ZephIR user manual QP1009-582 v2
© Natural Power 2008
10
th
June 2008
Page 33
Averaged Wind Data Packets
When wind data packets are averaged in the ZephIR it is done on a field by field basis. Each field in an averaged packet is
either obtained by averaging across all packets, or by taking only the value from the first or last packet in the set. This table
describes how each field is processed:
CONTENT
AVERAGE TYPE
REFERENCE
From last packet. This means that any future data requests from this
reference will not include duplicate data.
TIME AND DATE
1
From first packet, but aligned with packet averaging boundary.
For example, a ten minute averaged packet would start 1:10:00
(h:mm:ss) even if the first packet in the set came from 1:10:03
NUMBER OF POINTS IN FIT
AVERAGE
NUMBER OF PACKETS IN AVERAGE
-
HORIZONTAL WIND VELOCITY
AVERAGE
VERTICAL WIND VELOCITY
AVERAGE
TURBULENCE PARAMETER
AVERAGE
WIND DIRECTION
VECTOR AVERAGE
ORIENTATION
From first packet
WIND VANE READING
From first packet
HEIGHT
-
STATUS FLAGS (see below)
From first packet
MET STATION DATA
From first packet
GPS DATA (if available)
From first packet
BATTERY LEVEL
From first packet
GENERATOR FUEL LEVEL
(becomes a variance in an averaged packet)
-
MIN HORIZONTAL WIND VELOCITY
2
-
MAX HORIZONTAL WIND VELOCITY
3
-
POD TEMPERATURES
From first packet
CLOUD SCALING
AVERAGE
SCALING
AVERAGE
MET WIND SPEED
From first packet
