Search found 365 matches

by LAADSx_UserServices_M
Tue Aug 27, 2024 8:27 am America/New_York
Forum: Home
Question: Scaling of Cloud Top Temperature product of MODIS L3
Replies: 8

Re: Scaling of Cloud Top Temperature product of MODIS L3

There are no negative CTT values for either of the files you mentioned (see attached).
Both offset and scale factor are correct as provided.
by LAADSx_UserServices_M
Mon Aug 26, 2024 2:08 pm America/New_York
Forum: Home
Question: Scaling of Cloud Top Temperature product of MODIS L3
Replies: 8

Re: Scaling of Cloud Top Temperature product of MODIS L3

see:
For stored value = 14840
CTT_actual =0.01*(14840-(-15000)) = 298.4

For stored value = 14960
CTT_actual =0.01*(14960-(-15000)) = 299.6
by LAADSx_UserServices_M
Fri Aug 23, 2024 8:26 am America/New_York
Forum: Home
Question: LAADS DAAC HTTP Error 401: Unauthorized
Replies: 1

Re: LAADS DAAC HTTP Error 401: Unauthorized

No, there is no delay in syncing Earthdata token to the LAADS server. If your Earthdata token is not expired (it expires every 90 days, so check expiration date of your token on Generate Token page) you should not get 401 error. Try using the wget command-line utility by running the command below us...
by LAADSx_UserServices_M
Mon Aug 19, 2024 7:15 am America/New_York
Forum: Home
Question: Scaling of Cloud Top Temperature product of MODIS L3
Replies: 8

Re: Scaling of Cloud Top Temperature product of MODIS L3

Following information is provided in the HDF file metadata: MYD08_D3.A2003039.061.2018005124705.hdf Cloud_Top_Temperature_Mean (720, 288) 16-bit integer, 180 x 360 Number of attributes = 12 valid_range = 0,20000 _FillValue = -9999 long_name = Cloud Top Temperature: Mean units = Degrees Kelvin scale_...
by LAADSx_UserServices_M
Wed Jul 31, 2024 3:02 pm America/New_York
Forum: Home
Question: Missing AOD Data for First Three Weeks of January 2022 from MCD19A2 V061
Replies: 2

Re: Missing AOD Data for First Three Weeks of January 2022 from MCD19A2 V061

Except 2022/001, we have the data (tile:h13v12) available in LAADS (https://ladsweb.modaps.eosdis.nasa.gov/archive/allData/61/MCD19A2/2022/) and also in LPDAAC (https://e4ftl01.cr.usgs.gov/MOTA/MCD19A2.061/) between 01/01/2022 – 01/22/2022.
by LAADSx_UserServices_M
Wed Jul 24, 2024 8:09 am America/New_York
Forum: Home
Question: Open Source VIIRS processing Software?
Replies: 3

Re: Open Source VIIRS processing Software?

Information is provided in response to your other message.
by LAADSx_UserServices_M
Wed Jul 24, 2024 8:07 am America/New_York
Forum: Home
Question: Missing Production CLDPROP NPP/VIIRS Software?
Replies: 1

Re: Missing Production CLDPROP NPP/VIIRS Software?

Dear Nick: Specifying product makes a big difference. The MODAPS page you were referred was for software that are used to generate products at MODAPS-LAADS (MODIS level 1, atmosphere,land, and VIIRS level1, land, and other products) . However, NASA's Atmosphere Science Investigator-led Processing Sy...
by LAADSx_UserServices_M
Tue Jul 23, 2024 6:15 am America/New_York
Forum: Home
Question: The convention of the sensor azimuth and the solar azimuth variable provided in the MYD06 data product
Replies: 1

Re: The convention of the sensor azimuth and the solar azimuth variable provided in the MYD06 data product

The solar azimuth angle is the compass direction from which the sunlight is coming at a particular location and time. The sensor azimuth angle is the direction from which the satellite sensor is viewing the target point on the Earth’s surface. The angle 0 degree represents north, 90 degree represent...
by LAADSx_UserServices_M
Mon Jul 22, 2024 10:00 am America/New_York
Forum: Home
Question: Open Source VIIRS processing Software?
Replies: 3

Re: Open Source VIIRS processing Software?

No, there is no open source release of the software used to created VIIRS level 2 data. However, in some case users can request for the software following steps and instruction provided at:
https://modaps.modaps.eosdis.nasa.gov/services/pge/