Search found 243 matches
- Thu Sep 28, 2023 10:24 am America/New_York
- Forum: Questions/Comments
- Question: Georeference Suomi-NPP NRT HDF to GeoTIFF
- Replies: 1
Re: Georeference Suomi-NPP NRT HDF to GeoTIFF
Somehow missed your post. You may want to explore tools available from LAADS DAAC. The information about these tools can be found here: https://ladsweb.modaps.eosdis.nasa.gov/tools-and-services/#ldope The User Guide for the Reproject tool has an example of first reprojection of the MODIS/VIIRS data ...
- Mon Sep 11, 2023 12:42 pm America/New_York
- Forum: Questions/Comments
- Question: NASA's Black Marble monthly data: Reprojection isn't accurate
- Replies: 1
Re: NASA's Black Marble monthly data: Reprojection isn't accurate
Hi Nikolaos, Yes, it appears that the issue lies in how you're calculating the spatial extent. This is how you calculate the bounding box using the horizontal (h) and vertical(v) time number – WestBoundCoord = (10*HorizontalTileNumber) - 180 NorthBoundCoord = 90-(10*VerticalTileNumber) EastBoundCoor...
- Mon Sep 11, 2023 11:10 am America/New_York
- Forum: Questions/Comments
- Question: VIIRS NOAA21
- Replies: 1
Re: VIIRS NOAA21
We are hoping to have NOAA21 VIIRS data available from LAADS by the end of the year. We will post a product release notice on ladsweb (https://ladsweb.modaps.eosdis.nasa.gov/alerts-and-issues/) page once the data are available for download.
- Mon Sep 11, 2023 10:38 am America/New_York
- Forum: Questions/Comments
- Question: Downloading Individual MODIS bands
- Replies: 1
Re: Downloading Individual MODIS bands
You can extract each layer by performing parameter subsetting using LAADS Post-Processing tools from LAADS “Find Data” Interface: https://ladsweb.modaps.eosdis.nasa.gov/search/ If you are new to ladsweb, you can consult the post processing tutorial at: https://ladsweb.modaps.eosdis.nasa.gov/learn/ho...
- Mon Sep 11, 2023 10:06 am America/New_York
- Forum: Questions/Comments
- Question: VIIRS Spectral AOT Access
- Replies: 1
Re: VIIRS Spectral AOT Access
All SDSs available in each level 2 and level 3 product are listed at:
https://ladsweb.modaps.eosdis.nasa.gov/missions-and-measurements/science-domain/aerosol/#viirs
https://ladsweb.modaps.eosdis.nasa.gov/missions-and-measurements/science-domain/aerosol/#viirs
- Wed Sep 06, 2023 9:20 am America/New_York
- Forum: Questions/Comments
- Question: Re-griding the MODIS Aqua L2 cloud product.
- Replies: 1
Re: Re-griding the MODIS Aqua L2 cloud product.
Dear Aakash Kumar: To be more accurate, the user can use the 1-km “Latitude” and “Longitude” (2030x1354) from MYD03, to identify how many 1-km cloud microphysical properties pixels fall within 5-km cloud top properties pixel. For example, assume “number_of_1km” pixels fall in a 5-km pixel, they can ...
- Thu Aug 24, 2023 1:22 pm America/New_York
- Forum: Questions/Comments
- Question: MYD021KM data missing in 2009/11/25
- Replies: 3
Re: MYD021KM data missing in 2009/11/25
Because science team set more stricter QA rules for Collection 6 on ward.
- Tue Aug 22, 2023 11:26 am America/New_York
- Forum: Questions/Comments
- Question: MYD021KM data missing in 2009/11/25
- Replies: 3
Re: MYD021KM data missing in 2009/11/25
This is a data outage period which is documented at data outage page:
https://modaps.modaps.eosdis.nasa.gov/services/production/outages_aqua.html
https://modaps.modaps.eosdis.nasa.gov/services/production/outages_aqua.html
- Tue Aug 22, 2023 7:18 am America/New_York
- Forum: Questions/Comments
- Question: Fine mode fraction aerosol over ocean in MODIS SDS
- Replies: 3
Re: Fine mode fraction aerosol over ocean in MODIS SDS
In MODIS collection 6.1 datasets (e.g. MOD04_L2), there are four variables relevant to fine model: 1. Optical_Depth_Ratio_Small_Ocean_0.55micron: is the fraction of AOT (at 0.55 micron) contributed by fine mode for average solution. 2. Optical_Depth_Small_Average_Ocean: is the retrieved optical thic...
- Fri Aug 18, 2023 6:56 am America/New_York
- Forum: Questions/Comments
- Question: CTT variable incorrect range
- Replies: 1
Re: CTT variable incorrect range
You can confirm the value from product's file specification at:
https://atmosphere-imager.gsfc.nasa.gov/products/monthly/file-spec
https://atmosphere-imager.gsfc.nasa.gov/products/monthly/file-spec