Search found 14 matches

by machl
Fri Jul 19, 2024 1:27 pm America/New_York
Forum: Home
Question: Error at calibrate_viirs while processing VIIRS-JPSS1 data
Replies: 6

Re: Error at calibrate_viirs while processing VIIRS-JPSS1 data

Sorry, the error messages appear when run geolocate_viirs, not calibrate_viirs.

here is the code:
$geolocate_viirs ifile=$inpath$l1asub_fname geofile_mod=$inpath$geosub_fname
by machl
Fri Jul 19, 2024 8:50 am America/New_York
Forum: Home
Question: Error at calibrate_viirs while processing VIIRS-JPSS1 data
Replies: 6

Re: Error at calibrate_viirs while processing VIIRS-JPSS1 data

OB ODPS - towens wrote: Fri Jul 19, 2024 7:25 am America/New_York Check the existence of /ocssw/var/viirsn/polar_wander.ascii in your SeaDAS installation.

Tommy
Hello,
Tommy, I have checked, and the file exists. SeaDAS 7.5 was used.
by machl
Fri Jul 19, 2024 7:13 am America/New_York
Forum: Home
Question: Error at calibrate_viirs while processing VIIRS-JPSS1 data
Replies: 6

Re: Error at calibrate_viirs while processing VIIRS-JPSS1 data

I encountered the same problem when processing viirs/snpp data using calibrate_viirs. And the codes run well for data before SNPP_VIIRS.20230318T053600.L1A.nc, but failed after SNPP_VIIRS.20230318T053600.L1A.nc till now (such as SNPP_VIIRS.20230320T064200.L1A.nc). The l1a data were downloaded from h...
by machl
Tue Jun 04, 2024 8:34 am America/New_York
Forum: Home
Question: MODIS/Aqua-derived PAR data have many plaids
Replies: 3

Re: MODIS/Aqua-derived PAR data have many plaids

Dear Sean,

Thank you very much for your helpful answer, as shown in the attached picture, I am curious why the west region seems not affected by patchwork.
Many thanks for your kind help.
by machl
Sun Jun 02, 2024 9:47 am America/New_York
Forum: Home
Question: MODIS/Aqua-derived PAR data have many plaids
Replies: 3

MODIS/Aqua-derived PAR data have many plaids

Hello, I used l2gen to process MODIS/Aqua L1A data to L2 data, all parameter settings were default, but the L2 PAR data have a lot of  plaids (an example is attached). How can I solve this problem? What's more, the values of our L2 PAR data were about 10 einstein m-2 day-1 less than the L3 PAR data ...
by machl
Wed May 08, 2024 12:55 am America/New_York
Forum: Home
Question: unable to download MODIS L1A data using wget
Replies: 1

Re: unable to download MODIS L1A data using wget

Here is an example of run log: HTTP request sent, awaiting response... 302 FOUND Location: https://oceandata.sci.gsfc.nasa.gov/getfile/A2024127062000.L1A_LAC.bz2 [following] --2024-05-08 12:39:53-- https://oceandata.sci.gsfc.nasa.gov/getfile/A2024127062000.L1A_LAC.bz2 Reusing existing connection to ...
by machl
Wed May 08, 2024 12:50 am America/New_York
Forum: Home
Question: unable to download MODIS L1A data using wget
Replies: 1

unable to download MODIS L1A data using wget

Hello, I used the following code to download MODIS/AQUA L1A data from July 2023 to May 2024: wget --user=[my account] --password=[my password] --auth-no-challenge https://oceandata.sci.gsfc.nasa.gov/getfile/A2024127062000.L1A_LAC.bz2 However, all data cannot be downloaded completely and usually brea...
by machl
Tue Dec 22, 2020 6:42 am America/New_York
Forum: Home
Question: How to properly mask cloud shadow
Replies: 2

How to properly mask cloud shadow

Thank you, I read the paper you recommended. It is a very wonderful paper, but the method of the paper is complicated to me. Finally, I removed the cloud shadow through visual interpretation.
by machl
Wed Dec 02, 2020 8:51 am America/New_York
Forum: Home
Question: How to properly mask cloud shadow
Replies: 2

How to properly mask cloud shadow

Hi,Everyone, when I processed MODIS-Aqua (such as A2002351 and A2002324), I used the default nlwmin parameter (0.15) in the l2gen step, and then performed l2bin, l3mapgen, the flags used in l3mapgen including LAND,STRAYLIGHT, CLDICE, ATMFAIL, HIGLINT, MODGLINT, HISATZEN, HISOLZEN, LOWLW. But the clo...
by machl
Wed Nov 18, 2020 3:51 am America/New_York
Forum: Home
Question: modis_GEO.py failed for some images
Replies: 4

modis_GEO.py failed for some images

Thank you~ This solution also worked:grin:

Thunder