Air Gap Data from CO-OPS
Center for Operational Oceanographic Products and Services
Data Set
(DS)
| ID: 71336
| Published / External
Created: 2023-11-09
|
Last Modified: 2024-01-18
Library (LIB) | ID: 37109
ID: 71336
Data Set (DS)
* Discovery• First Pass
» Metadata Rubric
Item Identification
* » Title | Air Gap Data from CO-OPS |
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Short Name | Air Gap |
* Status | On Going |
Creation Date | 2004-11 |
Revision Date | |
• Publication Date | 2004-11 |
* » Abstract |
The Center for Operational Oceanographic Products and Services (CO-OPS) of the National Ocean Service (NOS), an organizational element of NOAA, operates and maintains a network of downward-looking long-range microwave sensors for determining the instantaneous clearance or air gap below bridges that span navigable waterways in the U.S. These observations are part of the National Physical Oceanographic Real-Time System (PORTS) Program. The data collected are used to ensure safety of navigation, improve economic efficiency, and protect coastal resources. Included in this data collection are preliminary 6-minute air gap observations from various bridges spanning navigable waterways in the U.S. |
* Purpose |
The mission of NOAA's National Ocean Service's (NOS) Center for Operational Oceanographic Products and Services (CO-OPS) is to provide the national infrastructure, and the scientific and technical expertise to monitor, assess, and distribute tide, water level, tidal current, meteorological and other coastal oceanographic products and services necessary to support NOAA's mission. |
Notes | |
Other Citation Details | |
• Supplemental Information |
Air gap data are provided through the Physical Oceanographic Real-Time System (PORTS (trademark)) partnership. Under the appropriation specific to PORTS (trademark), CO-OPS manages services for data ingestion, processing, 24-hour real-time monitoring and dissemination of the data. Air gap data and surrounding tides, currents, and meteorological conditions help vessel pilots safely enter and leave many seaports. This information is critical for pilots to safely navigate a ship under a bridge, especially as U.S. seaports grow and vessels continue to increase in size. |
DOI (Digital Object Identifier) | None |
DOI Registration Authority | |
DOI Issue Date |
Keywords
Theme Keywords
Thesaurus | Keyword |
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None | Air Gap |
None | PORTS > Physical Oceanographic Real-Time System |
Temporal Keywords
Thesaurus | Keyword |
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* Spatial Keywords
Thesaurus | Keyword |
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Global Change Master Directory (GCMD) Location Keywords | CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > CALIFORNIA |
Global Change Master Directory (GCMD) Location Keywords | CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > DELAWARE |
Global Change Master Directory (GCMD) Location Keywords | CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > FLORIDA |
Global Change Master Directory (GCMD) Location Keywords | CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > GEORGIA |
Global Change Master Directory (GCMD) Location Keywords | CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > LOUISIANA |
Global Change Master Directory (GCMD) Location Keywords | CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > MARYLAND |
Global Change Master Directory (GCMD) Location Keywords | CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > NEW JERSEY |
Global Change Master Directory (GCMD) Location Keywords | CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > NEW YORK |
Global Change Master Directory (GCMD) Location Keywords | CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > PENNSYLVANIA |
Global Change Master Directory (GCMD) Location Keywords | CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > SOUTH CAROLINA |
Stratum Keywords
Thesaurus | Keyword |
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Instrument Keywords
Thesaurus | Keyword |
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Global Change Master Directory (GCMD) Instrument Keywords | AMI > Active Microwave Instrument |
Platform Keywords
Thesaurus | Keyword |
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Physical Location
• » Organization | Center for Operational Oceanographic Products and Services |
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• » City | Silver Spring |
• » State/Province | MD |
• Country | |
• » Location Description |
Data Set Information
* Data Set Scope Code | Data Set |
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• Data Set Type | mixed |
• Maintenance Frequency | As Needed |
Maintenance Note | |
» Data Presentation Form | Plots, downloadable data (CSV, JSON, XML) |
• Entity Attribute Overview |
An Air Gap sensor is a downward-looking long-range microwave instrument used for determining the instantaneous clearance (air gap) below various bridges or overpasses that span navigable waterways in the U.S. The data collected are used to ensure safety of navigation, improve economic efficiency, and protect coastal resources. These real-time data are provided at 6-minute intervals. They are released for limited public use as preliminary data, to be used only with appropriate caution when clearing the bridge. |
Entity Attribute Detail Citation |
Latest detailed information on sensors and accuracy can be found at: https://tidesandcurrents.noaa.gov/publications/CO-OPS_Measurement_Spec.pdf |
Entity Attribute Detail URL | https://tidesandcurrents.noaa.gov/publications/CO-OPS_Measurement_Spec.pdf |
Distribution Liability |
The air gap systems have been created by NOAA/NOS to provide the maritime community with improved information of bridge clearances. These real-time data are accurate to within +/- 1 inch. They are released for limited public use as preliminary data, to be used only with appropriate caution when clearing the bridge. |
