Bitung (Indonesia) Data Quality Assessment
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. |
