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ABOUT SCALE HIVES HONEYBEES SITE DATA NEWS LINKS
Ogden, UT
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County:  Weber State: UT
Active Since: 2012 Observer: Klar
Lat/Long: 41.2, -111.9 Landsat WRS Path/Row: 0/0
MODIS TIle V/H: 0/0 MODIS Line, Samp: 0.00, 0.00

Site/Hive Description:

In a backyard setting, on the edge of developed Ogden. Hives face East, screened to the South and West, and are in sunlight from 0800-1400 hrs. Water is nearby. Landscape is scrub oak, rock scree, and grasslands rising to 9000’ within 4 miles.

Colony:
two second year Italian queens, on screened bottoms, 2 Deeps and 2 Supers.

Scale:
Hand lever scale based on Hanging Scale Model AMW-TL440#. 0.5 lb increments to 440 pounds (200kg). Calibrated against hanging weight True weight=7.55+1.68*LeverWeight SD=1.2 lb.

Forage:
Ornamentals, dandelion, alfalfa, white clover, goldenrod. Main flow is in May-June, Secondary flow in Sept., both weather dependent.

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).

 

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