ALOHA Cabled Observatory (ACO): Acoustic Doppler Current Profiler (ADCP): Velocity
The University of Hawaii's ALOHA ("A Long-term Oligotrophic Habitat Assessment") Cabled Observatory (ACO) is located 100 km north of the island of Oahu, Hawaii (22 45'N, 158W) in the North Pacific Ocean. It provides real-time oceanographic observations from a depth of about 4,800 m via a submarine fiber optic cable that comes ashore at Makaha on Oahu. This data set provides measurements of ocean current velocity at the ACO from a 250 kHz SonTek acoustic doppler current profiler (ADCP) at 1.83 m above the ocean bottom for the most recent 7 days. Velocities are flagged bad if the amplitude is excessively low or high. An amplitude is high if it exceeds the average of the ping before and the ping after by 20 counts. An amplitude is low if less than 6 counts. After this the velocities are flagged bad if the absolute deviation of the vertical velocity from its ensemble median exceeds 0.15 m/s or if its value is less than -0.25 m/s.
Complete Metadata
| @type | dcat:Dataset |
|---|---|
| accessLevel | public |
| contactPoint |
{
"fn": "University of Hawaii at Manoa",
"@type": "vcard:Contact",
"hasEmail": "mailto:mandujan@soest.hawaii.edu"
}
|
| describedByType | application/octet-steam |
| description | The University of Hawaii's ALOHA ("A Long-term Oligotrophic Habitat Assessment") Cabled Observatory (ACO) is located 100 km north of the island of Oahu, Hawaii (22 45'N, 158W) in the North Pacific Ocean. It provides real-time oceanographic observations from a depth of about 4,800 m via a submarine fiber optic cable that comes ashore at Makaha on Oahu. This data set provides measurements of ocean current velocity at the ACO from a 250 kHz SonTek acoustic doppler current profiler (ADCP) at 1.83 m above the ocean bottom for the most recent 7 days. Velocities are flagged bad if the amplitude is excessively low or high. An amplitude is high if it exceeds the average of the ping before and the ping after by 20 counts. An amplitude is low if less than 6 counts. After this the velocities are flagged bad if the absolute deviation of the vertical velocity from its ensemble median exceeds 0.15 m/s or if its value is less than -0.25 m/s. |
| distribution |
[
{
"@type": "dcat:Distribution",
"title": "Data Subset Form",
"accessURL": "https://pae-paha.pacioos.hawaii.edu/erddap/tabledap/aco_adcp_vel.html",
"description": "ERDDAP's version of the OPeNDAP .html web page for this dataset. Specify a subset of the dataset and download the data via OPeNDAP or in many different file types.",
"describedByType": "application/octet-steam"
},
{
"@type": "dcat:Distribution",
"title": "Make-A-Graph Form",
"mediaType": "placeholder/value",
"description": "ERDDAP's Make-A-Graph .html web page for this dataset. Create an image with a map or graph of a subset of the data.",
"downloadURL": "https://pae-paha.pacioos.hawaii.edu/erddap/tabledap/aco_adcp_vel.graph",
"describedByType": "application/octet-steam"
},
{
"@type": "dcat:Distribution",
"title": "Related URL",
"mediaType": "placeholder/value",
"description": "This URL provides additional information related to this dataset.",
"downloadURL": "https://dods.ndbc.noaa.gov/oceansites/",
"describedByType": "application/octet-steam"
},
{
"@type": "dcat:Distribution",
"accessURL": "https://www.soest.hawaii.edu/HOT_WOCE/staff/Fernando.html",
"describedByType": "application/octet-steam"
}
]
|
| identifier | aco_adcp_vel |
| isPartOf | Pacific Islands Ocean Observing System (PacIOOS) |
| issued | 2012-05-01T00:00:00.000+00:00 |
| keyword |
[
"Earth Science > Oceans > Ocean Currents > Currents",
"In Situ Ocean-based Platforms > Ocean Platform/Ocean Stations",
"In Situ/Laboratory Instruments > Profilers/Sounders > Acoustic Sounders > > ADCP > Acoustic Doppler Current Profiler",
"Ocean > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Oahu",
"Continent > North America > United States Of America > Hawaii",
"PacIOOS > Pacific Islands Ocean Observing System",
"PacIOOS > Pacific Islands Ocean Observing System",
"depth",
"eastward_sea_water_velocity",
"latitude",
"longitude",
"northward_sea_water_velocity",
"time",
"upward_sea_water_velocity"
]
|
| landingPage | https://www.soest.hawaii.edu/HOT_WOCE/staff/Fernando.html |
| language |
[]
|
| license | https://creativecommons.org/publicdomain/zero/1.0/ |
| modified | 2012-06-21T00:00:00.000+00:00 |
| publisher |
{
"name": "Pacific Islands Ocean Observing System (PacIOOS)",
"@type": "org:Organization"
}
|
| spatial | -158.0062,22.7387,-158.0062,22.7387 |
| temporal | 2025-02-12T00:00:00+00:00/2025-02-19T00:00:00+00:00 |
| title | ALOHA Cabled Observatory (ACO): Acoustic Doppler Current Profiler (ADCP): Velocity |
