MIRAI MR17-05C Shipboard Acoustic Doppler Current Profiler (ADCP)

Last Modified: 2018-04-21
: MR17-05C
: Processed (DMO)-Corrected
: JAMSTEC
: Depth, Absolute velocity (zonal, meridional and vertical)
:
OCEANS > OCEAN CIRCULATION > OCEAN CURRENTS

For Using Data

Data Management Office
See Terms and Conditions about constrain of use.
See Terms and Conditions about data citation.
Instrument:
Shipboard acoustic doppler current profiler (ADCP) (MR08-02 - )
Acoustic Doppler Current Profiler (ADCP) transmits acoustic pulses from a transducer assembly. The transducers receive backscattered sounds from small particles floating with water currents. Using the Doppler shift principle, the backscattered sound data can be converted into components of water current velocity at multiple depths. The shipboard ADCP mounted on R/V MIRAI can measure the speed and direction of water currents for up to 128 layers. The dataset provided here is a 5-minute time average of absolute velocity data (i.e., water current velocity in geophysical coordinates) after various kinds of corrections. This data processing was carried out by DMO. See here for detailed correction methods.
Manufacturer: Teledyne RD Instruments
System: OS-ADCP 75kHz
Frequency: 76.8kHz
Configuration: 4-beam phased array
Beam angle: 30deg
Transducer Depth: 6.5m beneath calm water line
ADCP data logger: Teledyne RD Instruments VmDas 1.46.5
Ship heading
[instrument maker/model]:
iXBlue/PHINS
Navigation
[instrument maker/model]:
Fugro/StarPack-D
Configuration 1
Bottom track mode
2017/08/24 00:10 - 2017/08/24 02:44
2017/08/25 02:56 - 2017/08/25 08:10
2017/08/25 08:11 - 2017/08/25 20:11
Water track mode
2017/08/24 17:41 - 2017/08/25 02:55
Depth range: 23 m - 815 m (bin centers)
Bin length: 8 m
Number of bins: 100
Blanking interval: 8 m

Configuration 2
Bottom track mode
2017/08/26 03:19 - 2017/08/26 04:49
2017/08/26 04:50 - 2017/08/26 22:10
2017/08/26 22:57 - 2017/08/27 00:36
2017/08/27 01:57 - 2017/08/27 14:53
2017/08/28 13:04 - 2017/08/28 15:24
2017/08/29 10:37 - 2017/08/30 00:12
2017/08/30 00:16 - 2017/08/31 13:53
2017/09/17 16:27 - 2017/09/19 15:36
2017/09/20 02:15 - 2017/09/22 16:30
Depth range: 17 m - 119 m (bin centers)
Bin length: 6 m
Number of bins: 18
Blanking interval: 4 m

Configuration 3
Bottom track mode
2017/09/01 01:45 - 2017/09/02 02:51
2017/09/03 22:34 - 2017/09/06 08:19
2017/09/06 08:19 - 2017/09/06 14:35
2017/09/06 14:35 - 2017/09/06 16:33
2017/09/06 16:33 - 2017/09/07 02:45
2017/09/07 22:20 - 2017/09/08 04:18
2017/09/08 07:16 - 2017/09/08 13:15
2017/09/09 14:08 - 2017/09/11 02:52
2017/09/11 08:14 - 2017/09/12 00:11
2017/09/12 03:16 - 2017/09/14 02:57
2017/09/14 19:02 - 2017/09/17 16:26
2017/09/24 20:29 - 2017/09/24 21:39
2017/09/30 00:06 - 2017/09/30 00:08
2017/09/30 00:09 - 2017/10/01 00:00
Water track mode
2017/09/02 02:51 - 2017/09/03 22:34
2017/09/07 02:46 - 2017/09/07 22:19
2017/09/08 04:19 - 2017/09/08 07:16
2017/09/08 13:15 - 2017/09/09 14:08
2017/09/11 02:52 - 2017/09/11 08:13
2017/09/12 00:12 - 2017/09/12 03:15
2017/09/14 02:57 - 2017/09/14 19:02
2017/09/23 03:42 - 2017/09/23 07:11
2017/09/23 07:12 - 2017/09/24 20:29
2017/09/24 21:40 - 2017/09/24 21:50
2017/09/24 21:51 - 2017/09/30 00:05
Depth range: 19 m - 811 m (bin centers)
Bin length: 8 m
Number of bins: 100
Blanking interval: 4 m

Sound speed calculation: used transducer temperature during acquisition
Correction of the alignment error
[corrected angle]:
-0.193 deg
If you would like the raw data set, please contact us from "Contact Us" above.
In this cruise, we processed only the data which collected using configuration 1 - 3 above. About the periods except it, we have no plan to process the data. If you need the raw data of non-processed periods, please contact us "Contact Us" above.
: MR17-05C
: Processed (DMO)-Corrected
: JAMSTEC
: Depth, Absolute velocity (zonal, meridional and vertical)
:
OCEANS > OCEAN CIRCULATION > OCEAN CURRENTS

Observation Map

Imagery reproduced from ...

