Search found 142 matches

by GES DISC - jimacker
Thu Mar 05, 2020 2:58 pm America/New_York
Forum: All Questions/Comments
Question: Soil porosity
Replies: 3

Soil porosity

The GES DISC Help Desk recently received this question from a user, and it was answered by a GES DISC staff scientist. It is provided here for information content. I have a question regarding the conversion of the soil moisture content from kg m-2 (or mm) to volumetric soil moisture. Therefore, I'l...
by GES DISC - jimacker
Thu Mar 05, 2020 2:52 pm America/New_York
Forum: All Questions/Comments
Question: Aggregating runoff data in a hydrological catchment
Replies: 1

Re: Aggregating runoff data in a hydrological catchment

Here is the answer, a collaboration between our SME and a GES DISC staff scientist. 1. GLDAS total runoff is the sum of subsurface runoff “Qsb_acc” and surface runoff “Qs_acc”. 2. Since the units of “kg m-2” as 3-hour accumulation is correct, there is no near term plan to change the units in the Ne...
by GES DISC - jimacker
Thu Mar 05, 2020 2:51 pm America/New_York
Forum: All Questions/Comments
Question: Aggregating runoff data in a hydrological catchment
Replies: 1

Aggregating runoff data in a hydrological catchment

The GES DISC Help Desk recently received this question from a user, and it was answered by a Subject Matter Expert. It is provided here for information content. I have a question regarding the runoff data from the GLDAS dataset and the way I should aggregate it within a hydrologic catchment. I have...
by GES DISC - jimacker
Thu Mar 05, 2020 12:59 pm America/New_York
Forum: All Questions/Comments
Question: AIRS
Replies: 3

Re: AIRS

This was actually a question from our testing phase. Did you want additional information about the IR channels of AIRS?
by GES DISC - jimacker
Wed Mar 04, 2020 4:14 pm America/New_York
Forum: All Questions/Comments
Question: GES DISC Announcement: Data-in-Action - Unusual Antarctic temperatures observed with AIRS data
Replies: 0

GES DISC Announcement: Data-in-Action - Unusual Antarctic temperatures observed with AIRS data

The NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) has recently published a Data-in-Action article entitled "Atmospheric Infrared Sounder (AIRS) surface temperature data show unusual Antarctic high temperatures in February" From the Introduction: In early Febru...
by GES DISC - jimacker
Wed Mar 04, 2020 4:07 pm America/New_York
Forum: All Questions/Comments
Question: GES DISC Announcement: February 2020 analysis of temperature and precipitation
Replies: 0

GES DISC Announcement: February 2020 analysis of temperature and precipitation

The NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) has published its analysis of anomalies and extremes in global surface air temperatures and precipitation for the month of February 2020. The assessment uses: 1. Atmospheric Infrared Sounder (AIRS) surface air temperatur...
by GES DISC - jimacker
Tue Mar 03, 2020 3:23 pm America/New_York
Forum: All Questions/Comments
Question: Data Quality of MODIS aqua level-3 chlorophyll-a and need of Regional Algorithm
Replies: 1

Re: Data Quality of MODIS aqua level-3 chlorophyll-a and need of Regional Algorithm

Dear Antu, Thank you for an excellent question. However, the appropriate Distributed Active Archive Center (DAAC) to answer your question is the Ocean Biology DAAC, OB.DAAC, https://oceancolor.gsfc.nasa.gov . The OB.DAAC has a User Forum that is dedicated to answering questions from the ocean color ...
by GES DISC - jimacker
Wed Feb 19, 2020 2:32 pm America/New_York
Forum: All Questions/Comments
Question: MERRA
Replies: 0

Re: MERRA

Our Subject Matter Expert indicates that the best MERRA-2 rainfall product to use is the Total Surface Precipitation, time average, Hourly temporal resolution.
by GES DISC - jimacker
Tue Feb 11, 2020 12:06 pm America/New_York
Forum: All Questions/Comments
Question: AIRS subsetting
Replies: 1

Re: AIRS subsetting

Answer: The daily volume of AIRS L1B products is: The average size of each granule: L1B-AIRS-IR-Rad: 13,440 Mb L1B-Vis/NIR-Rad: 2,640 Mb L1B-AMSU-Rad: 144 Mb L1B-HSB-Rad: 408 Mb L2-Standard-Product: 552 Mb L2-Support-Product: 2,496 Mb L2-Cloud-Cleared-Rad: 2,280 Mb L1B-AIRS-IR-Rad: 56 Mb L1B-Vis/NIR...
by GES DISC - jimacker
Tue Feb 04, 2020 11:37 am America/New_York
Forum: All Questions/Comments
Question: TMPA and IMERG
Replies: 1

Re: TMPA and IMERG

There is a document comparing the datasets:

https://docserver.gesdisc.eosdis.nasa.g ... sition.pdf

More technical information can be found if you wish a comparison of the data characteristics in each product.