Quality Assessment of sea level data by the TOGA Sea Level Center/National Oceanographic Data Center Joint Archive for Sea Level.
Station
Bitung
Latitude
01° 26.4' N
Country
Indonesia
Longitude
125° 11.6' E
JASL #
033A
Time Meridian
120° E (GMT + 8 hr)
GLOSS #
069
TOGA #
P007
NODC #
10121501
Contributor:
BAKOSURTANAL, Indonesia J. Raya Jakarta - Borog Km 46 P.O. Box 46 Cibinong, Indonesia
Originator:
Same
Original Data:
Digital
Instrument Type:
Fischer and Porter Analog-to-Digital Recorder
Digitized Interval:
15 minutes
Present Data:
Hourly, daily, and monthly values obtained by:
Hourly:
(pre-1987) Nine-point triangular filter centred on the hour with respective periods of the 95, 50, and 5% amplitude point of the filter response at 623.6, 177.0, and 103.7 minutes;(1987+) three-point Hanning filter centered 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:
14 December 1986 - 30 December 1990
Gaps >1 Month:
None
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 changes in the reference level. The residuals (observed data minus predicted tides) have spikes periodically. However, the installation is in a region with complex tides that the harmonic analysis can not completely resolve, which may explain this spikey signature.
