zz = depth below sea/water surface (m)
tt = sea/water temperature (degree Celcius)
ss = salinity (part per thousand)
dc = direction of current (degree)
vc = speed of current (m/s)
Output:
buoy_id=62775 obstime=2011-08-26 04:30:00 lon=-2.28300 lat=43.71240 n=1 zz=0 tt=22.21 buoy_id=52087 obstime=2011-08-26 00:00:00 lon=136.49274 lat=7.86594 n=1 zz=0 tt=28.90 n=2 zz=2 tt=28.90 ss=33.46 ... n=13 zz=750 tt=5.97 ss=34.51 buoy_id=31051 obstime=2011-08-26 04:00:00 lon=-44.92644 lat=-25.28061 PW=13 HW=2.6 n=1 zz=0 tt=21.24 n=2 zz=7 dc=206 vc=0.4 n=3 zz=30 dc=21 vc=0.4 n=4 zz=55 dc=205 vc=0.4