Data Access Form

Dataset Title:	RV Sikuliaq : Flowmeter Krohne_1464 : Water Flow Rate : 600 s binned
Institution:	UAF (Dataset ID: waterflowrate_lperminute_flowme021464_600sbin)
Information:	Summary \| License \| Metadata \| Background \| Make a graph

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Variable	Optional Constraint #1		Optional Constraint #2		Minimum	Maximum
time (UTC)
spot_time (UTC)
spot_value (l/minute)
mean (Water Flow Rate Mean, l/minute)
stddev (l/minute)
minimum (l/minute)
maximum (l/minute)
median (l/minute)
num_values (unitless)

Server-side Functions

distinct()

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  time {
    String _CoordinateAxisType "Time";
    String axis "T";
    String ioos_category "Time";
    String long_name "Time";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  spot_time {
    String ioos_category "Time";
    String long_name "Spot Time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  spot_value {
    String ioos_category "Statistics";
    String long_name "Water Flow Rate Spot_Value";
    String short_name "water_flow_rate_spot_value";
    String special_notes "Binning type: linear";
    String standard_name "x_spot_value";
    String units "l/minute";
  }
  mean {
    String ioos_category "Statistics";
    String long_name "Water Flow Rate Mean";
    String short_name "water_flow_rate_mean";
    String special_notes "Binning type: linear";
    String standard_name "x_mean";
    String units "l/minute";
  }
  stddev {
    String ioos_category "Statistics";
    String long_name "Water Flow Rate Stddev";
    String short_name "water_flow_rate_stddev";
    String special_notes "Binning type: linear";
    String standard_name "x_stddev";
    String units "l/minute";
  }
  minimum {
    String ioos_category "Statistics";
    String long_name "Water Flow Rate Minimum";
    String short_name "water_flow_rate_minimum";
    String special_notes "Binning type: linear";
    String standard_name "x_minimum";
    String units "l/minute";
  }
  maximum {
    String ioos_category "Statistics";
    String long_name "Water Flow Rate Maximum";
    String short_name "water_flow_rate_maximum";
    String special_notes "Binning type: linear";
    String standard_name "x_maximum";
    String units "l/minute";
  }
  median {
    String ioos_category "Statistics";
    String long_name "Water Flow Rate Median";
    String short_name "water_flow_rate_median";
    String special_notes "Binning type: linear";
    String standard_name "x_median";
    String units "l/minute";
  }
  num_values {
    String ioos_category "Statistics";
    String long_name "Water Flow Rate Num_Values";
    String short_name "water_flow_rate_num_values";
    String special_notes "Binning type: linear";
    String standard_name "x_num_values";
    String units "unitless";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Other";
    String contributor_name "RV Sikuliaq";
    String contributor_role "Data collector";
    String creator_name "CORIOLIX, RDESC, RCRV Project, Oregon State University";
    String creator_url "http://ceoas.oregonstate.edu";
    String history 
"2026-05-02T14:10:47Z (source database)
2026-05-02T14:10:47Z https://coriolix.sikuliaq.alaska.edu/erddap/tabledap/waterflowrate_lperminute_flowme021464_600sbin.html";
    String infoUrl "https://www.uaf.edu/cfos/sikuliaq/";
    String institution "UAF";
    String keywords "atmosphere, data, observations, ocean";
    String license 
"The data may be used and redistributed for free but is not intended
for legal use, since it may contain inaccuracies. Neither the data
Contributor, ERD, NOAA, nor the United States Government, nor any
of their employees or contractors, makes any warranty, express or
implied, including warranties of merchantability and fitness for a
particular purpose, or assumes any legal liability for the accuracy,
completeness, or usefulness, of this information.";
    String sourceUrl "(source database)";
    String standard_name_vocabulary "CF standard name";
    String summary 
"Water Flow Rate 600 s binned time series data.
Vessel: RV Sikuliaq. Sensor Model: Krohne Optiflux 5000 flow sensor
Sensor S/N: A13021464
Sensor Location Onboard: Wet Lab
Sensor Description: Electromagnetic Flowmeter measuring surface seawater flow being delivered to underway instruments. These electromagnetic flowmeters are designed exclusively to measure the flow and conductivity of electrically conductive, liquid media.

  The interface to this instrument is via Modbus RTU over RS485. Custom software had to be written to extract the required data from the sensor. The logged data format is
unique to Sikuliaq.
Parameter Description: The flow rate of water, used for diagnostic purposes.";
    String title "RV Sikuliaq : Flowmeter Krohne_1464 : Water Flow Rate : 600 s binned";
  }
}

Using tabledap to Request Data and Graphs from Tabular Datasets

tabledap lets you request a data subset, a graph, or a map from a tabular dataset (for example, buoy data), via a specially formed URL. tabledap uses the OPeNDAP (external link)

Data Access Protocol (DAP) (external link)

and its selection constraints (external link)

The URL specifies what you want: the dataset, a description of the graph or the subset of the data, and the file type for the response.

(easy) You can get data by using the dataset's Data Access Form or Subset form. They make the URL for you.
(easy) You can make a graph or map by using the dataset's Make A Graph form. It makes the URL for you.
(not hard) You can bypass the forms and get the data or make a graph or map by generating the URL by hand or with a computer program or script.

Tabledap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/pmelTaoDySst.htmlTable?longitude,latitude,time,station,wmo_platform_code,T_25&time>=2015-05-23T12:00:00Z&time<=2015-05-31T12:00:00Z
Thus, the query is often a comma-separated list of desired variable names, followed by a collection of constraints (e.g., variable<value), each preceded by '&' (which is interpreted as "AND").

For details, see the tabledap Documentation.

ERDDAP, Version 2.23
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