Validating Satellite Data and Images
 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
The SR-3500 and PSR+ 3500 both play a role in validating satellite data and imagery for satellites such as
the Landsat 8. The launch of Landsat 8 as part of NASA’s Landsat Data Continuity Mission (LDCM) will
provide researchers in many remote sensing and mining applications with free access to the latest in
images and data collected in specific areas of the VIS/NIR spectrum.  In fact, this launch is one of more
than forty international satellite launches scheduled for 2013.
SPECTRAL EVOLUTION provides two ways to validate  satellite
calibrating the NIR sensors on a satellite, and the
PSR+ 3500 for
for ongoing calibration.

SR-3500 and PSR+ both use three photodiode array
detectors to cover the following ranges :
  • 512 element Si array – 350-1000nm
  • 256 InGaAs array – 1000-1900nm
  • 256 InGaAs array – 1900-2500nm
The SR-3500 is well-suited to support radiometric calibration
transfer for integrating spheres calibrating satellites to NIST-
traceable standards.

For pre-flight calibration, the SR-3500 delivers the following
  • Spectral resolution 350—2500nm
  • UV/VIS/NIR full range, fast, one-touch scanning
  • Compact, lightweight and reliable with no moving parts
  • Autoexposure, autoscaling, and auto dark current shutter
  • Easy to set up anywhere
  • Long-term stability
  • DARWin SP Data Acquisition software captures spectra in
    ASCII format for use with third party software—no pre-
    processing required

The data from the Landsat sensors is used in research on
climate effects, crops and soil research, geographic studies,
field spectroscopy, ice and snow research, ocean studies,
geological remote sensing, alteration zone mapping, mining
exploration, and more.

Post-launch, satellite imagery requires ground truthing
calibration that can be ideally handled by the PSR+. Lightweight,
compact, and portable, the PSR+ provides the following
  • Full UV/VIS/NIR across a 350-2500nm spectral range
  • Spectral resolution of 3nm from 350-1000nm; 8nm@1500nm;
  • Use for standalone data acquisition or with a laptop or
    Getac personal digital assistant (PDA) with a built-in GPS,
    autofocus digital camera, e-compass, altimeter, recording
    for voice notes, and high visibility/daylight display
 First in Full Range PDA Spectrometer, Spectroradiometer and Spectrophotometer Systems
PSR+ spectroradiometer