USCRN/USRCRN FTP DAILY STREAM NCDC provides ftp access to data from the U.S. Climate Reference Network / U.S. Regional Climate Reference Network (USCRN/USRCRN) via anonymous ftp at the address: ftp://ftp.ncdc.noaa.gov/pub/data/uscrn/products/daily01 That directory contains separate subdirectories for each year that the ftp data are available. Each annual subdirectory contains a collection of ASCII files named according to the following convention: CRND01TT-YYYY-${name}.txt where TT = 2-character file format number (currently 03) YYYY = 4-digit year ${name} = Unique station name (state location vector) with spaces replaced by underscores (e.g. AZ_Tucson_11_W) Also contained in the daily01 directory are important announcements relating to the Daily01 product. Please be sure to review these announcements before using any product data. There is also a separate collection of near-real-time files produced daily in: ftp://ftp.ncdc.noaa.gov/pub/data/uscrn/products/daily01/updates This subdirectory contains a collection of annual subdirectories, which contain ASCII files that are named according to the following convention: CRND01TT-YYYYMMDDHHmm.txt where TT = 2-character file format number (currently 03) YYYY = 4-digit local year MM = 2-digit local month (01=Jan, ..., 12=Dec) DD = 2-digit local day of month HH = 2-digit local standard time hour of day (always 23) mm = 2-digit minute (always 59) Each one of these files contains USCRN/USRCRN data for the period of one day ending at local standard time YYYYMMDDHHmm. The 2-character sequence TT indicates the file format number. This number will be changed any time the file format is changed. Each file contains fixed-column formatted lines, each of which represents one hour's observation data from one station. The format of each line is as follows: cols 1 -- 5 [5 chars] WBANNO The station WBAN number. cols 7 -- 14 [8 chars] LST_DATE The Local Standard Time (LST) date of the observation. cols 16 -- 21 [6 chars] CRX_VN The version number of the station datalogger program that was in effect at the time of the observation. cols 23 -- 29 [7 chars] LONGITUDE Station longitude, using WGS-84. cols 31 -- 37 [7 chars] LATITUDE Station latitude, using WGS-84. cols 39 -- 45 [7 chars] T_DAILY_MAX Maximum temperature, in degrees C, during the day. Note: USCRN/USRCRN stations have multiple co-located temperature sensors that record independent measurements. This value is a single temperature maximum that is calculated from the multiple independent measurements. The independent measurements are the maximum for each sensor of 5-minute average temperatures measured every 10 seconds during the day. cols 47 -- 53 [7 chars] T_DAILY_MIN Minimum temperature, in degrees C, during the day. Note: USCRN/USRCRN stations have multiple co-located temperature sensors that record independent measurements. This value is a single temperature minimum that is calculated from the multiple independent measurements. The independent measurements are the minimum for each sensor of 5-minute average temperatures measured every 10 seconds during the day. cols 55 -- 61 [7 chars] T_DAILY_MEAN Mean temperature, in degrees C, calculated using the typical historical approach of (T_DAILY_MAX + T_DAILY_MIN) / 2. cols 63 -- 69 [7 chars] T_DAILY_AVG Average temperature, in degrees C, during the 24 hours of the day. Note: USCRN/USRCRN stations have multiple co-located temperature sensors that record independent measurements. This value is a single temperature that is calculated by averaging 24 full-hour averages derived from the multiple independent measurements of 5-minute intervals during each hour. cols 71 -- 77 [7 chars] P_DAILY_CALC Total amount of precipitation, in mm, recorded during the 24 hours of the day. Note: USCRN/USRCRN stations have multiple independent measures of precipitation; this P_DAILY_CALC value is a single precipitation total that is calculated from the station hourly totals derived from multiple independent measurements of 5-minute intervals during each hour. cols 79 -- 86 [8 chars] SOLARAD_DAILY Total solar energy received, MJ/meter^2, recorded during the day. This value is calculated from the hourly average solar radiation rates and converted to energy by integrating over time. cols 88 -- 88 [1 chars] SUR_TEMP_DAILY_TYPE Type of surface tempearture measurement. 'R' to denote raw surface temperature measurements, 'C' to denote corrected surface temperature measurements, and 'U' when unknown. cols 90 -- 96 [7 chars] SUR_TEMP_DAILY_MAX Maximum 10-second temperature, in degrees C, during the day. cols 98 -- 104 [7 chars] SUR_TEMP_DAILY_MIN Minimum 10-second temperature, in degrees C, during the day. cols 106 -- 112 [7 chars] SUR_TEMP_DAILY_AVG Note: This value is a single temperature that is calculated by averaging 24 full-hour averages. cols 114 -- 120 [7 chars] RH_DAILY_MAX Maximum relative humidity, in %, for the day. Computed from either 5-minute or 60-minute RH averages. Only the two Asheville stations reported an hourly RH value, up to 2007-02-22. All stations now report 5-minute averages. cols 122 -- 128 [7 chars] RH_DAILY_MIN Minimum relative humidity, in %, for the day. Computed from either 5-minute or 60-minute RH averages. Only the two Asheville stations reported an hourly RH value, up to 2007-02-22. All stations now report 5-minute averages. cols 130 -- 136 [7 chars] RH_DAILY_AVG Average relative humidity, in %, for the day. Computed from either 5-minute or 60-minute RH averages. Only the two Asheville stations reported an hourly RH value, up to 2007-02-22. All stations now report 5-minute averages. cols 138 -- 144 [7 chars] SOIL_MOISTURE_5_DAILY Average soil moisture, in fractional volumetric water content, during the entire day at 5 cm below the surface. Note: USCRN/USRCRN stations have multiple co-located soil moisture sensors that record independent measurements. This value is an average of 24 hourly