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TAO performance continues to improve after fourth service cruise. Read more...

Important NDBC Web Site Changes

NDBC is making several format changes to the headers of its web data files. Note! These changes apply to the data files, not the station page's current observations listing! Click the Customer Survey link at the bottom of this page to give feedback on the changes.

Description

1. A "#" sign starts header or other metadata lines (April 10th, 2007).

This will facilitate having a second header line for units of measurement (see below) and other lines interspersed in the data for significant changes in metadata, such as a station position change.

2. Column headings were standardized (April 10th, 2007).

Some columns for the same measurement had different headings, depending on which data group they were in. For example, the column heading for air pressure was PRES in one list and BARO in another. PRES will be the standard for air pressure, APD will be the standard for Average Wave Period, WVHT will be the standard for Significant Wave Height, GST will be the standard for wind Gust speed.

3. A second header line was added to specify units of measurement (April 10th, 2007).

The 5-day and 45-day realtime data files will be modified to include a second header line that specifies the unit of measure for each column. Generally, the units in the data files are different than the units on the station pages, which has caused misinterpretation. Note! The units are not changing - we are just adding information about the units. Raw spectral wave data files will not have the second header, as these raw data are unitless. See Measurement Descriptions and Units for more information on the units of measure used on the NDBC web site.

NOTE! This year's monthly historical files will use the new format, beginning with the 2007 January files. Prior year historical files will remain in the old format!

