| Field
Position | Element | Values | Definition |
|---|---|---|---|
| 002 - 009
002 - 003 004 - 005 006 - 007 008 - 009 | Local Standard Time
Year Month Day Hour | 61 - 90 1 - 12 1 - 31 1 - 24 |
Year, 1961-1990 Month Day of month Hour of day in local standard time |
| 010 - 013 | Extraterrestrial Horizontal
Radiation | 0 - 1415 | Amount of solar radiation in Wh/m2
received on a horizontal surface at the top of the atmosphere during the 60 minutes preceding the hour indicated |
| 014 - 017 | Extraterrestrial Direct
Normal Radiation | 0 - 1415 | Amount of solar radiation in Wh/m2
received on a surface normal to the sun at the top of the atmosphere during the 60 minutes preceding the hour indicated |
| 018 - 023
018 - 021 022 023 | Global Horizontal Radiation
Data Value Flag for Data Source Flag for Data Uncertainty |
0 - 1200 A - H, ? 0 - 9 | Total amount of direct and diffuse
solar radiation in Wh/m2 received on a horizontal surface during the 60 minutes preceding the hour indicated |
| 024 - 029
024 - 027 028 029 | Direct Normal Radiation
Data Value Flag for Data Source Flag for Data Uncertainty |
0 - 1100 A - H, ? 0 - 9 | Amount of solar radiation in Wh/m2
received within a 5.7° field of view centered on the sun during the 60 minutes preceding the hour indicated |
| 030 - 035
030 - 033 034 035 | Diffuse Horizontal Radiation
Data Value Flag for Data Source Flag for Data Uncertainty |
0 - 700 A - H, ? 0 - 9 | Amount of solar radiation in Wh/m2
received from the sky (excluding the solar disk) on a horizontal surface during the 60 minutes preceding the hour indicated |
| 036 - 041
036 - 039 040 041 | Global Horiz. Illuminance
Data Value Flag for Data Source Flag for Data Uncertainty |
0 - 1300 I, ? 0 - 9 | Average total amount of direct and
diffuse illuminance in hundreds of lux received on a horizontal surface during the 60 minutes preceding the hour indicated 0 to 1300 = 0 to 130,000 lux |
| 042 - 047
042 - 045 046 047 | Direct Normal Illuminance
Data Value Flag for Data Source Flag for Data Uncertainty |
0 - 1100 I, ? 0 - 9 | Average amount of direct normal
illuminance in hundreds of lux received within a 5.7° field of view centered on the sun during the 60 minutes preceding the hour indicated. 0 to 1100 = 0 to 110,000 lux |
| 048 - 053
048 - 051 052 053 | Diffuse Horiz. Illuminance
Data Value Flag for Data Source Flag for Data Uncertainty |
0 - 800 I, ? 0 - 9 | Average amount of illuminance in
hundreds of lux received from the sky (excluding the solar disk) on a horizontal surface during the 60 minutes preceding the hour indicated. 0 to 800= 0 to 80,000 lux |
| 054 - 059
054 - 057 058 059 | Zenith Luminance
Data Value Flag for Data Source Flag for Data Uncertainty |
0 - 7000 I, ? 0 - 9 | Average amount of luminance at the
sky's zenith in tens of Cd/m2 during the 60 minutes preceding the hour indicated. 0 to 7000 = 0 to 70,000 Cd/m2 |
| 060 - 063
060 - 061 062 063 | Total Sky Cover
Data Value Flag for Data Source Flag for Data Uncertainty |
0 - 10 A - F 0 - 9 | Amount of sky dome in tenths
covered by clouds or obscuring phenomena at the hour indicated |
| 064 - 067
064 - 065 066 067 | Opaque Sky Cover
Data Value Flag for Data Source Flag for Data Uncertainty |
0 - 10 A - F 0 - 9 | Amount of sky dome in tenths
covered by clouds or obscuring phenomena that prevent observing the sky or higher cloud layers at the hour indicated |
| 068 - 073
