VIRIS VIrIS Visible/Infrared Intelligent Spectrometer

White Pine Spectral Curve & Landsat Band Regions TM1 (Blue) TM2 (Green) TM3 (Red) TM4 (NIR) TM5 (MIR) TM7 (MIR) Water Absorption Cellulose Red Edge NIR 3 NIR 1 Leaf Pigments Cell StructureWater Content Lignin

Red Edge Inflection Point (REIP)

Relationship Between Chlorophyll Concentration and REIP Values (Taken From Moss and Rock, 1991)

Chlorophyll Absorption

Spectral Indices

REIP – The Red Edge Inflection Point, a strong indicator of Chlorophyll Content (the higher the number, the greater the amount);

Spectral Indices REIP – The Red Edge Inflection Point, a strong indicator of Chlorophyll Content (the higher the number, the greater the amount); NDVI – The Normalized Difference Vegetation Index, an indicator of Greenness (the higher the number, the greener the foliage);

Spectral Indices REIP – The Red Edge Inflection Point, a strong indicator of Chlorophyll Content (the higher the number, the greater the amount); NDVI – The Normalized Difference Vegetation Index, an indicator of Greenness (the higher the number, the greener the foliage); TM 5/4 Ratio – An indicator of Wetness or Dryness (the higher the number, the drier the foliage);

Spectral Indices REIP – The Red Edge Inflection Point, a strong indicator of Chlorophyll Content (the higher the number, the greater the amount); NDVI – The Normalized Difference Vegetation Index, an indicator of Greenness (the higher the number, the greener the foliage); TM 5/4 Ratio – An indicator of Wetness or Dryness (the higher the number, the drier the foliage); The NIR 3/1 Ratio – An indicator of Seasonal Development (the higher the number, the older the foliage).

Tree #SenescentHealthyUnhealthy REIP NDVI TM NIR

Tree #MapleOak Pine- 1st yr Pine- 2nd yr REIP NDVI TM NIR

Chlorotic Mottle Stomatal Rows