Data element numbers

The type of measurements in the data files are identified using four-digit codes called element numbers.

A few commonly used element numbers are:

1000: GHI - global horizontal irradiance

2010: DNI - direct normal irradiance

3000: DHI - diffuse horizontal irradiance

9300: Air Temperature

Generally, the fourth digit is used to separate identical types of measurements made with distinct instruments. For example, "1000" and "1002" are both GHI measurements made with two different instruments. Typically the primary sensor is given the zero designation (1000 in the example above)

The following three tables list the established meaning for each of the element numbers we have used:

Solar radiation data First three digits indicate data type Fourth digit differentiates duplicate types
1st	2nd	3rd
0 — Voltage output of solar cell array (millivolts) [Note: Newer files use '6XXX' instead of '0XXX'.]
	1 — Tilted 15 degrees
		6 — South-facing
	2 — Tilted 25 degrees
		4 — West-facing
		6 — South-facing
		8 — East-facing
	3 — Tilted 30 degrees
		6 — South-facing
	5 — Tilted 45 degrees
		6 — South-facing
	6 — Tilted 60 degrees
		6 — South-facing
1 — Global and total solar radiation (watt hours per square meter per hour)
	0 — Horizontal
		0 — Horizontal
		9 — Ground-facing
	1 — Tilted 15 degrees
		6 — South-facing
	2 — Tilted 25 degrees
		4 — West-facing
		5 — Southwest-facing
		6 — South-facing
		8 — East-facing
	3 — Tilted 30 degrees
		6 — South-facing
	4 — Tilted 35 degrees
		6 — South-facing
	5 — Tilted 45 degrees
		6 — South-facing
	6 — Tilted 60 degrees
		6 — South-facing
	9 — Tilted 90 degrees
		2 — North-facing
		6 — South-facing
2 — Direct solar radiation (watt hours per square meter per hour)
	0 — Beam
		1 — Normal incident
3 — Diffuse solar radiation (watt hours per square meter per hour)
	0 — Horizontal
		0 — Horizontal
4 — Current output of solar cell array (milliampere hours per hour) [For code '4006', see explanation at bottom of page.]
	1 — Tilted 15 degrees
		6 — South-facing
	2 — Tilted 25 degrees
		4 — West-facing
		6 — South-facing
		8 — East-facing
	3 — Tilted 30 degrees
		6 — South-facing
	5 — Tilted 45 degrees
		6 — South-facing
	6 — Tilted 60 degrees
		6 — South-facing
5 — Power output of solar cell array (watts) [For code '5006', see explanation at bottom of page.]
	1 — Tilted 15 degrees
		6 — South-facing
	2 — Tilted 25 degrees
		4 — West-facing
		6 — South-facing
		8 — East-facing
	3 — Tilted 30 degrees
		6 — South-facing
	5 — Tilted 45 degrees
		6 — South-facing
	6 — Tilted 60 degrees
		6 — South-facing
6 — Voltage output of solar cell array (millivolts) [For code '6006', see explanation at bottom of page.]
	1 — Tilted 15 degrees
		6 — South-facing
	2 — Tilted 25 degrees
		4 — West-facing
		6 — South-facing
		8 — East-facing
	3 — Tilted 30 degrees
		6 — South-facing
	5 — Tilted 45 degrees
		6 — South-facing
	6 — Tilted 60 degrees
		6 — South-facing

Spectral solar radiation data All four digits indicate data type
1st	2nd	3rd	4th
7 — Spectral data (watt hours per square meter per hour, except for illuminance values which are kilolux hours per hour)
	0 — Horizontal
		0 — Horizontal
			0 — OG 570
			1 — RG 630
			2 — RG 695
			3 — UVA
			4 — UVB
			5 — Zenith illuminance
			6 — Diffuse illuminance
			7 — Global illuminance
			8 — Maximum illuminance
			9 — Minimum illuminance
	0 — Beam
		1 — Normal incident
			0 — OG 570
			1 — RG 630
			2 — RG 695
			3 — UVA
			4 — UVB
			7 — Beam illuminance
			8 — Maximum illuminance
			9 — Minimum illuminance

Meteorological data First three digits indicate data type Fourth digit differentiates duplicate types
1st	2nd and 3rd
9 — Meteorological data
	10 — Sky condition
	11 — Ceiling height (meters)
	12 — Visibility (kilometers)
	13 — Weather (10-digit code)
	15 — Total rainfall (inches)
	17 — Barometric pressure (millibars)
	20 — Average wind direction (degrees)
	21 — Average wind speed (meters per second)
	22 — Standard deviation of wind direction
	30 — Ambient temperature (degrees Celsius)
	31 — Dew point temperature (degrees Celsius)
	33 — Relative humidity (percent)
	37 — Solar cell temperature (degrees Celsius)
	38 — Minimum ambient temperature (degrees Celsius)
	39 — Maximum ambient temperature (degrees Celsius)
	37 — Solar cell temperature (degrees Celsius)
	40 — Average barometric pressure (millibars)
	51 — Total sky cover (10ths of sky dome)
	52 — Opaque sky cover (10ths of sky dome)
	53 — Precipitable water (millimeters)
	54 — Aerosol optical depth
	55 — Snow depth (centimeters)
	56 — Albedo
	65 — Days since last snowfall

[Note: The Cannon Beach monitoring station uses the non-standard codes '4006', '5006', and '6006', to represent average battery current, power, and voltage, respectively.]