Search found 37 matches

by hanzhi.lin
Wed Oct 19, 2022 10:38 pm America/New_York
Forum: Questions/Comments
Question: Incomplete MODIS L1A granule list on LAADS archive
Replies: 7

Incomplete MODIS L1A granule list on LAADS archive

Hi, I found on LAADS archive, for some days, only a few MODIS L1A granules are available to download, or be visible, such as MODIS-Aqua L1A on the day 2021013. My questions is: if I use the recommended wget download command for this day, without ordering them from LAADS in advance, can I get the who...
by hanzhi.lin
Wed Oct 19, 2022 4:22 pm America/New_York
Forum: Questions/Comments
Question: Incomplete MODIS L1A granule list on LAADS archive
Replies: 7

MODIS L1A are not mission complete in online Archive

Hi, I found in LAADS' online archive, for some day in MODIS history, only partial L1A granules of that day are available to show. For example for the day 2021013, only six L1A granules are available: https://ladsweb.modaps.eosdis.nasa.gov/archive/allData/6/MYD01/2021/013/ Does it mean that if I use ...
by hanzhi.lin
Mon Oct 17, 2022 2:18 pm America/New_York
Forum: Questions/Comments
Question: MODIS Terra geolocation files
Replies: 4

MODIS Terra geolocation files

Hi, I may need to download Terra geolocation files and found there is a folder of Terra geolocation on oceandata website: https://oceandata.sci.gsfc.nasa.gov/directdataaccess/Geo-Location/Terra-MODIS, but no file inside this folder. Is this Terra-Geofile folder a relic or it is planned to be filled?...
by hanzhi.lin
Mon Sep 12, 2022 4:19 pm America/New_York
Forum: Questions/Comments
Question: MODIS L1A granules from OB.DAAC and LAADS
Replies: 4

Re: MODIS L1A granules from OB.DAAC and LAADS

Hi Sean, I found the production time listed in the local granule ID name inside the L1A granule on OB is different from the normal granule on LAADs which has the same collecting timestamp, nor different from the NRT granule on LANCE that is also with the same timestamp. Does this difference count fo...
by hanzhi.lin
Fri Sep 09, 2022 3:16 pm America/New_York
Forum: Questions/Comments
Question: IDL code to read post processed granules
Replies: 1

IDL code to read post processed granules

Hi there, I ordered some MODIS Aqua L1B granules with the online post processing steps: only nigh data from some bands and a certain region was selected to produce. But I found the data cannot be open and read with regular IDL code like the "modis_l1b_read.pro", as the "sd" part ...
by hanzhi.lin
Thu Sep 08, 2022 11:01 am America/New_York
Forum: Questions/Comments
Question: MODIS L1A granules from OB.DAAC and LAADS
Replies: 4

Re: MODIS L1A granules from OB.DAAC and LAADS

Thanks, Sean! I should have dig one more step on google. :)
by hanzhi.lin
Wed Sep 07, 2022 5:19 pm America/New_York
Forum: Questions/Comments
Question: MODIS L1A granules from OB.DAAC and LAADS
Replies: 4

MODIS L1A granules from OB.DAAC and LAADS

Hi there, are MODIS L1A granules stored at OB.DAAC the same with those from LAADS? When I googled my question, I found a document saying the L1As at OB are a "reduced" version of standard L1As: http://oceancolor.gsfc.nasa.gov (.reprocessing/r2009/band_subsettted_level1a/) But since this do...