NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Diurnal and Semidiurnal Variations in Earth RotationDuring the last decade there has been an unprecedented improvement in both the accuracy, the temporal resolution of Earth's rotation measurements. Determination of the position of the Earth's rotation axis both in inertial space and with respect to the crust with accuracies of about 0.3 milliarcseconds (mas) are now routine. In recent years, there has been and emphasis on the determination of short-period (daily and less) variations in Earth rotation. Two space based geodetic systems, very long baseline interferometry (VLBI) and the global positioning system (GPS) have proved to be very successful in this endeavor. Results for the tidally coherent part of the subdaily Earth rotation variations determined from the analysis of VLBI data are discussed. The magnitude of other subdaily variations are also considered.
Document ID
19970007770
Acquisition Source
Headquarters
Document Type
Reprint (Version printed in journal)
Authors
Herring, T.
(Massachusetts Inst. of Tech. Cambridge, MA United States)
Date Acquired
August 17, 2013
Publication Date
January 1, 1993
Publication Information
Publication: Advanced Space Research
Publisher: COSPAR
Volume: 13
Issue: 11
ISSN: 0273-1177
Subject Category
Geophysics
Report/Patent Number
NAS 1.26:203017
NASA-CR-203017
Accession Number
97N70612
Funding Number(s)
CONTRACT_GRANT: NOAA-NA90-AA-DAC-481
CONTRACT_GRANT: NSF EAR-89-05560
CONTRACT_GRANT: NAGw-3007
Distribution Limits
Public
Copyright
Public Use Permitted.
Document Inquiry

Available Downloads

There are no available downloads for this record.
No Preview Available