| GRACE Product Specification Document GRACE 327-720 Revision: 4.6 |
Provides a detailed description of data products at all levels for the GRACE mission. |
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GRACE Documentation
General Documentation
Level 1B Documentation
| GRACE Level 1B Data Product User Handbook JPL D-22027 GRACE 327-733 Revision: 1.3 |
Provides a comprehensive description of the content and format of the Level 1B data. |
| AOD1B Product Description Document GRACE 327-750 Revision: 6.1 |
Describes the atmospheric and ocean de-aliasing product (AOD1B) and the barotropic ocean model output (OCN1B). |
| Algorithm Theoretical Basis Document for GRACE Level 1B Data Processing GRACE 327-741 Revision: 1.2 |
Describes the algorithms producing the main quantities on the Level 1B data. |
Level 2 Documentation
| GFZ Level-2 Processing Standards Document for Product Release 06 GRACE 327-743 Revision: 0.0 |
Describes the processing standards, models, and parameters adopted for the Level-2 Product Release 06 generated at GFZ. |
| CSR Level-2 Processing Standards Document for Product Release 06 GRACE 327-742 Revision: 5.0 |
Describes the processing standards, models, and parameters adopted for the Level-2 Product Release 06 generated at CSR. |
| JPL Level-2 Processing Standards Document for Product Release 06 GRACE 327-744 Revision: 6.0 |
Describes the processing standards, models, and parameters adopted for the Level-2 Product Release 06 generated at JPL. |
| Level-2 Gravity Field Product User Handbook GRACE 327-734 Revision: 4.0 |
Provides a description of the Earth gravity field estimates provided by the Level 2 processing. |
Ancillary Documentation
| An Analysis of Gravity-Field Estimation Based on Inter-satellite Dual One-Way Biased Ranging JPL Publication 98-15 Author: J.B. Thomas |
Describes a dual one-way approach for extracting "high-rate" k-band intersateliite biased range measurements. |
| Optimal combination of quaternions from multiple star cameras JPL Internal Memorandum Author: L.J. Romans |
Describes a procedure for optimally combining quaternions measured simultaneously from different aligned star cameras. |
L1 and L2 Release Notes
| Release Notes for CSR RL06 GRACE L2 products
Author: S. Bettadpur |
Gives additional information on CSR RL06 GRACE L2 products (not contained in CSR RL05 processing standards document). |
| Release Notes for GFZ RL06 GRACE L2 products
Author: C. Dahle |
Gives additional information on GFZ RL06 GRACE L2 products (not contained in GFZ RL05 processing standards document). |
| Release Notes for JPL RL06 GRACE L2 products
Author: Christopher M. McCullough, David N. Wiese, & Dah-Ning Yuan |
Gives additional information on JPL RL06 GRACE L2 products (not contained in JPL RL05 processing standards document). |
Technical Notes
| GRACE Technical Note #01: Sequence of Events (SOE) File
Updated Daily |
Provides a record of changes of the state of a specific satellite sensor or satellite event, which may alter the processing parameters used for the L1B processing. This file is updated on a daily basis. |
| GRACE Technical Note #02: ACC blases
Author: S. Bettadpur |
Provides recommendations for a-priori bias & scale parameters for Level 1B ACC data. |
| GRACE Technical Note #03: Sequence of Events (SOE) format description
Author: G. Kruizinga |
Provides a detailed description and format information on how the SOE file is organized. |
| GRACE Technical Note #04: Usage guidelines for GFZ RL03 and JPL RL02 GRACE gravity fields & atmosphere/ocean background models
Authors: S. Bettadpur, F. Flechtner, R. Schmidt |
Provides detailed guidelines for usage on GFZ RL03 and JPL RL02 GRACE models. |
| GRACE Technical Note #06: Impact of change in AOD1B on RL04 monthly GSM
Author: S. Bettadpur |
Discusses the impact on GRACE level 2 products of the reprocessing of June 2006 through September 2007 GRACE AOD1B data. It is recommended that the following products be replaced with the re-processed ones: AOD1B, GSM-2, GAC-2, and GAD-2. |
| GRACE Technical Note #11E: Monthly estimates of C20 and C30 from 6/7 satellites based on GRACE RL06 models
Authors: M. Cheng and J. Ries Date: January 25, 2023 |
Use these estimates to replace the C20 values (and C30 values starting March 2012) from the GSM files of the GRACE(-FO) RL06.X products only. These estimates are not intended to be used with the GRACE RL05 or earlier products. |
| GRACE Technical Note #12: Convert Global Mean OBP -> Global Mean Ocean Mass | This calculation uses AOD1B 'GAC' fields, and integrates over the ocean-area only; due to the definition of 'GAC' (see AOD1B handbook for further details), the resulting mean value effectively represents 'mean atmospheric mass over the global ocean' for each time step. |
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GRACE Technical Note #13a: degree-1 (geocenter) gravity coefficients from CSR RL06.2 |
This file contains monthly estimates of degree-1 gravity coefficients for the GRACE Release-06.2 data, based on ocean and atmospheric models and GRACE coefficients for degrees 2 and higher.
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GRACE Technical Note #13b: degree-1 (geocenter) gravity coefficients from GFZ RL06.1 |
This file contains monthly estimates of degree-1 gravity coefficients for the GRACE Release-06.1 data, based on ocean and atmospheric models and GRACE coefficients for degrees 2 and higher. |
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GRACE Technical Note #13c: degree-1 (geocenter) gravity coefficients from JPL RL06.1
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This file contains monthly estimates of degree-1 gravity coefficients for the GRACE Release-06.1 data, based on ocean and atmospheric models and GRACE coefficients for degrees 2 and higher. |
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GRACE Technical Note #14: NASA GSFC SLR C20 and C30 solutions Authors: B.D. Loomis and K.E. Rachlin |
This file contains SLR-derived C20 and C30 values for replacing GRACE/GRACE-FO GSM Values prior to MJD 56006 use 5 satellites: LAGEOS-1/2, Stella, Starlette, AJISAI Values beginning on MJD 56006 use 7 atellites: LARES and Larets added C30 values are not provided prior to MJD 56006 Estimated parameters for both 5 and 7-satellite configurations: 5x5+C61,S61
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