15
The data is stored in comma-delimited text files. These
files can be opened with text-editing software (e.g. Micro-
soft Word) or spreadsheet software (e.g. Excel).
The first two lines of the data file give the logger’s name
and serial number. The third line indicates that latitude
and longitude are referenced to the 1984 World Geodetic
Survey datum. The fourth line shows the column head-
ings for the rest of the data file.
Logging sessions are started and completed by turning the
meter on and off. The start of a logging session is indi-
cated by the data line “Logger Started.” If a GPS signal
was found at the start of a logger session, a time stamp is
included on the “Logger Started” line.
The data file is separated into 6 fields: Latitude and Lon-
gitude (blank if a GPS unit was not connected), sample
number, Red reflectance, Near Infrared reflectance, and
NDVI.
Sample data showing results of data collected with and
without GPS activated. Note: GPS signal not found
when recording data in lines 10 through 15.
Data Files
