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Collocated QuikSCAT and Research Vessel Winds

Collocated QuikSCAT and Research Vessel Winds

General Description

High temporal resolution winds from automated weather systems are vector averaged, quality controlled, and collocated with QuikSCAT winds.

Anticipated Data

Tentative Research Vessels

Tentative Cruise Dates

Tentative Cruise Locations

Delay

Temporal Resolution

Data

R/V Atlantis

7/08 - 7/18

Oregon margin and
NE Pacific

4-6 weeks

1 min

Meta-data

Data

Graphics

7/17 - 8/18

Gulf of Alaska

8/23 - 9/7

NE Pacific

9/12 - 10/1

NE Pacific

10/4 - 10/9

Pacific Transit

11/10 - 12/28

Eastern Pacific

RSVAurora Australis

7/12 - 9/8

Southern Ocean

4-6 weeks

12 sec ?

Meta-data

Data

Graphics

10/2 - 11/12

Southern Ocean

R/V Knorr

Available but unscheduled

TBA

4-6 weeks

1 min

Meta-data

Data

Graphics

R/V Melville

7/7 - 8/2

N E Pacific

4-6 weeks

1 min
(20 min)

Meta-data

Data

Graphics

8/5 - 8/15

NE Pacific

7/7 - 8/2

NE Pacific

8/5 - 8/15

Off Sur Point

8/16 - 8/18

Transits

8/19 - 10/25

Transits and Eel River Basin

8/19 - 10/25

Transits and Eal River Basin

9/2 - 9/23

Off Oregon

10/1 - 10/20

Off Baja

10/29 - 11/22

Off Baja

11/23 - 1/30

Overhaul

R/V Meteor

4/10 - 5/16

Haifa to Malaga

4-6 weeks

1 min
(10 min)

Meta-data

Data

Graphics

5/19 - 6/8

Malaga to Lissabon

6/11 - 7/8

Lissabon - St. Johns

7/11 - 8/13

St. Johns to Reykjavik

8/15 - 9/2

Reykjavik to Hamburg

9/2 - 9/30

Hamburg to Bremen

R/V Oceanus

7/6 - 7/11

NW Atlantic

4-6 weeks

1 min

Meta-data

Data

Graphics

8/1 - 8/7

Georges Bank

8/11 - 8/20

NW Atlantic

8/25 - 9/3

Georges Bank

9/10 - 9/16

Georges Bank

9/20 - 10/6

Sargasso Sea

9/20 - 10/6

Gulf of ME

9/20 - 10/6

NY Bight

9/20 - 10/6

Transit near 36N

Polarstern

5/12 - 6/8

Capetown to Bremerhaven

4-6 weeks

1 min

Meta-data

Data

Graphics

6/23 - 8/15

Bremerhaven, Greenland Sea, Tromsoe

8/17 - 10/15

Tromsoe, Arctic Ocean, Bremerhaven

10/16 - 12/14

Dock

R/V Roger Revelle

6/24 - 7/17

Japan East Sea

4-6 weeks

1 min
(20 min)

Meta-data

Data

Graphics

7/22 - 8/9

Pacific Transits

8/12 - 8/30

Pacific Transits

9/3 - 9/29

Pacific Transits

10/4 - 10/7

Pacific Transits

10/9 - 10/22

Korea-Tsushima Str

10/24 - 10/30

Japan East Sea

10/31 - 12/23

Drydock

R/V Ron Brown

5/20 - 6/13

NE Pacific

4-6 weeks

1 min

Meta-data

Data

Graphics

R/V Thomas G. Thompson

6/17 - 7/14

Juan de Fuca

4-6 weeks

1 min

Meta-data

Data

Graphics

7/27 - 8/14

N California coast

8/15 - 8/20

NE Pacific

8/25 - 9/6

Juan de Fuca

9/7 - 9/16

Juan de Fuca

9/17 - 9/18

Juan de Fuca

9/19 - 9/23

Transit

9/24 - 10/3

H2O Observatory

10/4 - 10/8

Transit

10/10 - 10/29

Columbia River

11/12 - 11/14

Puget Sound

11/19 - 12/3

Transit

12/20 - 12/23

Transit and Puget Sound

 

Collocation Criteria

For each collocation, the ship and QuikSCAT observations are coincident within 25km and 30 minutes.

Delay and Quality Control

The delay is measured either from the time the ship returns to a port or transmission from the vessels. The cost and time required to transmit the data via satellite can be prohibitive, in which case the data are sent to us through mail or FTP. We are attempting to arrange more timely transmissions of lower time resolution data (times given in brackets). Sometimes these data sets are stored in formats well described as cryptic. We must convert the data files to a usable form. The data then passes through a two level quality control process. The first level is automated, designed to catch physical impossibilities and flag unlikely values. The second stage is a visual examination, designed to spot systematic errors and evaluate the data flagged as questionable. A paper detailing this quality control, and demonstrating its value, is in review.

Averaging of Research Vessel Observations

The temporal resolution of the wind records range from 12 seconds to ten minutes. When possible these are averaged for a period preceding the QuikSCAT observation. Furthermore, in many cases, the observations that went into the records we receive are averages. When known, these averaging techniques will also be described.

Data Set Content

The data sets will be restricted to the closest collocation in space within 30 minutes of the satellite observation. The data sets will contain scatterometer wind speed and direction, cell location information, ship winds adjusted to equivalent neutral 10 m winds, the original true winds (i.e., earth relative, with directions referenced to true North) calculated from the ship observations, and the data used in the conversion to equivalent neutral winds.

Data Format

Detailed descriptions of the data content and format, units, and variable declarations for each data file.

Meta-Data

Key information such as the height of the instruments.

Read Programs

The collocated data files are stored in an ASCII format.


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Last Updated 16 September, 1998