Figures

Data List

  File names
MR17-05C.txt
: MR17-05C
: Processed (DMO)-Corrected
: JAMSTEC

ADCP Corrected,Qced 3

About data format
We provide the dataset as AWI Ocean Data View format (generic spreadsheet format).
Ocean Data View : http://odv.awi.de/
Japanese Guide : http://www.jodc.go.jp/jodc_pub/digitalpub_j.html
Format Description (tab space separated)
Data No. Content Unit Format Remarks
1 CruiseID
i6 Cruise name
2 Station
i12 Station name set to be measurement time
[YYYYMMDDhhmm]
3 Type
i1 Always "B", due to the number of data acquisition layers lower than 250-layer
4 Day
i10 Measurement day(UTC)
[MM/DD/YYYY]
5 Time
i5 Measurement time [Center of average time](UTC)
[ hh:mm]
6 Longitude degree f8.4 Position at the measurement time
[0 - 360]
7 Latitude degree f8.4 Position at the measurement time
[North: +, South: -]
8 Bottom depth m f6.1 Set to be "0" if there is no data
9 Measurement depth m f7.2 Depth of measurement layer
10 Quality flag
i1 "0"=good, "4"=questionable, "8"=bad
11 Current speed (zonal) m/sec f8.4 5-minute average of zonal component of absolute velocity
[Eastward: +]
[Only good data of more than 120 count of ping correlation and more than 25 count of echo intensity were used for the average]
12 Quality flag
i1 "0"=good, "4"=questionable, "8"=bad
13 Current speed (meridional) m/sec f8.4 5-minute average of meridional component of absolute velocity
[Northward: +]
[Only good data of more than 120 count of ping correlation and more than 25 count of echo intensity were used for the average]
14 Quality flag
i1 "0"=good, "4"=questionable, "8"=bad
15 Current speed (vertical) m/sec f8.4 5-minute average of vertical component of absolute velocity
[Upward: +]
[Only good data of more than 120 count of ping correlation and more than 25 count of echo intensity were used for the average]
16 Quality flag
i1 "0"=good, "4"=questionable, "8"=bad
17 Speed of absolute velocity m/sec f7.4 Magnitude of absolute velocity
18 Quality flag
i1 "0"=good, "4"=questionable, "8"=bad
19 Current direction degree f5.1 Current direction of absolute velocity
[0 to 360]
20 Quality flag
i1 "0"=good, "4"=questionable, "8"=bad
21 Error velocity m/sec f8.4 5-minute average of error velocity
22 Quality flag
i1 "0"=good, "4"=questionable, "8"=bad
23 Correlation count f5.1 5-minute average by 4-beam average correlation(send beam - received beam)
[max:250count]
[The data used to calculate velocity were used to average]
24 Quality flag
i1 "0"=good, "4"=questionable, "8"=bad
25 Echo Intensity count f5.1 5-minute average by 4-beam average echo intensity
[max:120count]
[The data used to calculate velocity were used to average]
26 Quality flag
i1 "0"=good, "4"=questionable, "8"=bad
27 Percentgood % f5.1 Rate of the good data that is used velocity calculation to the all data
[0 to 100]
28 Quality flag
i1 "0"=good, "4"=questionable, "8"=bad
29 Ship's speed m/sec f7.4 Ship's speed by GPS
30 Quality flag
i1 "0"=good, "4"=questionable, "8"=bad
*31 Standard deviation of the Ship's Speed m/sec f5.2 Standard deviation of the Ship's Speed in the 5-minute
32 Quality flag
i1 "0"=good, "4"=questionable, "8"=bad
*33 Standard deviation of the Ship's Heading degree f6.2 Standard deviation of the Ship's Heading in the 5-minute
34 Quality flag
i1 "0"=good, "4"=questionable, "8"=bad
*35 Standard deviation of the Ship's Roll degree f5.2 Standard deviation of the Ship's Roll in the 5-minute
36 Quality flag
i1 "0"=good, "4"=questionable, "8"=bad
*37 Standard deviation of the ship's pitch degree f5.2 Standard deviation of the ship's pitch in the 5-minute
38 Quality flag
i1 "0"=good, "4"=questionable, "8"=bad
* Standard deviations of the ship's speed and the ship's heading, roll, and pitch in each 5-minute avarage section are also included in the dataset, since data quality of ADCP velocity might be dropped due to the high variablities of each variables. However, DMO doesn't make any evaluation for the ADCP data by them.

Related Information

Update History

2018-04-21
An observation data was registerd.