Padang, Sumatera Barat
- Period
- 01 Jan 2026 — 01 Agu 2026212 days
- Datum
- Nol sensor stasiun (bukan MSL)
- gaps
- 1333 jam
- Source
- IOC Sea Level Station Monitoring Facility (UNESCO/IOC & VLIZ)
Source, licence and datum notes
Licence: Akses terbuka dengan kewajiban sitasi (VLIZ/IOC, DOI 10.14284/482)
Flanders Marine Institute (VLIZ); Intergovernmental Oceanographic Commission (IOC) (2026): Sea level station monitoring facility. https://www.ioc-sealevelmonitoring.org — DOI 10.14284/482
Not for navigationThe official Indonesian tide tables are published by Pushidrosal.
Methods
Method comparison
Residual RMS — Least squares
0.0835m
Residual RMS — Admiralty
0.0846m
Condition number κ — Least squares
1.52
| Constituent | H — Least squares | H — Admiralty | Difference H | g — Least squares | g — Admiralty | Difference g | Determination |
|---|---|---|---|---|---|---|---|
| M2 | 0.3576 | 0.3575 | 0.0001 | 337.7 | 338.5 | -0.8 | Direct |
| S2 | 0.1487 | 0.1505 | -0.0018 | 20.6 | 20.8 | -0.2 | Direct |
| K1 | 0.1232 | 0.1257 | -0.0025 | 359.5 | 1.5 | -2.1 | Direct |
| O1 | 0.0764 | 0.0781 | -0.0017 | 348.6 | 347.7 | 0.9 | Direct |
| N2 | 0.0748 | 0.0728 | 0.0020 | 321.0 | 312.3 | 8.6 | Direct |
| K2 | 0.0415 | 0.0406 | 0.0009 | 14.4 | 20.8 | -6.4 | Inferred |
| P1 | 0.0306 | 0.0416 | -0.0111 | 6.2 | 1.5 | 4.7 | Inferred |
| M4 | 0.0168 | 0.0163 | 0.0004 | 36.1 | 38.1 | -2.1 | Direct |
| MS4 | 0.0066 | 0.0067 | -0.0000 | 151.8 | 145.6 | 6.2 | Direct |
Admiralty infers K2, P1 from its neighbours through fixed ratios rather than solving for them. Least squares solves every constituent jointly and so accounts for the correlation between neighbours; that is the only fundamental difference between the two here.
The Admiralty implementation here is its projection-and-inference scheme, not a reproduction of the printed NP 159 tabulation and its filtering multipliers.