Example of standard met data file/list
#YY  MM DD hh mm WDIR WSPD GST  WVHT   DPD   APD MWD   PRES  ATMP  WTMP  DEWP  VIS PTDY  TIDE
#yr  mo dy hr mn degT m/s  m/s     m   sec   sec degT   hPa  degC  degC  degC   mi  hPa    ft
2007 04 15 13 50 120  4.0  6.0   0.4     3    MM  MM 1023.4  20.6  22.5  10.8   MM +1.7    MM
2007 04 15 12 50 140  4.0  5.0   0.4     4    MM  MM 1023.0  20.4  22.4  10.3   MM +1.7    MM
2007 04 15 11 50 120  5.0  6.0   0.4     3    MM  MM 1022.1  20.0  22.4  10.9   MM +0.6    MM
Example of continuous wind data format file/list
#YY  MM DD hh mm WDIR WSPD GDR GST GTIME
#yr  mo dy hr mn degT m/s degT m/s hhmm
2007 03 05 06 20 314  8.0 320 10.0 0604
2007 03 05 06 10 315  7.8 999 99.0 9999
2007 03 05 06 00 314  7.8 999 99.0 9999
Example of wave summary data file/list
#YY  MM DD hh mm WVHT  SwH  SwP  WWH  WWP SwD WWD  STEEPNESS  APD MWD
#yr  mo dy hr mn    m    m  sec    m  sec  -  degT     -      sec degT
2007 03 05 05 32  1.5  0.5 11.0  1.5  9.0   W  MM    AVERAGE   MM -99
2007 03 05 05 02  1.5  1.0 11.0  1.5  9.0 WNW  MM    AVERAGE   MM -99
Example of raw wave spectra data file/list
#YY  MM DD hh mm Sep_Freq  < spec_1 (freq_1) spec_2 (freq_2) spec_3 (freq_3) ... >
2007 03 05 06 30 0.143 0.000 (0.033) 0.000 (0.037) 0.000 (0.043) 0.000 (0.048) 0.000 (0.053) 0.000 (0.058) 0.000 (0.062) 0.000 (0.068) 0.000 (0.073) 0.000 (0.077) 0.000 (0.083) 0.000 (0.087) 0.000 (0.092) 0.000 (0.100) 0.000 (0.110) 0.199 (0.120) 0.176 (0.130) 0.796 (0.140) 0.550 (0.150) 0.374 (0.160) 0.702 (0.170) 0.842 (0.180) 0.527 (0.190) 0.562 (0.200) 0.725 (0.210) 0.702 (0.220) 0.761 (0.230) 0.667 (0.240) 1.170 (0.250) 0.538 (0.260) 0.679 (0.270) 0.351 (0.280) 0.421 (0.290) 0.339 (0.300) 0.304 (0.310) 0.117 (0.320) 0.152 (0.330) 0.140 (0.340) 0.105 (0.350) 0.070 (0.365) 0.105 (0.385) 0.035 (0.405) 0.047 (0.425) 0.012 (0.445) 0.012 (0.465) 0.000 (0.485) 
Example of raw spectral wave (alpha1) data file/list
#YY  MM DD hh mm alpha1_1 (freq_1) alpha1_2 (freq_2) alpha1_3 (freq_3) ... >
2007 03 05 06 30 999.0 (0.033) 999.0 (0.037) 999.0 (0.043) 999.0 (0.048) 999.0 (0.053) 999.0 (0.058) 999.0 (0.062) 999.0 (0.068) 999.0 (0.073) 999.0 (0.077) 999.0 (0.083) 999.0 (0.087) 999.0 (0.092) 296.0 (0.100) 144.0 (0.110) 204.0 (0.120) 188.0 (0.130) 192.0 (0.140) 196.0 (0.150) 200.0 (0.160) 216.0 (0.170) 216.0 (0.180) 232.0 (0.190) 264.0 (0.200) 320.0 (0.210) 328.0 (0.220) 320.0 (0.230) 324.0 (0.240) 316.0 (0.250) 316.0 (0.260) 324.0 (0.270) 320.0 (0.280) 312.0 (0.290) 324.0 (0.300) 324.0 (0.310) 312.0 (0.320) 328.0 (0.330) 312.0 (0.340) 336.0 (0.350) 332.0 (0.365) 312.0 (0.385) 340.0 (0.405) 336.0 (0.425) 328.0 (0.445) 316.0 (0.465) 340.0 (0.485) 
Example of raw spectral wave (alpha2) data file/list
#YY  MM DD hh mm alpha2_1 (freq_1) alpha2_2 (freq_2) alpha2_3 (freq_3) ... >
2007 03 05 06 30 999.0 (0.033) 999.0 (0.037) 999.0 (0.043) 999.0 (0.048) 999.0 (0.053) 999.0 (0.058) 999.0 (0.062) 999.0 (0.068) 999.0 (0.073) 999.0 (0.077) 999.0 (0.083) 999.0 (0.087) 999.0 (0.092) 208.0 (0.100) 144.0 (0.110) 180.0 (0.120) 184.0 (0.130) 176.0 (0.140) 196.0 (0.150) 200.0 (0.160) 216.0 (0.170) 212.0 (0.180) 196.0 (0.190) 276.0 (0.200) 328.0 (0.210) 336.0 (0.220) 328.0 (0.230) 328.0 (0.240) 312.0 (0.250) 320.0 (0.260) 324.0 (0.270) 316.0 (0.280) 320.0 (0.290) 324.0 (0.300) 320.0 (0.310) 312.0 (0.320) 328.0 (0.330) 308.0 (0.340) 340.0 (0.350) 336.0 (0.365) 304.0 (0.385) 4.0 (0.405) 8.0 (0.425) 316.0 (0.445) 300.0 (0.465) 348.0 (0.485) 
