Search found 283 matches

by LAADS_UserServices_M
Tue Aug 22, 2023 7:18 am America/New_York
Forum: Home
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...
by LAADS_UserServices_M
Fri Aug 18, 2023 6:56 am America/New_York
Forum: Home
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
by LAADS_UserServices_M
Fri Aug 18, 2023 6:40 am America/New_York
Forum: Home
Question: Black Marble NTL data (VNP46A2)
Replies: 5

Re: Black Marble NTL data (VNP46A2)

VNP46A2 mask Auroras but not fires and gas flares.
by LAADS_UserServices_M
Wed Aug 16, 2023 8:30 am America/New_York
Forum: Home
Question: VNP02DNB_NRT and VJ102DNB_NRT
Replies: 1

Re: VNP02DNB_NRT and VJ102DNB_NRT

We feel like your note is inaccurate. We looked at the granule you suggested, and the QF is all fill, it is a night granule. We looked at a night granule from day 2023070 and it was the same way. Then we looked at a VNP02DNB from 2023223.2306, and it looks like one would expect. We are not seeing an...
by LAADS_UserServices_M
Tue Aug 15, 2023 7:15 am America/New_York
Forum: Home
Question: Black Marble NTL data (VNP46A2)
Replies: 5

Re: Black Marble NTL data (VNP46A2)

1. I understand ephemeral lights are not filtered from the A2 product (am I correct to understand that this means light sources like fires, auroras, gas flares are still present in the data?). Do you happen to know of studies that have made an effort to filter these other light sources from the dail...
by LAADS_UserServices_M
Mon Jul 31, 2023 12:18 pm America/New_York
Forum: Home
Question: wget to download data
Replies: 2

Re: wget to download data

Please see the banner at the top of the page and ladsweb alerts:
https://ladsweb.modaps.eosdis.nasa.gov/alerts-and-issues
by LAADS_UserServices_M
Mon Jul 31, 2023 12:16 pm America/New_York
Forum: Home
Question: Download nightime lights data
Replies: 1

Re: Download nightime lights data

It is because of a system wide issue (see the banner at the top of this page). Also, visit ladsweb alerts at:
https://ladsweb.modaps.eosdis.nasa.gov/alerts-and-issues
by LAADS_UserServices_M
Wed Jul 26, 2023 12:49 pm America/New_York
Forum: Home
Question: 504 Gateway Time-out
Replies: 6

Re: 504 Gateway Time-out

For up-to-date information visit LAADS news and alerts.
https://ladsweb.modaps.eosdis.nasa.gov/alerts-and-issues/
by LAADS_UserServices_M
Tue Jul 25, 2023 9:09 am America/New_York
Forum: Home
Question: download MODIS data
Replies: 1

Re: download MODIS data

Dear Marco Laiolo:
There is a system wide issue that is affecting all data download from ladsweb, see:
https://ladsweb.modaps.eosdis.nasa.gov/alerts-and-issues/117944