GRACE LEVEL 1B JPL RELEASE 3.0

(GRACE_L1B_GRAV_JPL_RL03)
16 Publications Cited this Dataset
Citation metrics available for years (2014-2021)
Version3
Processing Level1B
Start/Stop Date2002-Apr-01 to 2017-Jul-01
Short NameGRACE_L1B_GRAV_JPL_RL03
DescriptionFOR EXPERT USE ONLY. The GRACE Level 1B data provide all necessary inputs to derive monthly time variations in the Earth's gravity field. Level 1B data are also used for GRACE orbit and mean gravity field determination. It contains K-Band Ranging Data Product (KBR1B), Star Camera Data Product (SCA1B), Accelerometer Data Product (ACC1B), GPS Data Product (GPS1B), Vector Products (VGN1B, VGO1B, VGB1B, VCM1B, VKB1B, VSL1B), Quaternion Products (QSA1B, QSB1B), and Housekeeping Products (AHK1B, IHK1B, THR1B, TNK1B, MAG1B, MAS1B, TIM1B)The GRACE Level-1B RL03 data consists only of updated spacecraft attitude (SCA1B) and K-band inter-satellite ranging (KBR1B) data. All other Level-1B were not changed and it is recommended to use the RL02 products with the updated RL03 KBR1B and SCA1B products. The RL03 SCA1B data were corrected for a stellar aberration error in the onboard star tracker software and incorrect data weighting in the star tracker combination software. For the RL03 SCA1B data a new software module was developed that uses Kalman filtering, field of view error modeling, relative alignment adjustment and the inclusion of angular spacecraft body acceleration measurements from the ACC instrument. This new processing resulted in a significant reduction in high frequency noise and the elimination of jumps during transitions between dual and single star tracker operation. The KBR1B product is updated as well because the KBR antenna phase center range correction, range rate correction and range acceleration are computed using the spacecraft attitude information (SCA1B). Only these three correction values were updated in the KBR1B product. All other entries in the KBR1B remained the same.
DOI10.5067/GRJPL-L1B03
MeasurementSOLID EARTH > GRAVITY/GRAVITATIONAL FIELD > GRAVITY
Swath Width-1 km
Platform/Sensor
GRACE
Platform
Name: Gravity Recovery and Climate Experiment (GRACE)
Orbit Period: 94.5 minutes
Inclination Angle: 89.0 degrees
/
GRACE SCA
SENSOR
Name: Star Camera Assembly (GRACE SCA)

GRACE
Platform
Name: Gravity Recovery and Climate Experiment (GRACE)
Orbit Period: 94.5 minutes
Inclination Angle: 89.0 degrees
/
KBR
SENSOR
Name: K-Band Ranging system (KBR)

GRACE
Platform
Name: Gravity Recovery and Climate Experiment (GRACE)
Orbit Period: 94.5 minutes
Inclination Angle: 89.0 degrees
/
GRACE ACC
SENSOR
Name: GRACE SuperSTAR Accelerometer (GRACE ACC)

GRACE
Platform
Name: Gravity Recovery and Climate Experiment (GRACE)
Orbit Period: 94.5 minutes
Inclination Angle: 89.0 degrees
/
GPS
SENSOR
Name: Global Positioning System (GPS)

ProjectGravity Recovery and Climate Experiment (GRACE)
Data ProviderPublisher: JPL
Creator: GRACE
Release Place: JPL
Release Date: 2018-Jul-05
Resource: https://grace.jpl.nasa.gov/mission/grace/

FormatASCII
Keyword(s)gravity, GRACE, JPL, L1B, RL03, Level-1
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
Resolution
Spatial Resolution: 500 Kilometers x 500 Kilometers
Temporal Resolution: Monthly - < Annual
 
Coverage
Region: GLOBAL
North Bounding Coordinate: 88 degrees
South Bounding Coordinate: -88 degrees
West Bounding Coordinate: -180 degrees
East Bounding Coordinate: 180 degrees
Time Span: 2002-Apr-01 to 2017-Jul-01
Granule Time Span: 2002-Apr-01 to 2017-Jun-30
Swath Width: -1 km
 
Projection
Projection Type: Spherical
Projection Detail: N/A
Ellipsoid: WGS 84
 
Citation is critically important for dataset documentation and discovery. Please cite the data as follows, and cite the reference papers when it is appropriate.
Citation GRACE. 2018. GRACE_L1B_GRAV_JPL_RL03. Ver. 3. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/GRJPL-L1B03

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For more information see Data Citations and Acknowledgments.

Journal Reference K. Case, G. Kruizinga, and S. Wu, 2002, GRACE Level 1B Data Product User Handbook, JPL Publication D-22027. https://podaac-tools.jpl.nasa.gov/drive/files/allData/grace/docs/Handbook_1B_v1.3.pdf

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VersionDatasetVersion DateStatus
3GRACE LEVEL 1B JPL RELEASE 3.02023-02-21COMPLETE2023-02-21T01:24:00.000Z
2GRACE LEVEL 1B JPL RELEASE 2.02023-06-01COMPLETE2023-06-01T00:06:00.000Z
1GRACE LEVEL 1B JPL RELEASE 1.0PresentRETIRED.
0GRACE LEVEL 1B JPL RELEASE 0.0PresentRETIRED.