Campbell CSIOPC Especificaciones Pagina 210

  • Descarga
  • Añadir a mis manuales
  • Imprimir
  • Pagina
    / 322
  • Tabla de contenidos
  • SOLUCIÓN DE PROBLEMAS
  • MARCADORES
  • Valorado. / 5. Basado en revisión del cliente
Vista de pagina 209
Section 11. Programming Resource Library
11-30
or, in the case of orthogonal sensors
Ux=(Σ(Ue
i
/U
i
))/N
Uy=(Σ(Un
i
/U
i
))/N
where U
i
=(Ue
i
2
+Un
i
2
)
1/2
Standard deviation of wind direction, σ(Θ1), using Yamartino algorithm:
σ(Θ1)=arc sin(ε)[1+0.1547 ε
3
]
where,
ε=[1-((Ux)
2
+(Uy)
2
)]
1/2
and Ux and Uy are as defined above.
Resultant mean horizontal wind speed,
U
:
U
=(Ue
2
+Un
2
)
1/2
FIGURE 11.5-2. Mean Wind Vector
where for polar sensors:
Ue=(ΣS
i
Sin Θ
i
)/N
Un=(ΣS
i
Cos Θ
i
)/N
or, in the case of orthogonal sensors:
Ue=(ΣUe
i
)/N
Un=(ΣUn
i
)/N
Resultant mean wind direction, Θu:
Θu=Arctan (Ue/Un)
Standard deviation of wind direction, σ(Θu), using Campbell Scientific
algorithm:
σ(Θu)=81(1-
U
/S)
1/2
U
Un
Ue
Vista de pagina 209
1 2 ... 205 206 207 208 209 210 211 212 213 214 215 ... 321 322

Comentarios a estos manuales

Sin comentarios