Naha (Japan) Data Quality Assessment

Quality assessment of sea level data by the TOGA Sea Level Centre/National Oceanographic Data Center Joint Archive for Sea Level.

Station Naha Latitude 26° 13.0' N
Country Japan Longitude 127° 40.0' E
JASL # 355A Time Meridian 135° E (GMT + 9 hr)
GLOSS # 081 TOGA # P012
NODC # 12126701
Contributor: Japan Ocean. Data Center Hydrographic Dept. Maritime Safety Agency 3-1,Tsukiji, 5-Chome, Chuo-ku Tokyo 104 Japan
Originator: Same
Original Data: Unconfirmed
Instrument Type: FUESS (1966-1972), LFT-4 (1973-1986)
Digitized Interval: Unconfirmed
Present Data: Hourly, daily, and monthly values obtained by:
Hourly: Unconfirmed.
Daily: 119-point convolution filter (Bloomfield, 1976) centred on noon applied to the hourly data with respective periods of the 95, 50, and 5% amplitude points at 124.0, 60.2, and 40.2 hours.
Monthly: Simple average of all daily values; calculated if 7 or fewer days are missing.
Span of Data: 31 July 1966 - 31 December 1986
Gaps > 1 Month: None
Time Reference: GMT (hours 00-23)
Space-filler Flag: -9999
Units: Millimeters
Missing Data Flag: 99999
Reference Level: All data are referred to tide gauge zero and linked to historic fixed bench marks.
Comment: The daily or monthly means do not reveal any obvious reference level shifts. Most questionable fluctuations are related to timing problems with the gauge.