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Re: How to quantify GRACE uncertainty?

Hi,

Scale factors, measurement and leakage errors were shared in the previous release (Level 3, RL-05). However, these are not available in the current GRACE and GRACE-FO datasets. Has any information been shared on how to calculate the uncertainty in the TWS data?

Thanks a lot.
by assilina
Sun Apr 26, 2020 2:22 pm
 
Forum: General Questions
Topic: How to quantify GRACE uncertainty?
Replies: 4
Views: 5602

Why do I need GRACE Tellus Mascon Scale Factors?

Using 3-degree mascons as a basis function acts as an inherent smoother on the data. Therefore, the GRACE/Tellus Project has derived a set of scale factors (what are also referred to as global gain factors) to aid in the interpretation of signals at sub-mascon resolution. This approach is similar to...
by dmoroni
Tue Mar 08, 2016 2:26 pm
 
Forum: Gravity FAQ
Topic: Why do I need GRACE Tellus Mascon Scale Factors?
Replies: 0
Views: 6662

Where can I obtain a list of science publications for GRACE?

The following link provides a list of relevant GRACE and Tellus publications through peer-reviewed science journals: http://grace.jpl.nasa.gov/publications/ Note: this list is not maintained by PO.DAAC. For any questions or concerns about this list, please contact the site manager at the following l...
by dmoroni
Tue Mar 08, 2016 2:35 pm
 
Forum: Gravity FAQ
Topic: Where can I obtain a list of science publications for GRACE?
Replies: 0
Views: 7894

passing time of the GRACE satellite

How can i know the passing time of the GRACE satellite over a location? Particularly in the following coordinates, latitudes 13.5,14.5,15.5 and longitudes 76.5,77.5,78.5
by jyolsna
Tue Aug 20, 2019 1:36 am
 
Forum: General Questions
Topic: passing time of the GRACE satellite
Replies: 1
Views: 6305

Re: GRACE Global Groundwater Data

There is no official "GRACE Global Groundwater Data”. What one does is get the GRACE Total Terrestrial Water Storage Anomaly (TWSA). For example: https://podaac-opendap.jpl.nasa.gov/opendap/allData/tellus/L3/mascon/RL05/JPL/CRI/netcdf/ Then, based on estimates of other components of the terrest...
by mgierach
Tue Mar 27, 2018 9:03 am
 
Forum: General Questions
Topic: GRACE Global Groundwater Data
Replies: 1
Views: 7648

Why are there missing GRACE data?

The batteries onboard GRACE have degraded over time so the instrument is turned off when the satellite is in eclipse (in Earth's shadow) and turned back on when in sunlight since the batteries are solar charged.
by podaac
Mon Apr 07, 2014 12:00 pm
 
Forum: Gravity FAQ
Topic: Why are there missing GRACE data?
Replies: 0
Views: 1519

New Animation-Ocean/Land Mass Anomaly from GRACE (2002-2017)

Animation of the ocean/land mass anomaly over the period April 2002 to June 2017 from the JPL GRACE MASCON RL06M CRI dataset. The dataset can be accessed from PODAAC Portal at https://podaac.jpl.nasa.gov/dataset/TELLUS_GRACE_MASCON_CRI_GRID_RL06_V1 (DOI:10.5067/TEMSC-3MJC6) Animation available on th...
by podaac
Thu Aug 15, 2019 2:04 pm
 
Forum: Animations
Topic: New Animation-Ocean/Land Mass Anomaly from GRACE (2002-2017)
Replies: 0
Views: 1023

Re: passing time of the GRACE satellite

Thank you for your inquiry. Please see the following response from the GRACE science team: Neither GRACE nor GRACE-FO have a repeat orbit, so there is no such thing as a specific time at which the satellites pass over a specific location during the month. The orbital states/position of the satellite...
by podaac
Mon Aug 26, 2019 9:29 am
 
Forum: General Questions
Topic: passing time of the GRACE satellite
Replies: 1
Views: 6305

JPL/GFZ/CSR GRACE & GRACE-FO L3 Monthly Ocean Mass Anom RL06

JPL/GFZ/CSR GRACE and GRACE-FO Level 3 Monthly Ocean Mass Anomaly RL06 version 02 Datasets Release DOI: 1. https://doi.org/10.5067/TEOCN-3AJ62 2. https://doi.org/10.5067/TEOCN-3AC62 3. https://doi.org/10.5067/TEOCN-3AG62 4. https://doi.org/10.5067/GFOCN-3AJ62 5. https://doi.org/10.5067/GFOCN-3AC62 ...
by podaac
Mon Oct 28, 2019 11:09 am
 
Forum: PODAAC General Announcements
Topic: JPL/GFZ/CSR GRACE & GRACE-FO L3 Monthly Ocean Mass Anom RL06
Replies: 0
Views: 1098

New Animation - JPL GRACE & GRACE-FO Mascon L3 Monthly Glob.

JPL GRACE and GRACE-FO Mascon L3 Monthly Global Mass Anomaly RL06Mv2 CRI (2002-2019) Animation of the JPL GRACE and GRACE-FO Mascon L3 Monthly Global Mass Anomaly RL06Mv2 CRI from 2002 to 2019. The dataset was derived from GRACE and GRACE-FO and processed at JPL using the Mascon approach (Version2/...
by podaac
Thu Dec 05, 2019 1:08 pm
 
Forum: Animations
Topic: New Animation - JPL GRACE & GRACE-FO Mascon L3 Monthly Glob.
Replies: 0
Views: 2114
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