Davao (Philippines) 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 | Davao | Latitude | 07° 05.0' N |
|---|---|---|---|
| Country | Philippines | Longitude | 125° 38.0' E |
| JASL # | 372A | Time Meridian: | 120E (GMT + 8 hr) |
| GLOSS # | 071 | TOGA # | P009 |
| NODC # | 10127501 |
| Contributor: | Oceanographic Surveys Division NAMRIA, Binondo Branch P. O. Box 1620 Manila, Philippines |
|---|---|
| Originator: | Same |
| Original Data: | Analog |
| Instrument Type: | A.OTT, gravity type |
| Digitzd Interval: | One hour |
| Present Data: | Hourly, daily, and monthly values obtained by: |
| Hourly: | The original digitizing interval was hourly |
| 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: | 01 January 1984 - 30 June 1990 |
| 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 a historic fixed bench mark (1951) |
| Comment: | A suspicious signature exists in 1986. It appears from the daily averages to be a reference level shift of about 20 cm on 30 November. A similar feature of less magnitude exists at the same time for Jolo and Legaspi; thus the possibility of the suspicious signature being real exists. The originators have confirmed that no errors were obvious in the analog chart or processing. The numerous questionable fluctuations below may be a result of inaccurate timing of the gauge and/or from the tidal analysis not being able to resolve certain harmonics. Typhoon activity did not pass near. |
