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Oak Hill, OH
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County:  Jackson State: OH
Active Since: 2009 Observer: Lovett
Lat/Long: 38.9, -82.6 Landsat WRS Path/Row: 19/33
MODIS TIle V/H: 5/11 MODIS Line, Samp: 127.50, 688.90

Site/Hive Description:

The scale hive is located on a hillside facing east–southeast. It is exposed but sits under an overhang. Neighboring forage area includes farmland, forests, low lying valleys of swamp land, clear cuts, reclaimed mine land, and a 100 acre lake. The area is sparsely populated rural in the rolling foothills of the Appalachians.

Fairbanks, 500 lb capacity, 0.25 lb increments, leveled on concrete base, exposed to weather, under a shed roof.

2 deeps Langstroth hive, 2 year old queen from a September 2008 feral swarm.

April-May: dandelion, red bud, black locust, tulip poplar, mustard, apple tree, alfalfa, wild cherry, brambles, multi-flora rose; June-July: soybean, clover, vetch, ironweed, Aug-Sept: milkweed, black haw, golden rod, blue aster.

Nectar Flow Data 2009

Download Data File (comma delimited), download QA flag key


Nectar Flow Data 2010

Download Data File (comma delimited), download QA flag key


Nectar Flow Data 2011

Download Data File (comma delimited), download QA flag key


Nectar Flow Data 2012

Download Data File (comma delimited), download QA flag key



MODIS Subset Data (from the ORNL DAAC)
Red dots are the average of all pixels with acceptable quality (see landcover extract below for area covered).
Blue dots are the center pixel only (point is not plotted if the pixel is of unacceptable quality).






The Normalized Difference Vegetation Index (NDVI) is the ratio of the  difference between visible (red) and infra-red (IR) wavebands to the sum of these bands. 

NDVI = nir - red / nir + red

 NDVI provides an indication of the amount and vigor of vegetated  surfaces. 

 NDVI has been widely used with multiple generations of satellite data.


 The Enhnaced Vegetation Index (EVI) is a more complicated combination of wavebands compared to the more widely used index, NDVI.  The advantage of this newer index is improved sensitivity in high biomass regions and reduction in atmospheric influences.
pNIR = NIR reflectance
pRed = red reflectance
pBlue = blue reflectance
C1 = atmosphere resistance red correction coefficient
C2 = atmosphere resistance blue correction coefficient
L = canopy background brightness
G = gain factor

The MODIS sensor on the Terra satellite platform provides us with 16-day composite measures of NDVI/EVI throughout the year.  NASA distributes MODIS data from many of their distributed data centers.

MODIS Land Cover

MODIS Data Subset Citation:
Oak Ridge National Laboratory Distributed Active Archive Center (ORNL DAAC). 2007. MODIS subsetted land products, Collection 4. Available on-line [] from ORNL DAAC, Oak Ridge, Tennessee, U.S.A..

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NASA Official: Sadashiva Devadiga
Last Updated: February 1, 2024