Example of raw spectral wave (r1) data file/list
#YY  MM DD hh mm r1_1 (freq_1) r1_2 (freq_2) r1_3 (freq_3) ... >
2007 03 05 06 30 999.00 (0.033) 999.00 (0.037) 999.00 (0.043) 999.00 (0.048) 999.00 (0.053) 999.00 (0.058) 999.00 (0.062) 999.00 (0.068) 999.00 (0.073) 999.00 (0.077) 999.00 (0.083) 999.00 (0.087) 999.00 (0.092) 0.30 (0.100) 0.33 (0.110) 0.56 (0.120) 0.81 (0.130) 0.72 (0.140) 0.87 (0.150) 0.94 (0.160) 0.91 (0.170) 0.81 (0.180) 0.59 (0.190) 0.63 (0.200) 0.81 (0.210) 0.81 (0.220) 0.84 (0.230) 0.89 (0.240) 0.86 (0.250) 0.76 (0.260) 0.91 (0.270) 0.80 (0.280) 0.78 (0.290) 0.91 (0.300) 0.70 (0.310) 0.91 (0.320) 0.77 (0.330) 0.76 (0.340) 0.78 (0.350) 0.84 (0.365) 0.80 (0.385) 0.64 (0.405) 0.64 (0.425) 0.68 (0.445) 0.67 (0.465) 0.74 (0.485) 
Example of raw spectral wave (r2) data file/list
#YY  MM DD hh mm r2_1 (freq_1) r2_2 (freq_2) r2_3 (freq_3) ... > 
2007 03 05 06 30 999.00 (0.033) 999.00 (0.037) 999.00 (0.043) 999.00 (0.048) 999.00 (0.053) 999.00 (0.058) 999.00 (0.062) 999.00 (0.068) 999.00 (0.073) 999.00 (0.077) 999.00 (0.083) 999.00 (0.087) 999.00 (0.092) 0.11 (0.100) 0.41 (0.110) 0.42 (0.120) 0.67 (0.130) 0.45 (0.140) 0.69 (0.150) 0.84 (0.160) 0.76 (0.170) 0.69 (0.180) 0.34 (0.190) 0.20 (0.200) 0.62 (0.210) 0.60 (0.220) 0.58 (0.230) 0.72 (0.240) 0.56 (0.250) 0.38 (0.260) 0.73 (0.270) 0.42 (0.280) 0.40 (0.290) 0.76 (0.300) 0.20 (0.310) 0.73 (0.320) 0.38 (0.330) 0.34 (0.340) 0.39 (0.350) 0.59 (0.365) 0.45 (0.385) 0.32 (0.405) 0.20 (0.425) 0.16 (0.445) 0.08 (0.465) 0.42 (0.485) 
Example of oceanographic data file/list
#YY  MM DD hh mm DEPTH  OTMP   COND   SAL   O2% O2PPM  CLCON  TURB    PH    EH
#yr  mo dy hr mn     m  degC  mS/cm   psu     %   ppm   ug/l   FTU     -    mv
2007 04 27 11 00     2 25.13  55.18 36.45  33.1  2.21   0.06    MM  0.00 98.28
2007 04 27 10 00     2 25.15  55.27 36.45  33.3  2.22   0.06    MM  0.00 95.93
2007 04 27 09 00     2 25.15  55.37 36.45  33.3  2.21   0.06    MM  0.00 94.80
Example of solar radiation data file/list
#YY  MM DD hh mm  SRAD1  SWRAD  LWRAD
#yr  mo dy hr mn   w/m2   w/m2   w/m2
2007 03 05 06 30    0.0     MM     MM
2007 03 05 06 00    0.0     MM     MM
Example of DART data file/list
#YY  MM DD hh mm ss T   HEIGHT
#yr  mo dy hr mn  s -        m 
2007 03 05 06 00 00 1 5842.604
2007 03 05 05 45 00 1 5842.586
2007 03 05 05 30 00 1 5842.566
Example of ocean current (adcp) data file/list
#YY  MM DD hh mm DEP01 DIR01 SPD01 DEP02 DIR02 SPD02 DEP03 DIR03 SPD03 DEP04 DIR04 SPD04 DEP05 DIR05 SPD05 DEP06 DIR06 SPD06 DEP07 DIR07 SPD07 DEP08 DIR08 SPD08 DEP09 DIR09 SPD09 DEP10 DIR10 SPD10 DEP11 DIR11 SPD11 DEP12 DIR12 SPD12 DEP13 DIR13 SPD13 DEP14 DIR14 SPD14 DEP15 DIR15 SPD15 DEP16 DIR16 SPD16 DEP17 DIR17 SPD17 DEP18 DIR18 SPD18 DEP19 DIR19 SPD19 DEP20 DIR20 SPD20
