Vegetation Studies
 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
For vegetation studies, SPECTRAL EVOLUTION offers a wide range of instruments:
  • PSR+ 3500 - full range UV/VIS/NIR spectroradiometer with a spectral range from 350-2500nm
  • PSR-2500 - full range UV/VIS/NIR spectroradiometer with a spectral range from 350-2500nm
  • PSR-1100f - our smallest, full-featured field portable spectroradiometer with a 320-1100nm
  • UDS-1100/UDS-1100SA for accurate upwelling/downwelling measurement in the field with a
    320-1100nm spectral range
One of the major applications for remote sensing technology is
vegetation studies. Remote sensing using a field
  • Management of land and water resources
  • Disaster assessment
  • Yield production
  • Canopy studies
  • Crop yield forecasting
  • Vegetation identification
  • Crop condition assessment

The cells in plant leaves effectively scatter light because of the
high contrast in the index of refraction between water-rich cell
contents and inter-cellular air spaces. Plants that are engaged in
photosynthesis use blue and red light as energy sources. They
reflect little light back from these wavelengths. The underlying
principle for using NIR is that plants with different nutrient levels
reflect light differently in specific wavelengths.

Many researchers are using a portable agricultural
spectroradiometer such as the
PSR+ to study vegetation in situ
and confirm, modify, and better understand hyperspectral
remote sensing data from satellites such as Landsat 8, or plane

Because it is fast and non-destructive, remote sensing is a
popular technology for reliably measuring biophysical and
biochemical vegetation variables. By capturing and analyzing
data such as leaf area index (LAI) and canopy chlorophyll
content, vegetation can be modeled and compared to vegetation
indices to reveal health, stress, infestation, pollution, climate
changes, drought, fertilization, and a range of other conditions.

All SPECTRAL EVOLUTION portable spectroradiometers and
spectrometers include
DARWin SP Data Acquisition software with
pull-down menu access to the USGS spectral library for
vegetation and nineteen
vegetation indices. These include NDVI
(Normalized Difference Vegetation Index), SR (Simple Ratio), SAVI
(Soil Adjusted Vegetation Index), ARVI (Atmospherically Resistant
Vegetation  Index), and more.

In addition, our
EZ-ID sample identification software with Custom
Library Builder module allows you to match target scans against
a known sample in a
commercial library
or you can build your
own custom spectral
Spectral Evolution
Handheld Portable
Spectrometers can be
ordered with the full
featured Getac PS336
ruggedized PDA. The
Getac includes an
auto-focus digital
camera, e-compass,
altimeter, voice note
capability, GPS tagging,
and sunlight readable
VGA display.

More info on the PS336  
from Getac
Vegetation Indices
Sum Green, NDVI705, NDWI, NDNI, and CCI.  
 First in Full Range PDA Spectrometer, Spectroradiometer and Spectrophotometer Systems
Spectral Evolution's lightweight battery operated portable spectroradiometers can be outfitted with
FOV lenses or fiber optics. Units can be handheld, tripod mounted or carried with a shoulder strap or
backpack for easy use in the field. Our leaf clip is specifically designed for leaf  reflectance
measurements. It includes a built-in white plate, small spot, and low power illumination. It allows you
to measure a small leaf area without damaging the sample and is used for:
  • Estimation of crop and grass chlorophyll
  • Maize and soybean studies
  • Photosynthesis study in corn and soybean crops
  • Measurement of single pine needles and small leaves without including the mid-rib
  • Water stress and relative water content in maize
  • Leaf chlorophyll content in grasses
  • Physiological condition of crops
  • Leaf chlorophyll and nitrogen content
  • Leaf pigment content in forest canopies
  • Measurement of vegetation for plant biochemicals
  • Analysis of seed nutrient properties for corn, wheat , rice, soybeans, etc.
UDS-1100 and
standalone unit
EZ-ID for vegetation studies
PSR+ 3500 field spectroradiometer for vegetation research