From the DARWin SP screen, the 19 vegetation indices including NDVI are
accessed via a pull down menu.
Using Vegetation Indices with a
field spectroradiometer
 First in Full Range PDA Spectrometer, Spectroradiometer and Spectrophotometer Systems
1 Canal Street  ◊  Unit B1
Lawrence, MA 01840  USA
Tel: 978 687-1833  ◊  Fax: 978 945-0372

Copyright © 2012 Spectral Evolution, Inc
Vegetation indices are an important tool for the remote sensing
researcher involved with vegetation studies in the field. Since
surfaces, measurements of this reflectance and absorption can
provide data on the targets. Vegetation that is photosynthetically
active absorbs more red light and reflects most of the near infrared
light that shines on it. A vegetation index, like the Normalized
Difference Vegetation Index (NDVI) works as an indicator that
describes the greenness or density and health of vegetation based
on measurement of absorption and reflectance.

NDVI is calculated as the difference between the red and near
infrared bands of a spectral measurement according to the forumula:
NDVI = (NIR-RED)/(NIR+RED). The bigger the difference/higher the
measurement, the healthier/greener the vegetation.

All SPECTRAL EVOLUTION spectroradiometers and spectrometers are
equipped with DARWin SP Data Acquisition software. From the
DARWin menu there are 19 vegetation indices including NDVI
immediately available from a pull down menu. These indices include:

  • GRVI (Green Ratio Vegetation Index)
  • SR (Simple Ratio Vegetation Index)                            
  • DVI (Difference Vegetation Index)
  • SAVI (Soil Adjusted Vegetation Index)                         
  • Red/Green (Red Green Ratio)
  • ARVI (Atmospherically Resistant Vegetation Index)     
  • Green NDVI (Green Normalized Difference Vegetation Index)
  • EVI (Enhanced Vegetation Index)                                
  • MSAVI2 (Modified Soil Adjusted Vegetation Index Type II)
  • IPVI (Infrared Percentage Vegetation Index)                
  • Sum Green (Summed Green Vegetation Index)
  • PRI (Photochemical Reflectance Index)                      
  • NDVI 705 (Red Edge Normalized Vegetation Index)
  • WBI (Water Band Index)                                              
  • NDWI (Normalized Difference Water Index)
  • PAR (Photosynthetically Active Radiation)

Using the indices with our agricultural spectroradiometers and
spectrometers allows you to bring your research and analysis to the
field with reliable, high resolution, and accurate results.  Applications
can include:

  • Vegetation dynamics
  • Plant phenological changes over time
  • Biomass production
  • Non-destructive measurement of canopy greening,
    senescence, and stress
  • Soil moisture
  • Pasture condition and performance
  • Changes in range land
  • Estimating crop yields
  • Land cover classification
  • Carbon influx or sequestration
  • Plant photosynthesis activity
  • Leaf area index (LAI) measurement
 First in Full Range PDA Spectrometer, Spectroradiometer and Spectrophotometer Systems
The PSR+ 3500  is a field portable spectroradiometer for
remote sensing applications including vegetation studies. With
DARWin SP Data Acquisition Software included, it provides
instant access to 19 vegetation indices for your research.
PSR-Series spectroradiometers provide access to 19 vegetation indices
PSR+ field spectroradiometer for vegetation studies