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Um, strike that image.  I just realized I didn't leave out the "no data" areas.
I'll have another look at this tomorrow, but if you could provide any additional
details in the mean time, that might help make sure I am looking in the
right place.

Norman

Hi Robert,I just computed the difference in the adg_443 values from these two files.A20193292019336.L3m_8D_IOP_adg_443_giop_4km.ncA20193372019344.L3m_8D_IOP_adg_443_giop_4km.ncI got a global field that looks like the attached image where red regions have higheradg in the first 8-day period and blue ...

I don't know what you consider high resolution, but the NASAEarthData folks have a WorldView browser that covers resolutionsdown to roughly 500-meter pixels.https://worldview.earthdata.nasa.gov/The Europeans have a browser for their Sentinel-2 data which have10-meter resolution.https://apps.sent...

Hi Eligio,

As far as I am aware, we do not distribute SMI count files.
Which SMI files are you using?   If you want a proper image
showing the valid number of observations at any location,
then you should be using the L3 bin files as Don and George
suggested.

Regards,
Norman

Hi,

MODIS data have a maximum resolution of 250 meters (at nadir,
for just two bands).  The resolution is limited by the hardware flying
in space.  Representing MODIS data at 30-meter resolution is just
creating data.

Regards,
Norman

OK. Great.

Norman

Hi,

Could you please give us some additional information?
You will find some instructions here.

https://oceancolor.gsfc.nasa.gov/forum/oceancolor/topic_show.pl?tid=6447

Thanks,
Norman

Our firewalls do impose automatic blocks on IP addresses thatexceed certain limits.  You may email connection_problems@oceancolor.sci.gsfc.nasa.govand provide the information described in the following post ifyou think this may have happened to you.https://oceancolor.gsfc.nasa.gov/forum/oceanco...

Assuming you have the network bandwidth, a faster way could be
to just download the unextracted VIIRS files and do the extractions
yourself on your own machine.

Regards,
Norman

It's not SeaDAS, but you could use the standard linux program, bc, like this.cat <<EOF >sample_chl_anomalies.txt0.020.0142.40.260.0890.37EOFfor c in `cat sample_chl_anomalies.txt`; do  echo "l($c)" | bc -l >> log_sample_chl_anomalies.txtdoneOr you could use my favorite, reverse-po...