l2gen error WARNING: No optimal MET files found

cliffordoo · by **cliffordoo** » Thu Jul 20, 2017 12:07 am America/New_York

Hello,

I am processing L1A MODIS Aqua files downloaded from the ladsweb. The date range and names for the files are as follows.

MYD01.A2004354.0630.006.2017188013625.hdf
to
MYD01.A2004366.0655.006.2017188011950.hdf

The coordinates for this files are 10-13N and 107-111E. This is SE coastal Vietnam

l2gen fails at the getanc.py. The getanclog file contains the following.

*** WARNING: No optimal MET files found.
*** WARNING: No optimal MET files found.
*** WARNING: No optimal SST files found.
*** WARNING: No optimal ICE files found.

*** WARNING: The following ancillary data types were missing or are not optimal: MET OZONE SST Sea Ice

I need the met files for further processing. Does this error mean, as it says, that there are no suitable MET files available and as a results the data for this 12 day period are unusable? Or, is there a problem with the processing approach? I have not come across this error with other files in 2003 and 2004, as of yet. Is there anything I can do to fix this?

Thanks for your help

Andy

OB.DAACx - SeanBailey · by **OB.DAACx - SeanBailey** » Thu Jul 20, 2017 3:11 pm America/New_York

Andy,
I grabbed our version of the first file and getanc.py returns values for all ancillary products:

$ getanc.py A2004354063000.L1A_LAC

Aqua
icefile=/accounts/sean/ocssw/var/anc/2004/354/N200435400_SEAICE_NSIDC_24h.hdf
met1=/accounts/sean/ocssw/var/anc/2004/354/N200435406_MET_NCEPR2_6h.hdf
met2=/accounts/sean/ocssw/var/anc/2004/354/N200435412_MET_NCEPR2_6h.hdf
met3=/accounts/sean/ocssw/var/anc/2004/354/N200435412_MET_NCEPR2_6h.hdf
ozone1=/accounts/sean/ocssw/var/anc/2004/353/N200435300_O3_AURAOMI_24h.hdf
ozone2=/accounts/sean/ocssw/var/anc/2004/354/N200435400_O3_AURAOMI_24h.hdf
ozone3=/accounts/sean/ocssw/var/anc/2004/354/N200435400_O3_AURAOMI_24h.hdf
sstfile=/accounts/sean/ocssw/var/anc/2004/354/N2004354_SST_OIV2AVAM_24h.nc

try again? or use our L1A files :grin:

Sean

cliffordoo · by **cliffordoo** » Fri Jul 21, 2017 1:35 am America/New_York

Thank you Sean. I will give your files a try and report back.

Andy

cliffordoo · by **cliffordoo** » Mon Dec 03, 2018 10:17 pm America/New_York

Hi Sean,

I realize that this is an old post, but thought I would still follow up. The lack of MET files still happened with the ocean color data. However, I did find this post

https://oceancolor.gsfc.nasa.gov/forum/oceancolor/topic_show.pl?tid=4623

It recommends --refreshDB with getanc.py.

That did the trick.

Andy