Decagon Devices SRS User Manual

SRS
Spectral Reflectance Sensor
Operator’s Manual
Decagon Devices, Inc.
Version: January 15, 2014 — 12:16:45

Decagon Devices SRS Specifications

General

Brand	Decagon Devices
Model	SRS
Category	Accessories
Language	English

Summary

About SRS

Overview

Specifications

Technical specifications of the SRS sensor, including wavebands, dimensions, power, and connectivity.

Theory

Normalized Difference Vegetation Index (NDVI)

Explanation of NDVI measurement principles, calculation, and its application in vegetation monitoring.

Fractional Interception of Photosynthetically Active Radiation

Photochemical Reflectance Index (PRI)

Details the PRI index, its calculation, and its correlation with plant physiological variables.

Calculating Percent Reflectance from Paired Up and Down Looking Sensors

Methods for calculating reflectance and vegetation indices using paired or single sensors.

Connecting the SRS

Connecting to Decagon Data Logger

Instructions for connecting the SRS sensor to Decagon's Em50 series data loggers and software.

3.5 mm Stereo Plug Wiring

Connecting to a Non-Decagon Logger

Pigtail End Wiring

Communication

SDI-12 Communication

Overview of the SDI-12 communication protocol, its implementation, and addressing for SRS sensors.

Understanding Data Outputs

Using Decagon's Em50 series data loggers

Installing the SRS

Attaching and Leveling

Instructions for mounting, attaching, and leveling the SRS sensor for optimal measurements.

Cleaning and Maintenance

Troubleshooting

Data Logger

Sensors

Calibration