NL Utrecht 2

near the central point of the Dutch weather stations: Weather: http://www.knmi.nl/klimatologie/daggegevens/index.cgi

Kalibration at GAVO NL_Utrecht_2 52.0753 5.1101 6.0 Wim Schmidt 0 116538.0 0.00418392 3.40829e-09 0.00495388

Calibration March 6-8 2010

   The calibration for NL_Utrecht_2:

       X = c ( b (a exp (n(1+d*T)/a) - 1) + n ) 
       n ... counts (sensor output)
       T ... sensor-temperature in °C
       X ... physical quantity (total radiation in [W/m²] 
             or horizontal illumination [Lux])

   a,b,c,d = 1.16538e+05, 4.18392e-03, 3.40829e-09, 4.95388e-03 [W/m²]
  [a,b,c,d = 1.16538e+05, 4.18392e-03, 3.40829e-07, 4.95388e-03 [Lux] ]

       [Background x0= 28.9 mlx]

Log:

 In [74]: SJD1=(X.JD > mx.DateTime.DateTime(2010,3,6,10,37).jdn) & (X.JD < mx.DateTime.DateTime(2010,3,7,8,00).jdn)
 In [75]: SJD2=(X.JD > mx.DateTime.DateTime(2010,3,7,10,11).jdn) & (X.JD < mx.DateTime.DateTime(2010,3,7,23,59).jdn)
 In [76]: SSH=(X.Sunheight_deg_from_JD(X.JD)>20)|((X.Sunheight_deg_from_JD(X.JD)<0)&(X.Sunheight_deg_from_JD(X.JD)>-12))
 In [77]: SJD=(SJD1|SJD2)&SSH
 In [78]: X.plot_em1c0T(1.19769e+05,9.48089e-03,2.17334e-07,-1.70136e-02,5.43590e-03,marker='o',color='r',JD_select=SJD)
 In [79]: X.fit_em1_to_natLight(Lux_range=[0.0001, 200000], type='em1c0T',JD_select=SJD)
 Fit: a,b,c,x0,d,: 1.16538e+05,4.18392e-03,3.40829e-07,-2.89218e-02,4.95388e-03,res2/(N-n-1) = 0.0556 ,N = 261, n= 5

--GuentherWuchterl 22:59, 18. Aug. 2010 (UTC)

WH --GW (talk) 16:36, 28 April 2016 (CEST)