Core Angular Momentum Change Data: Excess length of day in milliseconds over standard day of 86400 seconds - Jackson et al. data
Entry ID: IERS_GGFC_SBC_CAM_LOD_JACKSON

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Summary
Abstract: [Adapted from http://www.astro.oma.be/SBC/data1.html]

Core angular momentum (CAM) is estimated by Jackson et al. using
modelling hypotheses applied to magnetic data. CAM is then
transformed into change in the length of day (LOD). Data is expressed
as excess length of day in milliseconds over a standard day of 86400
seconds.

Modelling hypotheses:
The zonal toroidal t_1^0 and t_3^0 ... View entire text
Related URL
Description: Excess length of day in milliseconds over standard day of 86400
seconds data in ASCII format

Description: IERS GGFC Special Bureau for the Core home page.
Data Set Citation
Dataset Originator/Creator: Jackson, A., J. Bloxham and D. Gubbins
Dataset Title: Data of Core Angular Momentum Changes
Dataset Publisher: Special Bureau for the Core, GGFC, IERS
Data Presentation Form: Table
Online Resource: http://www.astro.oma.be/SBC/data1.html
Parent DIF
This data set description is a member of a collection. The collection is described in
IERS_GGFC_SBC_CAM_LOD

Temporal Coverage
Start Date: 1840-01-01
Stop Date: 1990-12-31
Location Keywords
Data Resolution
Temporal Resolution: 1 year
ISO Topic Category
Access Constraints No constraints
Use Constraints Please cite data provider.

Reference to be mentioned when data are used:
Jackson A., 1997. Time-Depency of geostrophic core surface
motions, Phys. Earth Planet. Int., 103, pp 293-311.
Data Set Progress
COMPLETE
Data Center
Global Geophysical Fluids Center, International Earth Rotation Service Supplemental Info
Data Center URL: http://bowie.gsfc.nasa.gov/ggfc/

Data Center Personnel
Name: BENJAMIN F. CHAO
Email: chao at bowie.gsfc.nasa.gov
Contact Address:
Space Geodesy Branch, Code 926
NASA's Goddard Space Flight Center (GSFC)
City: Greenbelt
Province or State: Maryland
Postal Code: 20771
Country: USA
Distribution
Distribution Media: Online (HTTP)
Distribution Format: ASCII
Fees: None
Personnel
Role: DIF AUTHOR
Email: gsfc-gcmduso at mail.nasa.gov
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Publications/References
Reference to be mentioned when data are used: Jackson A., 1997. Time-Depency of geostrophic core surface motions, Phys. Earth Planet. Int., 103, pp 293-311.

Related reference:
Bloxham J. & Jackson A., 1992. Time-dependent mapping of the magnetic field at the core-mantle boundary, J. Geophys. Res., 97, pp 19537-19563.
Creation and Review Dates
DIF Creation Date: 2003-10-16
Last DIF Revision Date: 2003-10-17
Future DIF Review Date: 2004-10-16
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