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ABOUT SCALE HIVES HONEYBEES SITE DATA NEWS LINKS
White Hall, MD
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County:  Harford State: MD
Active Since: 2009 Observer: Gruver
Lat/Long: 39.6, -76.5 Landsat WRS Path/Row: 15/33
MODIS TIle V/H: 5/12 MODIS Line, Samp: 39.54, 130.59

Site/Hive Description:

Hive is located 50 yards east of house, against south facing tree line. The area has woods, fields both in cultivation and fallow, rolling hills. Since 1990 many plants and trees planted specifically for bee forage.

Hive and Scale :
2 Deep, 1 super, with a 1 yr old Russian queen.
Detecto scale - platform 17x22”, 500 lb. capacity. Calibrated in March 2009 by Wayne Esaias.

Forage:
Feb-Mar Skunk cabbage, Willow, Maple, Dandelion, ornamentals. April Mustard, Redbud, fruit trees and bushes, dogwood. May Bush Honeysuckle, Dutch Clover, Tulip Poplar, Black Locust, Hollies, Motherwort, Berries. June Privet, Poison Ivy, Canadian Thistle, Japanese Honeysuckle. July Milkweed, Golden Rain Tree, Mountain Mint. August Sumac, Beebee Tree, Fall Red Raspberry, Sunflower. Sep-Oct Goldenrod, Asters.


Nectar Flow Data 2009

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).

 

NDVI

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.

EVI

 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.
where,
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 [http://www.daac.ornl.gov/MODIS/modis.html] from ORNL DAAC, Oak Ridge, Tennessee, U.S.A..


 
 
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Last Updated: February 1, 2024