#yr  mo dy hr mn     m  degT  cm/s     m  degT  cm/s     m  degT  cm/s     m  degT  cm/s     m  degT  cm/s     m  degT  cm/s     m  degT  cm/s     m  degT  cm/s     m  degT  cm/s     m  degT  cm/s     m  degT  cm/s     m  degT  cm/s     m  degT  cm/s     m  degT  cm/s     m  degT  cm/s     m  degT  cm/s     m  degT  cm/s     m  degT  cm/s     m  degT  cm/s     m  degT  cm/s
2007 03 05 06 30     2   150     7     3   160     7     5   180     6     7   180     7     9   190     7    11   200     8    13   210     8    15   210     8    17   210     9    19   210     9    21   210     9    23   220     9    25   230     8    27   180     2
Example of expanded ocean current (adcp2) data file/list
#YY  MM DD hh mm I Bin   Depth Dir Speed ErrVl VerVl %Good3 %Good4 %GoodE   EI1   EI2   EI3   EI4   CM1   CM2   CM3   CM4 Flags
#yr  mo dy hr mn -   -     m  degT  cm/s  cm/s  cm/s      %      %      %     -     -     -     -     -     -     -     - -
2007 03 05 06 20 0   1    51.0  97  12.6  -0.5  -3.5     99     99     99   224   220   216   227     0     0     0     0 133313330
Example of hourly rain data file/list
#YY  MM DD hh mm  ACCUM
#yr  mo dy hr mn    mm
2007 03 05 04 30   0.0 
2007 03 05 03 30   0.0 
2007 03 05 02 30   0.0 
Example of 10 minute rain (rain10) data file/list
#YY  MM DD hh mm   RATE
#yr  mo dy hr mn   mm/h
2007 03 05 05 30   0.0 
2007 03 05 05 20   0.0 
2007 03 05 05 10   0.0 
Example of 24 hour rain (rain24) data file/list
#YY  MM DD hh mm   RATE  PCT  SDEV
#yr  mo dy hr mn   mm/h   %     -
2007 03 04 12 00   0.0   0.0   0.0 
2007 03 03 12 00   0.0   0.0   0.0 
Example of derived meteorological data file/list
#YY  MM DD hh mm CHILL  HEAT   ICE WSPD10 WSPD20
#yr  mo dy hr mn  degC  degC in/hr    m/s    m/s
2007 03 05 20 50    MM    MM    MM      8      8
2007 03 05 19 50    MM    MM    MM      9      9
2007 03 05 18 50    MM    MM    MM      8      9
Example of PIRATA and drifter data files/list
#YY  MM DD hhmm     LAT      LON WDIR WSPD GST   PRES PTDY ATMP WTMP
#yr  mo dy hrmn     deg      deg degT m/s  m/s    hPa  hPa degC degC
2007 03 06 1700   11.50   -38.01 040  9.3   MM     MM   MM 25.0 25.1
2007 03 06 1600   11.50   -38.02 040  9.3   MM     MM   MM 24.9 25.1
2007 03 06 1400   11.50   -38.03 050  8.8   MM     MM   MM 25.0 25.1
Example of supplemental data file/list
#YY  MM DD hh mm   PRES PTIME  WSPD  WDIR WTIME
#yr  mo dy hr mn    hPa  hhmm   m/s  degT  hhmm
2007 03 06 12 00     MM    MM  10.0    44  1145
2007 03 06 11 00     MM    MM  10.0    33  1037
2007 03 06 10 00     MM    MM  10.5    40  0945
Example of ship obs data file/list
#SHIP_ID  YY  MM DD hh   LAT    LON WDIR WSPD GST  WVHT   DPD   APD MWD  PRES   ATMP  WTMP  DEWP  VIS  PTDY  TCC S1HT S1PD S1DIR S2HT S2PD S2DIR II IE IR IC IS Ib ID Iz
#station  yr  mo dy hr   deg    deg degT m/s  m/s     m   sec   sec degT  hPa   degC  degC  degC   mi   hPa  8th    m  sec  degT    m  sec  degT  -  -  -  -  -  -  -  -
SHIP     2007 03 05 21  71.6   22.5 190 15.0   MM   2.1     5    MM  MM 1017.9  -0.5    MM  -6.9   MM  -1.2   MM   MM   MM    MM   MM   MM    MM MM MM MM MM MM MM MM MM
46633    2007 03 05 21  44.3 -131.3  MM   MM   MM    MM    MM    MM  MM 1010.5    MM   9.8    MM   MM  -1.1   MM   MM   MM    MM   MM   MM    MM MM MM MM MM MM MM MM MM

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