Cocos (Australia) Data Quality Assessment

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

Station Cocos Latitude 12° 07.0' S
Country Australia Longitude 096° 54.0' E
JASL # 171A Time Meridian 105E (GMT + 6.5 hr)
GLOSS # 046 TOGA # I048
NODC # 31092601
Contributor: CSIRO Division of Oceanography GPO Box 1538 Hobart, Tasmania 7001
Originator: Same
Original Data: Digital
Instrument Type: Leupold Stevens analog-to-digital recorder
Digitized Interval: 6 minute
Present Data: Hourly, daily, and monthly values obtained by:
Hourly: Three-point Hanning centred on the hour
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: 11 December 1985 - 30 September 1989
Gaps > 1 Month: 31 July 1988 - 01 January 1989
Time Reference: GMT (hours 00-23)
Space-filler Flag: -9999
Units: Millimeters
Missing Data Flag: 99999
Reference Level: All heights have been referred to the station tide staff zero which is linked to fixed bench marks.
Comment: The daily and monthly means reveal no apparent reference level changes or trends.