068 - 071 072 073 | Dry Bulb Temperature
Data Value Flag for Data Source Flag for Data Uncertainty |
-500 to 500 A - F 0 - 9 | Dry bulb temperature in tenths of °C
at the hour indicated -500 to 500 = -50.0 to 50.0°C |
| 074 - 079
074 - 077 078 079 | Dew Point Temperature
Data Value Flag for Data Source Flag for Data Uncertainty |
-600 to 300 A - F 0 - 9 | Dew point temperature in tenths of
°C at the hour indicated -600 to 300 = -60.0 to 30.0°C |
| 080 - 084
080 - 082 083 084 | Relative Humidity
Data Value Flag for Data Source Flag for Data Uncertainty |
0 - 100 A - F 0 - 9 | Relative humidity in percent at the
hour indicated |
| 085 - 090
085 - 088 089 090 | Atmospheric Pressure
Data Value Flag for Data Source Flag for Data Uncertainty |
700 - 1100 A - F 0 - 9 | Atmospheric pressure at station in
millibars at the hour indicated |
| 091 - 095
091 - 093 094 095 | Wind Direction
Data Value Flag for Data Source Flag for Data Uncertainty |
0 - 360 A - F 0 - 9 | Wind direction in degrees at the hour
indicated. ( N = 0 or 360, E = 90, S = 180,W = 270 ). For calm winds, wind direction equals zero. |
| 096 - 100
096 - 098 099 100 | Wind Speed
Data Value Flag for Data Source Flag for Data Uncertainty |
0 - 400 A - F 0 - 9 | Wind speed in tenths of meters per
second at the hour indicated. 0 to 400 = 0 to 40.0 m/s |
| 101 - 106
101 - 104 105 106 | Visibility
Data Value Flag for Data Source Flag for Data Uncertainty |
0 - 1609 A - F, ? 0 - 9 | Horizontal visibility in tenths of
kilometers at the hour indicated. 7777 = unlimited visibility 0 to 1609 = 0.0 to 160.9 km 9999 = missing data |
| 107 - 113
107 - 111 112 113 | Ceiling Height
Data Value Flag for Data Source Flag for Data Uncertainty |
0 - 30450 A - F, ? 0 - 9 | Ceiling height in meters at the hour
indicated. 77777 = unlimited ceiling height 88888 = cirroform 99999 = missing data |
| 114 - 123
| Present Weather
| See
Appendix B | Present weather conditions denoted by
a 10-digit number. See Appendix B for key to present weather elements. |
| 124 - 128
124 - 126 127 128 | Precipitable Water
Data Value Flag for Data Source Flag for Data Uncertainty |
0 - 100 A - F 0 - 9 | Precipitable water in millimeters at
the hour indicated |
| 129 - 133
129 - 131 132 133 | Aerosol Optical Depth
Data Value Flag for Data Source Flag for Data Uncertainty |
0 - 240 A - F 0 - 9 | Broadband aerosol optical depth
(broad-band turbidity) in thousandths on the day indicated. 0 to 240 = 0.0 to 0.240 |
| 134 - 138
134 - 136 137 138 | Snow Depth
Data Value Flag for Data Source Flag for Data Uncertainty |
0- 150 A - F, ? 0 - 9 | Snow depth in centimeters on the day
indicated. 999 = missing data |
| 139 - 142
139 - 140 141 142 | Days Since Last Snowfall
Data Value Flag for Data Source Flag for Data Uncertainty |
0 - 88 A - F, ? 0 - 9 | Number of days since last snowfall.
88 = 88 or greater days 99 = missing data |
| FORTRAN Sample Format:
(1X, 4I2, 2I4, 7 (I4, A1, I1), 2( I2, A1, I1), 2 (I4, A1, I1), 1(I3, A1, I1), 1( I4, A1, I1), 2 (I3, A1, I1), 1(I4, A1, I1), 1(I5, A1, I1), 10I1, 3 (I3, A1, I1), 1(I2, A1, I1)) C Sample Format: (%2d%2d%2d%2d%4d%4d%4d%1s%1d%4d%1s%1d%4d%1s%1d%4d%1s%1d%4d%1s%1d%4d%1s %1d%4d%1s%1d%2d%1s%1d%2d%1s%1d%4d%1s%1d%4d%1s%1d%3d%1s%1d%4d%1s%1d%3d %1s%1d%3d%1s%1d%4d%1s%1d%5ld%1s%1d%1d%1d%1d%1d%1d%1d%1d%1d%1d%1d%3d%1s %1d%3d%1s%1d%3d%1s%1d%2d%1s%1d) Note: For ceiling height data, integer variable should accept data values as large as 99999. | |||