| 06260 De Bilt |
|
| Coordinates: |
Latitude: 52° 06' N. Longitude 05° 11' E. |
| Elevation: |
+2 m. ASL. |
| Measurements |
19010101 - present. |
| Site characterization:: |
Partly open landscape. Broad transition zone between
the low sandy hills of the “Utrechtse Heuvelrug” and the basin
of the river “Kromme Rijn”. Meadows and arable land alternate
with built-up areas and woodlands. |
| Soil type: |
Sand |
| Height of barometer: |
+3,6 m. relative to mean sea level. |
| Height windspeed measurements: |
20 m. |
Temperature: |
measurements by means of a.... |
| 19010101 - 19500516 |
thermograph housed in a large pagode screen (2.2
m above ground level). |
| 19500517 - 19610628 |
thermograph housed in a Stevenson screen (2.2 m
above ground level) |
| 19610629 - 19930625 |
electrical resistance thermometer housed in a Stevenson
screen (1.5 m above ground level). |
| 19930326 - present |
resistance sensor housed in a round shaped multi-plate
radiation screen (1.5 m above grond level) |
Precipitation: |
measurements by means of a....( 0,40 m above ground
level): |
| 19060101 - 19460111 |
pluviograph with a circular orifice of 4 dm2(1.5
m above ground level). |
| 19460112 - 19810331 |
pluviograph with a circular orifice of 4 dm2. |
| 19810401 - 19930228 |
pluviograph with a circular orifice of 2 dm2. |
| 19930301 - present |
automatic, electronic measurements (circular orifice
2 dm2). |
Air pressure | measurements by means of a....(reduced to mean sea
level): |
| 19020101 - 19731015 |
barograph and mercury barometer. |
| 19731016 - 19930625 |
barograph and digital aneroid barometer. |
| 19930626 - heden |
digital barometer (principle: "Digiquartz Pressure
Transducer"). |
| Wind |
measurements by means of a....and height
measurements. |
| 19040101 - 19150823 |
Molentje van Robinson op houten toren
op hoofdgebouw; windrichting anemograaf "Sass en Co" systeem Steffens.
Meethoogte 37,0 m. |
| 19150901 - 19161031 |
idem; tijdelijke meting op 18,0 m; herleid
naar 37,0 m met de factoren: NO 2.02; W 1.81; NNW 1.55 en ZZO
1.26. Meethoogte 18,0 m. |
| 19161101 - 19530216 |
idem; op betonnen toren op hoofdgebouw;
ter vergelijking ook een Dines aanwezig op de toren. Meethoogte
37,5 m. |
| 19530217 - 19601231 |
idem; op nieuwe toren (de spijker) diverse
molentjes. Meethoogte 38,3 m. |
| 19610101 - 19820731 |
cup anemometer met frequentiemeter en
elektrische windvaan; Nieaf recorder. Meethoogte 10,0 m . |
| 19820801 - 19930524 |
idem; Camille Bauer recorder (er was
een back-up mast van 20,0 m hoog). Meethoogte 10,0 m. |
| 19930525 - 19930625 |
idem; AWS (digitale registratie). Meethoogte
10,0 m. |
| 19930626 - heden |
idem; AWS (digitale registratie). Meethoogte
20,0 m. |
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