Data Set Credit | NOAA's National Ocean Service, CO-OPS, and the PORTS Partnerships |
Support Roles
* » Support Role | Data Steward |
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* » Date Effective From | 2016 |
Date Effective To | |
Position | Stakeholder Services Branch |
Email Address | tide.predictions@noaa.gov |
Phone | 301-713-2815 |
Fax | |
Mobile | |
URL | |
Business Hours | |
Contact Instructions |
* » Support Role | Distributor |
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* » Date Effective From | 2023 |
Date Effective To | |
Organization | Center for Operational Oceanographic Products and Services (CO-OPS) |
Email Address | |
Phone | |
Fax | |
Mobile | |
URL | https://tidesandcurrents.noaa.gov/ |
Business Hours | |
Contact Instructions |
https://tidesandcurrents.noaa.gov// |
* » Support Role | Metadata Contact |
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* » Date Effective From | 2023 |
Date Effective To | |
Position | Stakeholder Services Branch |
Email Address | tide.predictions@noaa.gov |
Phone | 301-713-2815 |
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Mobile | |
URL | |
Business Hours | |
Contact Instructions |
* » Support Role | Point of Contact |
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* » Date Effective From | 2023 |
Date Effective To | |
Position | Stakeholder Services Branch |
Email Address | tide.predictions@noaa.gov |
Phone | 301-713-2815 |
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Extents
Currentness Reference | Ground Condition |
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Extent Group 1
Extent Description |
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Extent Group 1 / Geographic Area 1
* » W° Bound | -123 |
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* » E° Bound | -74 |
* » N° Bound | 41 |
* » S° Bound | 27 |
* » Description |
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Extent Group 1 / Time Frame 1
* » Time Frame Type | Continuing |
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* » Start | 2004-11 |
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Spatial Information
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Grid Representation Used? | |
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Vector Representation Used? | Yes |
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Topology Level | Topology 1D |
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Reference Systems
Reference System
EPSG Code | EPSG:4269 | ||||||||||||||||||||||||||||
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EPSG Code | EPSG:4326 | ||||||||||||||||||||||||||||
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Access Information
Data License | |
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Data License URL | |
Data License Statement | |
* » Security Class | Unclassified |
* Security Classification System | |
Security Handling Description | |
• Data Access Policy | |
» Data Access Procedure | |
• » Data Access Constraints |
none |
• Data Use Constraints |
The air gap systems have been created by NOAA/NOS to provide the maritime community with improved information of bridge clearances. These real-time data are accurate to within +/- 1 inch. They are released for limited public use as preliminary data to be used only with appropriate caution when clearing the bridge. |
Metadata Access Constraints | |
Metadata Use Constraints |
Distribution Information
Start Date | 2019-05 |
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End Date | Present |
» Download URL | https://tidesandcurrents.noaa.gov/api-helper/url-generator.html |
Distributor | Center for Operational Oceanographic Products and Services (CO-OPS) (2023 - Present) |
File Name | |
Description |
This application builds a URL based off of inputted parameters that links to our various APIs. It can be used to make a link that returns data. Select one of the following to begin. |
File Date/Time | |
File Type (Deprecated) | |
Distribution Format | Not Applicable |
File Size | |
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Compression | |
Review Status |
Start Date | 2017 |
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End Date | Present |
» Download URL | https://tidesandcurrents.noaa.gov/map/ |
Distributor | Center for Operational Oceanographic Products and Services (CO-OPS) (2023 - Present) |
File Name | |
Description |
An interactive map with many features designed to provide a quick and easy way to find a Center for Operational Oceanographic Products and Services (CO-OPS) station, including Air Gap data. The map can be used to view and/or download data from real-time observations, historical observations, and predictions of tides and tidal currents, though air gap data is limited to viewing the values from yesterday and today, without download capability. |
File Date/Time | |
File Type (Deprecated) | |
Distribution Format | Not Applicable |
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Compression | |
Review Status |
Start Date | 2014 |
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End Date | Present |
» Download URL | https://api.tidesandcurrents.noaa.gov/api/prod/ |
Distributor | Center for Operational Oceanographic Products and Services (CO-OPS) (2023 - Present) |
File Name | |
Description |
Download present or historical air gap data, in CSV, JSON or XML format. |
File Date/Time | |
File Type (Deprecated) | |
Distribution Format | Not Applicable |
File Size | |
Application Version | |
Compression | |
Review Status |
Start Date | 2004 |
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End Date | Present |
» Download URL | https://tidesandcurrents.noaa.gov/ports_info.html |
Distributor | Center for Operational Oceanographic Products and Services (CO-OPS) (2023 - Present) |
