Ocean Sciences|Data|Search Current Meters

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Current Meter Data Inventory

Use this form to search the IOS/Ocean Sciences Data Inventory for data from current meters in your study area. This application will search our on-line INVENTORY of Rotor Current Meter (RCM) data, Acoustic Doppler Current Meter (ADCP) and S4 current meter data and return information about the data records that meet the search criteria but WILL NOT return the actual data. At the present time, the current meter data is not available on-line to external users.

Internal users may use this application to generate list of profiles that are accessible by the DFO local and wide area networks to authorized users.
External users are welcome to search the inventory. If you find data that are of interest , have questions about the data or encounter problems with the application please contact the Senior analyst at IOS.

Search Tips

STEP 1: SELECT the AREA of Interest:
Option 1a - Enter the Coordinates of your Search Area below
input format is DDD MM.M H (e.g. 123 37.5 W)
Users may alter any part of the default values. The latitude and longitude range you select will be preserved for your session. If you return here to revise your search, REFRESH this page (using your web browser) to see you most recent selection criteria.


		North Latitude
	Longitude		Longitude
West				East

		South Latitude

Option 1b - Select from our list of NAMED AREAS:

Select NAMED GEOGRAPHIC AREAS code from the box: ==>

STEP 2: Select the DATE RANGE for which you would like data:

from:

(yyyy/mm/dd)

/ / to / /

STEP 3: Select PARAMETERS which MUST BE included in each profile:if none are selected, ALL records with ANY parameters are returned.

depth/press

temperature

salinity

transmiss.

oxygen

currents

air pressure

waves

wind

STEP 4: Select Specific DATA CATEGORIES: Select any data categories that must be included - if no categories are selected, ALL categories are returned.

Rotor Current Meters

ADCP

STEP 5: Select the preferred RESULTS format:

Summary Table - Comma-separated value (CSV) summary containing: Cruise, Station name, Project, Scientist, Time/Date, Latitude, Longitude, Filename etc. Select the output, then CUT and PASTE this into a text file. The resulting text file can then be imported into EXCEL (or application of your choice), skipping over the "header" lines.

List of File Names (with path) for all files that meet your search criteria. Select the output, then CUT and PASTE this into a text file. The resulting file can be used as input to IOSSHELL programs. Internal IOS Users should enter the appropriate drive letter designator for the DATA_LIB (don't worry if you didn't understand that last part!)
Enter the drive letter designator for the DATA_LIBRARY:

STEP 6: [Optional] - Enter a short description of your search.

STEP 7: No more questions-just press SUBMIT to GO!

Note: all results are return in order of DATE/TIME of data collection, from oldest to most recent.

For further information about the RESULTS...
If you encounter ERRORS...

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Search Tips

The current version uses SESSION VARIABLES to store the Latitude and Longitude information, so that a user can run a query, see the results, then return to the input form page (using the browser's BACK button) and be presented with the previous latitude and longitude selection. The Date Range Selection information is preserved, but the settings for the RADIO BUTTONS and CHECK BOXES are reset to default values each time.
As a result of the use of SESSION VARIABLES, users will retain their latitude and longitude settings for a SESSION, but the values will be reset to default values when the web server detects a new session, even if it is from the same user. The definition of a 'session' (and the length of time that the user specifications 'persist' can be set in the application. No specific time period is set in this application, so it will default to 20 minutes. This means that if you return to the input page within 20 minutes of having submitted a query, your previous latitude and longitude selections should be presented to you. It may be necessary to 'REFRESH' the input page using the web browser's 'REFRESH' button.

Acoustic Doppler Current Meter

ADCP instruments are capable of storing up to 128 depth bins of velocity data, each having a U and V component, and are labelled in the data file as NortV1, EastVI; NortV2, EastV2; etc…. There are also parameters associated with the instrument itself (such as temperature, pitch, roll, heading) in addition to the date/time data that contribute to the size of the dataset. The number of channels are identified in the *FILE : NUMBER OF CHANNELS section of the header and values exceeding 100 are typical of these deployments.

IOS Shell was not designed to accommodate more than 40 channels in the data file. As the ADCP files typically have more than 40 channels it is first necessary to remove the ADCP depth channels that are not relevant to the analysis. This is accomplished by applying the REMOVE CHANNELS program in the Process -> General Data Processing section of IOS Shell. Rather than removing many channels the user can select the ‘specified channels are to be kept’ option (second form) and identify which channels to keep (all others will be removed).

Having been converted to a data file with less than 40 channels the entire suite of IOS Shell programs is available to analyse, summarize, and plot the ADCP data.

The IOS header format convention provides metadata information for each ADCP deployment such as:

*FILE
START TIME : UTC 2005/10/02 01:20:00.000
END TIME : UTC 2006/05/31 14:00:00.000
TIME INCREMENT : 0 0 20 0 0 ! (day hr min sec ms)
TIME UNITS : Minutes
NUMBER OF RECORDS : 17391
DATA DESCRIPTION : ADCP
FILE TYPE : ASCII
DATA TYPE : REAL*8
NUMBER OF CHANNELS : 104

*ADMINISTRATION
AGENCY : IOS
COUNTRY : Canada
PROJECT : Victoria Sill
SCIENTIST : T. Juhasz
PLATFORM : CCGS J P Tully

*LOCATION
GEOGRAPHIC AREA : Constance Bank
STATION : AS04-E
LATITUDE : 49 17.96700 N ! (deg min)
LONGITUDE : 123 22.55100 W ! (deg min)
WATER DEPTH : 116

*DEPLOYMENT
MISSION : 2005-23
TYPE : sub-surface
TIME ANCHOR DROPPED : UTC 2005/10/01 23:51:00.000
$REMARKS
3 wheels, 2120lbs.

*INSTRUMENT
TYPE : ADCP
MODEL : wh-adcp
SERIAL NUMBER : 2940
DEPTH : 110