MIRAI MR98-K01 Bathymetry (MBES)

Last Modified: 2013-01-26
: MR98-K01
: Processed (DMO)-Basic
: JAMSTEC
: Depth
:
OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > BATHYMETRY
SOLID EARTH > GEOMOROHOLOGY

For Using Data

Data Management Office
See Terms and Conditions about constrain of use.
See Terms and Conditions about data citation.
Instrument:
Multi-narrow beam echo sounder ( - MR12-E01)
 The data provided here are the bathymetric data obtained from the multibeam echo sounder system (MBES). The system transmits the shape echo sounder beam from the transmitter and receives the beam reflected from the seabed using the hydrophone. The water depth is calculated from the travel time of the beam between the transmitter and the receiver. Having many transmitters make fan beams across the keel, this system can obtain a lot of bathymetric data on a wide angle at once.
 The travel time of the beam (from the transmitter to the seabed and from the seabed to the receiver) is corrected using the vertical profile of the sound velocity obtained from the in situ observations. (see section Sound velocity profile correction). The raw data with the low reliability such as the noise are removed using the software (see section Processed data).
Manufacturer: SEABEAM INSTRUMENTS
Type : SEABEAM 2112.004
Frequency : 12kHz
Swath angle: Max 150°
Beam angle: 2 * 2°
Beam number: 151
Range: 50m - 11,000m
Resolution (Depth) : Center beam [Depth (m) * 0.2%], Side beam [Depth (m) * 0.5%]
 In the survey area, the sound velocity profile correction is made using the XBT data acquired during the cruise. On the other hand, in the transit area, e.g., from the survey area to the port, where we do not conduct the XBT observations, the data are corrected using the historical XBT data or the Argo float data.
 Following raw data with the low reliability are removed using the processing software "HIPS and SIPS" of CARIS Inc:
· Navigation error data.
· Data more than manufacturer specification (see section Measurement System)
· Spike noise data (If both of slopes calculated from the evaluated beam and prior/post one on the same swath are less than 5 degrees.)
· Side beam (Beam No.1-21,131-151 : Starboard is No.1 beam.)
 The data quality is different in the survey and transit area because of the difference of the temperature data for the sound velocity profile correction. Therefore, we open the survey and transit area data separately. The rule of the file name is as follows.

File name :
· Survey area data : YYYYMMDD.dat
· Transit area data : TYYYYMMDD.dat
YYYY: year, MM: month, DD: day
"T" of the header indicates the transit area data.

(1) Geodetic system: WGS84
(2) The tide is not corrected.
(3) These data are compressed in zip format, please use that after unpacking.
(4) If you would like the raw data set, please contact us from "Contact Us" above.
: MR98-K01
: Processed (DMO)-Basic
: JAMSTEC
: Depth
:
OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > BATHYMETRY
SOLID EARTH > GEOMOROHOLOGY

Observation Map

Imagery reproduced from ...

Data List

File names
19981030.zip
19981102.zip
19981103.zip
19981104.zip
19981107.zip
19981109.zip
19981110.zip
19981111.zip
19981112.zip
19981113.zip
19981114.zip
19981115.zip
19981116.zip
19981117.zip
19981118.zip
19981119.zip
19981120.zip
19981121.zip
19981124.zip
19981125.zip
19981126.zip
19981127.zip
19981128.zip
19981129.zip
19981130.zip
19981201.zip
19981202.zip
19981203.zip
19981204.zip
19981205.zip
19981206.zip
19981207.zip
19981208.zip
19981209.zip
19981213.zip
19981214.zip
19981215.zip
: MR98-K01
: Processed (DMO)-Basic
: JAMSTEC

Bathymetry XYZ

The one record length of the Processed Data file is 33 bytes.
No. Column Description Format Unit Remarks
1 1 - 11 Longitude f11.6 degree + : Eastern hemisphere
- : Western hemisphere
2 13 - 22 Latitude f10.6 degree + : Northern hemisphere
- : Southern hemisphere
3 24 - 31 Depth f9.3 m
4 32 - 33 Terminator a2
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Related Information

Update History

2013-01-26
An observation data was registerd.