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Comparisons of collocated SeaWinds on QuikSCAT (Ku2000 model function) and buoy winds resulted in the following data sets. Collocation criteria are 25km and 30 minutes.
The data files are in ASCII format, and the format is described below.
Each record consists of 2 lines:
[Line 1: QSCAT data]
Column 1 : Rev no.
2 : WVC row (1-1624)
3 : WVC cell number (1-76)
4 : Date/Time (UTC) yyyy-dddThh:mm:ss.sss
5 : WVC latitude (deg.N)
6 : WVC longitude (deg.E)
7 : Distance from buoy (km)
8 : Number of ambiguities (1-4)
9 : Indicator of selected ambiguity
10 : Data quality flag (0: Good, 1: Flagged)
Bit 0 : ICLASS > 1 (See user's manual)
Bit 1 : SOSAL > 1.9 (See user's manual)
Bit 2-7: always clear (0)
11 : Wind speed - 1st ambiguity (m/s)
12 : Wind direction - 1st ambiguity (deg)
13 : Wind speed - 2nd ambiguity (m/s)
14 : Wind direction - 2nd ambiguity (deg)
15 : Wind speed - 3rd ambiguity (m/s)
16 : Wind direction - 3rd ambiguity (deg)
17 : Wind speed - 4th ambiguity (m/s)
18 : Wind direction - 4th ambiguity (deg)
19 : Wind speed - smoothed (m/s)
20 : Wind direction - smoothed (deg)
21 : SSMI/TMI Rain flag (0: No rain, 1: Rain)
22 : QSCAT Rain flag (0: No rain, 1: Rain)
[Line 2: buoy data]
1 : Year (UT)
2 : Month (UT)
3 : Day (UT)
4 : Hour (UT)
5 : Temporal separation from QSCAT obs. (hour)
6 : Wind direction (deg) - Oceanographic convention
7 : Observed wind speed (m/s)
8 : 10-m neutral equivalent wind speed (m/s)
9 : Air temperature (deg.C)
10 : Sea surface temperature (deg.C)
11 : Relative humidity (%)
12 : Surface pressure (hPa)
13 : Significant waveheight (m)
14 : Average wave period (sec)
Last updated on Jan. 07, 2002.