NRG USER MANUAL
SymphoniePLUS3 User Guide
SymphoniePLUS3_DataLogger_Manual
Rev. 17
support@nrgsystems.com | Page 157
31 December 2018
TEXT FILE
A computer file containing only text in ASCll format.
TIME STAMP
The time and date that identifies when a record was recorded. All
SymphoniePLUS3 logger data files are time stamped with the
beginning time of the interval.
TURBULENCE INTENSITY
(TI)
A measure of the irregularity of air flow over a site. TI is related to
wind speed and terrain and is defined as the ratio of the standard
deviation of the wind speed to the mean of the wind speed.
Average turbulence intensity is the arithmetic mean of the valid TI
values for the reporting period.
UTC
Coordinated Universal Time (UTC) is the international time
standard. It is the current term for what was commonly referred
to as Greenwich Meridian Time (GMT). Zero (0) hours UTC is
midnight in Greenwich, England, which lies on the zero
longitudinal meridian. Universal time is based on a 24 hour clock.
Afternoon hours such as 5 pm UTC are expressed as 17:00 UTC
(seventeen hours, zero minutes).
WIND DIRECTION
The compass direction, as compass points (NE, NNE, etc.) or
degrees (0 to 360°) from which the wind is blowing.
WIND SHEAR
The stress that occurs when adjacent wind layers move at
different speeds or in different directions. Wind shear is measured
as the change in wind speed from a measured anemometer to a
reference anemometer. The measured anemometer is normally
the anemometer at the top of the tower. The reference
anemometer is the lowest anemometer on the tower.