TELLUS DEGREE 2 SPHERICAL HARMONIC COEFFICIENTS

TELLUS DEGREE 2 SPHERICAL HARMONIC COEFFICIENTS
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DOINot Registered
Short NameTELLUS_2_DEG_COEF
DescriptionThis dataset contains the degree 2 spherical harmonic coefficients (2,0), (2,1), (2,2) vs time. These estimates are obtained from the analysis of Satellite Laser Ranging (SLR) data to five geodetic satellites: LAGEOS-1 and 2, Starlette, Stella and Ajisai. The background gravity model used in the SLR analysis is consistent with GRACE Release-04 or Release-05 processing, including the use of the same Atmosphere-Ocean De-aliasing (AOD) dataset as the corresponding GRACE release. However, the monthly mean of the AOD model (included in the file) has been restored, so that the coefficients represent the full month's signal. For the same reason, no rate models have been applied. These data are housed at the Center for Space Research at University of Texas Austin. For more information, please visit: http://grace.jpl.nasa.gov/data/get-data/oblateness/.
Version1
Dataset TypeREMOTE
MeasurementSolid Earth > Geodetics/Gravity > Gravity
Processing Level2
CoverageRegion: Global
Northernmost Latitude: degrees
Southernmost Latitude: degrees
Westernmost Longitude: degrees
Easternmost Longitude: degrees
Time Span: 2002-Jan-15 to Present
ResolutionSpatial Resolution: 500 km (Along) x 500 km (Across)
ProjectionType: Spherical
Detail:
Ellipsoid: WGS84
Latency hours
Swath Width- km
Sample Frequency-
Temporal Repeat (Nominal)1 Month
Temporal Repeat (Min)-
Temporal Repeat (Max)-
Platform/Sensor
GRACE
Platform
Name: Gravity Recovery and Climate Experiment (GRACE)
Orbit Period: -1 minutes
Inclination Angle: 89 degrees
Ascending Node: 1970-Jan-01 00:00:00
/
GRACE ACC
SENSOR
Name: GRACE SuperSTAR Accelerometer (GRACE ACC)
Swath Width: - km
Description: The accelerometer, located at the center of mass of each satellite, measures all non-gravitational forces acting on each satellite. These forces include air drag, solar radiation pressure, and attitude control activator operation.

GRACE
Platform
Name: Gravity Recovery and Climate Experiment (GRACE)
Orbit Period: -1 minutes
Inclination Angle: 89 degrees
Ascending Node: 1970-Jan-01 00:00:00
/
GRACE SCA
SENSOR
Name: Star Camera Assembly (GRACE SCA)
Swath Width: - km
Description: The two star cameras mounted close to the accelerometer on each satellite provide the precise attitude references for the satellites when making science measurements.

GRACE
Platform
Name: Gravity Recovery and Climate Experiment (GRACE)
Orbit Period: -1 minutes
Inclination Angle: 89 degrees
Ascending Node: 1970-Jan-01 00:00:00
/
GRACE KBR
SENSOR
Name: K-Band Ranging System (GRACE KBR)
Swath Width: - km
Description: This instrument precisely measures the changes in the separation between the two GRACE satellites using phase tracking of K- and Ka-band signals sent between the two satellites

ProjectMaking Earth Science Data Records for Use in Research Environments (MEaSUREs)
Data ProviderCreator: M. Cheng, B. Tapley
Release Place: CSR
Release Date: 2010-Aug-01
Resource: http://grace.jpl.nasa.gov/data/get-data/oblateness/
Keyword(s)gravity
Persistent IDPODAAC-TE2DE-COE01
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
Direct Access
REMOTE-FTPftp://ftp.csr.utexas.edu/pub/slr/degree_2/
Format (Compression)ASCII (NONE)
Citation M. Cheng, B. Tapley. 2010. TELLUS DEGREE 2 SPHERICAL HARMONIC COEFFICIENTS. Ver. 1. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD].

For more information see Data Citations and Acknowledgments.

Journal Reference Cheng, M.K., Tapley, B.D., Variations in the Earths oblateness during the past 28 years, J. Geophys. Res., 109(B09402), 2004