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Description |
Viewable graphics on HTML pages. |
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Distribution Format | Not Applicable |
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Archive Information
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URLs
URL | https://tidesandcurrents.noaa.gov/ |
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Name | Home page for Tides and Currents |
URL Type | Online Resource |
File Resource Format | HTML |
Description |
CO-OPS main page |
URL | |
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Activity Log
Activity Time | 2023-11-21 |
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Activity Type | Record creation |
Responsible Party | Shawn Maddock |
Description |
Activity Time | 2023-11-30 |
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Activity Type | Finish building this record |
Responsible Party | Shawn Maddock |
Description |
Completed building this record |
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Technical Environment
Description |
Observed data are recorded and transmitted; then go through a quality control procedure and are loaded into a database. |
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Data Quality
Representativeness | |
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Accuracy |
The air gap systems have been created by NOAA/NOS to provide the maritime community with improved information of bridge clearances. These real-time data are accurate to within +/- 1 inch. They are released for limited public use as preliminary data, to be used only with appropriate caution when clearing the bridge. |
Analytical Accuracy | |
Horizontal Positional Accuracy | |
Vertical Positional Accuracy | |
Quantitation Limits | |
Bias | |
Comparability | |
Completeness Measure |
For CO-OPS to adhere to its goal of reliable operation of PORTS and dissemination of quality data, this requires no more than five (5) percent down time or malfunction of any of its systems. This dictates that PORTS be maintained rigorously by personnel with the required expertise. |
Precision | |
Analytical Precision | |
Field Precision | |
Sensitivity | |
Detection Limit | |
Completeness Report |
Raw data have not been subjected to the National Ocean Service's quality control or quality assurance procedures and do not meet the criteria and standards of official National Ocean Service data. They are released for limited public use as preliminary data to be used only with appropriate caution. |
Conceptual Consistency | |
» Quality Control Procedures Employed |
Data Management
» Have Resources for Management of these Data Been Identified? | |
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» Approximate Percentage of Budget for these Data Devoted to Data Management | |
» Do these Data Comply with the Data Access Directive? | |
» Is Access to the Data Limited Based on an Approved Waiver? | |
» If Distributor (Data Hosting Service) is Needed, Please Indicate | |
» Approximate Delay Between Data Collection and Dissemination | |
» If Delay is Longer than Latency of Automated Processing, Indicate Under What Authority Data Access is Delayed |
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» Actual or Planned Long-Term Data Archive Location | |
» If World Data Center or Other, Specify | |
» If To Be Determined, Unable to Archive, or No Archiving Intended, Explain |
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» Approximate Delay Between Data Collection and Archiving | |
» How Will the Data Be Protected from Accidental or Malicious Modification or Deletion Prior to Receipt by the Archive? |
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Lineage
» Lineage Statement |
Air gap observations are collected at a high frequency and updated for the public every six minutes to account for changes in water level, vehicular loads on the bridge, air temperature, and other factors. |
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Sources
Citation Title | Air Gap Data Source |
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Contact Role Type | Publisher |
Contact Type | Organization |
Contact Name | National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Center for Operational Oceanographic Products and Services (CO-OPS) |
Publish Date | |
Extent Type | Continuing |
Extent Start Date/Time | 2004-11 |
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Process Steps
Process Step Number | 1 |
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» Description |
downward-looking long-range microwave sensors for determining the instantaneous clearance or air gap below bridges that span navigable waterways in the U.S. |
Process Date/Time | 2004-11-01 00:00:00 |
Process Contact | Center for Operational Oceanographic Products and Services (CO-OPS) |
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Acquisition Information
Instruments
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FAQs
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Child Items
Rubric scores updated every 15m
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Related Items
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Catalog Details
Catalog Item ID | 71336 |
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Metadata Record Created By | Shawn Maddock |
Metadata Record Created | 2023-11-09 14:08+0000 |
Metadata Record Last Modified By | Shawn Maddock |
» Metadata Record Last Modified | 2024-01-18 15:49+0000 |
Metadata Record Published | 2024-01-18 |
Owner Org | CO-OPS |
Metadata Publication Status | Published Externally |
Do Not Publish? | N |
Metadata Workflow State | Published / External |
Metadata Last Review Date | 2024-01-18 |
Metadata Review Frequency | 2 Years |
Metadata Next Review Date | 2026-01-18 |
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