TELLUS DEGREE 1 SPHERICAL HARMONIC COEFFICIENTS

TELLUS DEGREE 1 SPHERICAL HARMONIC COEFFICIENTS
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DOI10.5067/TE1DE-COE01
Short NameTELLUS_1_DEG_COEF
DescriptionThis dataset contains the spherical harmonic coefficients C(1,0), C(1,1), S(1,1) vs time. The degree 1 gravity coefficients were derived based on ocean and atmospheric models and GRACE coefficients for degrees 2 and higher (Swenson et al. 2008, Sun et al., 2016). The coefficients in this dataset represent the non-atmospheric land component of the degree 1 gravity coefficients, normalized using the GRACE and GRACE-FO standards. For land applications use, apply these coefficients with the GRACE / GRACE-FO GSM coefficients for degrees 2 and higher.. For ocean applications, add the degree 1 values found in the ocean bottom pressure dataset (GAD) to the degree 1 coefficients provided here. If you are interested in adding the full ocean, land and atmosphere coefficients, add the degree 1 values of the atmosphere/ocean dataset (GAC) to these values. Data format is similar to that for GSM, GAD and GAC files distributed by PO.DAAC. For more information, please visit: https://grace.jpl.nasa.gov/data/get-data/geocenter/.
Version1
Dataset TypeOPEN
MeasurementSOLID EARTH > GRAVITY/GRAVITATIONAL FIELD > GRAVITY
Processing Level2
CoverageRegion: Global
Northernmost Latitude: 89 degrees
Southernmost Latitude: -89 degrees
Westernmost Longitude: -180 degrees
Easternmost Longitude: 180 degrees
Time Span: 2002-Aug-01 to Present
ResolutionSpatial Resolution: 0 km (Along) x 0 km (Across)
ProjectionType:
Detail:
Ellipsoid: WGS 84
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 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: GRACE K-Band Ranging System (GRACE KBR)
Swath Width: -1 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

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: -1 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.

ProjectMaking Earth Science Data Records for Use in Research Environments (MEaSUREs)
Data ProviderCreator: Felix Landerer
Release Place: JPL
Release Date: 2019-Jun-25
Resource: http://grace.jpl.nasa.gov/data/get-data/geocenter/
Keyword(s)gravity, TN-13, TELLUS, JPL, CSR, GFZ
Persistent IDPODAAC-TE1DE-COE01
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
Citation Felix Landerer. 2019. TELLUS DEGREE 1 SPHERICAL HARMONIC COEFFICIENTS. Ver. 1. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/TE1DE-COE01.

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For more information see Data Citations and Acknowledgments.

Journal Reference 1. Sun, Y., R. Riva, and P. Ditmar (2016), Optimizing estimates of annual variations and trends in geocenter motion and J2 from a combination of GRACE data and geophysical models, J. Geophys. Res. Solid Earth, 121, doi:10.1002/2016JB013073, 2. Swenson, S., D. Chambers, and J. Wahr (2008) Estimating geocenter variations from a combination of GRACE and ocean model output, J. Geophys. Res., 113, B08410, doi:10.1029/2007JB005338.