GLOSS Station Handbook
Station information sheet
| General | |
| GLOSS number | 109 |
| Station name | Johnston Is., Hawaiian Is. |
| Country | U.S.A. |
| Time zone | 165W, GMT - 11hrs |
| Latitude (+ve N) | 16.73333 |
| Longitude (+ve E) | -169.53333 |
| Ocean | Pacific |
| Observation period(s) | 1950- |
| Responsible country | U.S.A. |
| Authority responsible for tide gauge | NOAA, National Ocean Service, 1305 East-West Highway, Silver Spring, MD 20910-3281, USA |
| GLOSS contact | USA |
| Committed to GLOSS | Yes |
| Operational | Yes |
| Location map |  |
| Instrumentation | |
| Float | Yes |
| Pressure | No |
| Bubbler | Yes |
| Acoustic | Yes |
| Radar | No |
| Data | |
| Digital data | Yes |
| Additional parameters | Surface temperature, density |
| Data acquisition rate | Digital gauge: 6 minute interval (after 1975) Analog gauge: hourly heights (before 1975) |
| Fast delivery data at UHSLC |   |
| High frequency data at BODC |  |
| High frequency data at UHSLC | |
| Real-time data available | Yes |
| Real-time data transmitted to GLOSS Fast Centre |  |
| Additional parameters (real-time) | Surface temperature, density |
| Benchmarks | |
| Tide gauge benchmarks | Benchmark 13(1955) is the primary benchmark (PBM) stamped 'NO 13 1955' set in a concrete bulkhead cap at the inshore end of the small boat pier |
| Benchmark relationships | TGBM is 9.35ft above Tide Gauge Zero (Station Datum) NOAA Chart Datum (MLLW) is 1.74ft above Station Datum Mean Sea Level (1960-1978) is 2.81ft above Station Datum |
| Auxiliary benchmarks | 10 additional benchmarks are levelled to the TGBM and the Tide Station on a yearly basis (BM 21, BM 28, BM 22, BM 19, BM L, BM 6, BM 12, BM 14, BM MON JOHN, BM NO 1 JOE) |
| Data at PSMSL | |
| Annual MSL (RLR) data | |
| Annual MSL (RLR) plot | |
| PSMSL code | 598 |
| Other relevant codes | UHSLC 052 |
| Additional information | |
| Other relevant information | NOAA can no longer travel to the gauge |
| Last updated | 1993-12-05 |