soil moisture values that each are calculated from the multiple independent measurements. cols 146 -- 152 [7 chars] SOIL_MOISTURE_10_DAILY Average soil moisture, in fractional volumetric water content, during the entire day at 10 cm below the surface. Note: USCRN/USRCRN stations have multiple co-located soil moisture sensors that record independent measurements. This value is an average of 24 hourly soil moisture values that each are calculated from the multiple independent measurements. cols 154 -- 160 [7 chars] SOIL_MOISTURE_20_DAILY Average soil moisture, in fractional volumetric water content, during the entire day at 20 cm below the surface. Note: USCRN/USRCRN stations have multiple co-located soil moisture sensors that record independent measurements. This value is an average of 24 hourly soil moisture values that each are calculated from the multiple independent measurements. cols 162 -- 168 [7 chars] SOIL_MOISTURE_50_DAILY Average soil moisture, in fractional volumetric water content, during the entire day at 50 cm below the surface. Note: USCRN/USRCRN stations have multiple co-located soil moisture sensors that record independent measurements. This value is an average of 24 hourly soil moisture values that each are calculated from the multiple independent measurements. cols 170 -- 176 [7 chars] SOIL_MOISTURE_100_DAILY Average soil moisture, in fractional volumetric water content, during the entire day at 100 cm below the surface. Note: USCRN/USRCRN stations have multiple co-located soil moisture sensors that record independent measurements. This value is an average of 24 hourly soil moisture values that each are calculated from the multiple independent measurements. cols 178 -- 184 [7 chars] SOIL_TEMP_5_DAILY Average soil temperature, in degrees C, during the entire day at 5 cm below the surface. Note: USCRN/USRCRN stations have multiple co-located soil temperature sensors that record independent measurements. This value is an average of 24 hourly soil temperature values that each are calculated from the multiple independent measurements. cols 186 -- 192 [7 chars] SOIL_TEMP_10_DAILY Average soil temperature, in degrees C, during the entire day at 10 cm below the surface. Note: USCRN/USRCRN stations have multiple co-located soil temperature sensors that record independent measurements. This value is an average of 24 hourly soil temperature values that each are calculated from the multiple independent measurements. cols 194 -- 200 [7 chars] SOIL_TEMP_20_DAILY Average soil temperature, in degrees C, during the entire day at 20 cm below the surface. Note: USCRN/USRCRN stations have multiple co-located soil temperature sensors that record independent measurements. This value is an average of 24 hourly soil temperature values that each are calculated from the multiple independent measurements. cols 202 -- 208 [7 chars] SOIL_TEMP_50_DAILY Average soil temperature, in degrees C, during the entire day at 50 cm below the surface. Note: USCRN/USRCRN stations have multiple co-located soil temperature sensors that record independent measurements. This value is an average of 24 hourly soil temperature values that each are calculated from the multiple independent measurements. cols 210 -- 216 [7 chars] SOIL_TEMP_100_DAILY Average soil temperature, in degrees C, during the entire day at 100 cm below the surface. Note: USCRN/USRCRN stations have multiple co-located soil temperature sensors that record independent measurements. This value is an average of 24 hourly soil temperature values that each are calculated from the multiple independent measurements. FORMAT CHANGES: 1. [Transition from format '01' to '02'] As of March 22, 2011 15:00 UTC the format of the Daily product was changed by removing the COOPNO (Cooperative Observer Program Number) column from the format. This was the second column in the format, starting at character 7 and ending at character 12. With the removal of this column, all following columns were shifted to the left by 7 characters. The contents of the shifted columns remained the same. 2. [File name prefix revision] As of April 11, 2011 15:00 UTC the file naming convention for Daily01 product files has changed to use a different prefix. Previously the prefix of 'CRNDAILY' was used. It has now been changed to 'CRND01'. This change was made to eliminate versioning confusion and to align naming conventions with the Hourly02 product. 3. [Transition from format '02' to '03'] As of January 7, 2013 15:00 UTC the format of the Daily product was changed by adding the SUR_TEMP_DAILY_TYPE column to the format. This is now the 12th column in the format, starting and ending at character 88. With the addition of this column, all following columns were shifted to the right by 2 characters. The contents of the shifted columns remained the same. IMPORTANT NOTES: 1. All fields are separated from adjacent fields by at least one space. 2. Leading zeros are omitted. 3. Missing data are indicated by the lowest possible integer for a given column format. Such as -9999.0 for 7-character fields with one decimal place or -99.000 for 7-character fields with three decimal places. 4. There are no quality flags for these derived quantities. When the raw data are flagged as erroneous, these derived values are not calculated, and are instead reported as missing. So these fields may be assumed to always be good (unflagged) data, except when they are reported as missing. 5. The update files are named according to the calendar date of the observations. The daily records are generated several times during the next calendar day so as to insure that late arriving data are included. Early in each month, the annual-station files will be reconstructed, both to add the previous month to the current annual file, and to backfill data that were received through manual recovery at the station site as opposed to being received via satellite transmission.