Documents archived by NASA’s Physical Oceanography Distributed Active Archive Center (PO.DAAC) provide technical information about the Gravity Recovery and Climate Experiment (GRACE) follow-on experiment (GRACE-FO). These include handbooks, processing documents, release notes, fact sheets, and technical notes.
General
| Document Title | Author | Description |
|---|---|---|
| GRACE-FO SDS Newsletter | F. Landerer, et al. | Monthly newsletter provided by the GRACE-FO Science Data System (SDS) describing science relevant events on the GRACE-FO space crafts and statistics on L0, L1 and L2 product generation. |
| GRACE-GRACE-FO Months RL06.cvs | NASA/JPL | Actual monthly-range of the valid data used to compute the GRACE and GRACE-FO Level-2 and -3 monthly products. |
| NASA Approved YAML encoding technical note | NASA/JPL | Document that describes the "YAML Ain't Markup Language" (YAML) encoding as the standard format for NASA GRACE/GRACE-FO mission ASCII data. |
Level 1
| Document Title | Author | Date | Description |
|---|---|---|---|
| AOD1B Product Description Document GRACE | H. Dobslaw, et al. | October 19, 2017 | Describes the atmospheric and ocean de-aliasing product (AOD1B) and the barotropic ocean model output (OCN1B). |
| GRACE-FO Level 1 Data Product User Handbook | Hui Ying Wen, et al. | Sept. 11, 2019 | Provides a comprehensive description of the content and format of the GRACE-FO SDS Level-1A and 1B data products. |
| Release Notes for GRACE-FO L1B products | Hui Ying Wen | Sept. 23, 2019 | Gives additional information on GRACE-FO L1B products (not contained in other L1 documents). |
| GRACE-FO Accelerometer Data Products | Christopher M. M. | May 20, 2019 | Provides the accelerometer data, which is calibrated to enable more optimal gravity field recovery. |
Level 2
| Document Title | Author | Date | Description |
|---|---|---|---|
| AOD1B Product Description Document GRACE | H. Dobslaw, et al. | October 19, 2017 | Describes the atmospheric and ocean de-aliasing product (AOD1B) and the barotropic ocean model output (OCN1B). |
| GRACE-FO Level 1 Data Product User Handbook | Hui Ying Wen, et al. | Sept. 11, 2019 | Provides a comprehensive description of the content and format of the GRACE-FO SDS Level-1A and 1B data products. |
| Release Notes for GRACE-FO L1B products | Hui Ying Wen | Sept. 23, 2019 | Gives additional information on GRACE-FO L1B products (not contained in other L1 documents). |
| GRACE-FO Accelerometer Data Products | Christopher M. M. | May 20, 2019 | Provides the accelerometer data, which is calibrated to enable more optimal gravity field recovery. |
Level 3
| Documentation Title | Author | Date | Description |
|---|---|---|---|
| GRACE-FO Level-3 Data Product User Handbook | Savannah S. Cooley and Felix W. Landerer | July 10, 2020 | This Handbook is designed to guide both experienced and beginner users in understanding and using Level-3 GRACE and GRACE-FO data products.The three main objectives of this document are to, 1) provide an overview of the GRACE-FO mission including the instrument design, science data processing, and calibration and validation procedures, 2) provide a description of the available Level-3 GRACE-FO data products and featured science and applications of Level-3 GRACE and GRACE-FO data, and 3) provide a set of step by step, reproducible use cases intended to serve as a reference for users who are interested in GRACE-FO Level-3 data products. |
| Release Notes for JPL GRACE-FO L3 MASCON RL06.3 products | David Wiese | September 10, 2024 | Information on Release 06.3 of the Level-3 MASCON data sets. |
Technical Notes
| Document Title | Author | Date | Description |
|---|---|---|---|
| GRACE-FO 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-FO Technical Note #01a: SPACECRAFT_EVENTS (SCE) File | NASA/JPL | This file contains GRACE-FO SPACECRAFT_EVENTS, manually written by Level-1 Science Data System operators at NASA JPL, and updated with each weekly incremental data release. The contents of this file augment the machine-readable Sequence of Events file | |
| GRACE-FO Technical Note #01b: KBR_GPS_Stats | NASA/JPL | KBR_GPS Status Report | |
| GRACE-FO Technical Note #11E: Monthly estimates of C20 and C30 from 6/7 satellites based on GRACE RL06 models (TXT, 31.77 KB) | M. Cheng and J. Ries | 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-FO Technical Note #12: Convert Global Mean OBP -> Global Mean Ocean Mass | July, 2020 | 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. | |
| GRACE-FO Technical Note #13a: degree-1 (geocenter) gravity coefficients from CSR RL06.3 | This file contains monthly estimates of degree-1 gravity coefficients for the GRACE/GRACE-FO Release-06.3 data by CSR, based on ocean and atmospheric models and GRACE/GRACE-FO coefficients for degrees 2 and higher. | ||
| GRACE-FO Technical Note #13b: degree-1 (geocenter) gravity coefficients from GFZ RL06.3 | This file contains monthly estimates of degree-1 gravity coefficients for the GRACE/GRACE-FO Release-06.3 data by GFZ, based on ocean and atmospheric models and GRACE/GRACE-FO coefficients for degrees 2 and higher. | ||
| GRACE-FO Technical Note #13c: degree-1 (geocenter) gravity coefficients from JPL RL06.3 | This file contains monthly estimates of degree-1 gravity coefficients for the GRACE/GRACE-FO Release-06.3 data by JPL, based on ocean and atmospheric models and GRACE/GRACE-FO coefficients for degrees 2 and higher. | ||
| GRACE-FO Technical Note #14: NASA GSFC SLR C20 and C30 solutions | 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 | |
| Missing and and Unused Days Table | CSV table of missing days for GRACE and GRACE-FO processing. Includes monthly information on missing days as well as unused days by each of the processing centers. |