HD51.3D…
- 34 -
V2.0
The previous string is followed by a second string ($IIXDR…) including the solar radiation,
compass and tilt angles measurements:
$IIXDR,G,x.x,,PYRA,G,x.x,,TILTX,G,x.x,,TILTY*hh<CR><LF>
E
XAMPLE
Suppose that there are the following environmental conditions:
o
Wind speed = 5.60 m/s (=10.88 knot)
o
Wind direction with respect to magnetic North = 38.7°
o
Barometric pressure = 1014.9 hPa (= 30.0 inHg)
o
Relative humidity = 64.2 %
o
Air temperature = 26.8
°C
o
Solar radiation = 846 W/m
2
Based on the above values, the following can be calculated:
o
Absolute humidity = 16.4 g/m
3
o
Dew Point = 19.5
°C
The strings sent by the instrument in three different cases are indicated below:
•
Case 1 – instrument measuring only wind speed and direction:
$IIMDA,,I,,B,,C,,C,,,,C,,T,38.7,M,10.88,N,5.60,M*3A<CR><LF>
•
Case 2 - instrument measuring wind speed and direction, temperature, relative humidity and
barometric pressure:
$IIMDA,30.0,I,1.0149,B,26.8,C,,C,64.2,16.4,19.5,C,,T,38.7,M,10.88,N,5.60,M*36<CR><LF>
•
Case 3 - instrument measuring wind speed and direction, solar radiation, temperature, rela-
tive humidity and barometric pressure, with compass and tilt angles measurement:
$IIMDA,30.0,I,1.0149,B,26.8,C,,C,64.2,16.4,19.5,C,,T,38.7,M,10.88,N,5.60,M*36<CR><LF>
alternated to:
$IIXDR,G,846,,PYRA,G,1.15,,TILTX,G,0.80,,TILTY*25<CR><LF>
For additional information regarding the protocol, visit the site "www.nmea.org".
Solar radiation
Tilt_X
Tilt_Y
Summary of Contents for DeltaOHM HD51.3D Series
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