS 2 with Aircraft GPS

For more control, advanced users can communicate with RedEdge-MX by HTTP (Ethernet,

Wi-Fi) or serial (MAVLink) using the MicaSense APIs (Application Programming Interfaces). The

APIs can be used in lieu of the DLS 2 GPS to provide the sensor with a position and attitude

data (from the aircraft GPS, for example). Anytime GPS data is sent to the sensor via the API

commands, it will be written to the image metadata, overriding the DLS 2 internal GPS data for

ﬁve seconds (or until another update is sent via the API).

Andere Handbücher für RedEdge-MX

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