Search found 287 matches

by LAADS_UserServices_M
Fri May 26, 2023 11:58 am America/New_York
Forum: Home
Question: Missing Aerosol Optical Depth (AOD) Data in MYD04_L2
Replies: 9

Re: Missing Aerosol Optical Depth (AOD) Data in MYD04_L2

Dear Laxmi: Please note the following: Have you tried to cross-reference the missing areas with the MODIS cloud mask (MxD35_L2) to see if those areas have persistent cloud. You can also reference a RGB reflectance image for this. With regard to this question: coverage of the MODIS swath keeps on cha...
by LAADS_UserServices_M
Mon May 22, 2023 11:50 am America/New_York
Forum: Home
Question: Missing Aerosol Optical Depth (AOD) Data in MYD04_L2
Replies: 9

Re: Missing Aerosol Optical Depth (AOD) Data in MYD04_L2

Dear Laxmi:
Can you provide an example from files that exhibit such behavior (couple of file names should be sufficient)?
by LAADS_UserServices_M
Thu May 18, 2023 8:55 am America/New_York
Forum: Home
Question: VIIRS VNP46A2 timestamp acquisition time
Replies: 1

Re: VIIRS VNP46A2 timestamp acquisition time

This is because VNP46A2 is a daily products containing observation for the 24h period. You can find UTC-Time parameter in VNP46A1 product that lists UTC view time (the time of data acquisition). For more information consult product users guide at: https://ladsweb.modaps.eosdis.nasa.gov/api/v2/conten...
by LAADS_UserServices_M
Tue May 16, 2023 7:15 am America/New_York
Forum: Home
Question: Request the bi-values needed to calculate LST using the Generalized Split Window (GSW) algorithm with the MYD021KM produ
Replies: 3

Re: Request the bi-values needed to calculate LST using the Generalized Split Window (GSW) algorithm with the MYD021KM p

Here at LAADS DAAC we don't have contact information for land products' science team members. The product PI for LST is Zhengming Wan at ERI, University of California, Santa Barbara so you can check there. You can contact NASA'S Land Processes Distributed Active Archive Center (LP DAAC), the primary...
by LAADS_UserServices_M
Fri May 12, 2023 11:22 am America/New_York
Forum: Home
Question: VNP46A2 discrepancy between CMR and LADSWEB
Replies: 2

Re: VNP46A2 discrepancy between CMR and LADSWEB

The missing files are in the queue and should be available soon.
by LAADS_UserServices_M
Fri May 12, 2023 11:04 am America/New_York
Forum: Home
Question: Request the bi-values needed to calculate LST using the Generalized Split Window (GSW) algorithm with the MYD021KM produ
Replies: 3

Re: Request the bi-values needed to calculate LST using the Generalized Split Window (GSW) algorithm with the MYD021KM p

We received your inquiry about the bi coefficients applied in LST retrieval. These coefficients are used to generate high-level MODIS products, which were produced using algorithms developed by MODIS science team members on top of our Level 1B data. We suggest you contact the people in this area as ...
by LAADS_UserServices_M
Wed May 10, 2023 9:35 am America/New_York
Forum: Home
Question: CLDMSK_L2_VIIRS_SNPP_NRT CMR STAC access endpoint
Replies: 2

Re: CLDMSK_L2_VIIRS_SNPP_NRT CMR STAC access endpoint

The NRT product is provided by Atmosphere Science Investigator-led Processing System, Space Science and Engineering Center, University of Wisconsin-Madison and not by LAADS DAAC. So, you should find it at:
https://cmr.earthdata.nasa.gov/stac/ASIPS/collections/CLDMSK_L2_VIIRS_SNPP_NRT
by LAADS_UserServices_M
Fri May 05, 2023 7:20 am America/New_York
Forum: Home
Question: Delay in publication to s3://prod-lads
Replies: 4

Re: Delay in publication to s3://prod-lads

Data are posted to ladsweb and AWS almost simultaneously however we found an issue with the file transfer to AWS which is now resolved. However, it will take system sometimes to catch up. We are hoping that VNP46A2 files will be current in AWS in few days (early to mid of next week).