Search found 141 matches

by OB WebDev - norman
Tue Apr 02, 2019 8:58 am America/New_York
Forum: Home
Question: SeaWiFS. Estimate average chlorophyll
Replies: 9

SeaWiFS. Estimate average chlorophyll

Volume 32 of the SeaWiFS Prelaunch Technical Memorandum series, where the binningscheme we use was first described, does indicate that data should be log-transformedbefore they are binned.  Even before the SeaWiFS mission got underway, however,the log transformations and maximum likelihood esti...
by OB WebDev - norman
Mon Apr 01, 2019 11:30 am America/New_York
Forum: Home
Question: SeaWiFS. Estimate average chlorophyll
Replies: 9

SeaWiFS. Estimate average chlorophyll

To get the variance, you need to divide the "sum_squared" value by the "weights"value and then subtract the square of the mean from that.NormanP.S.  Note that rounding errors can sometimes cause the variance to goslightly negative when you subtract the mean squared.  In...
by OB WebDev - norman
Mon Apr 01, 2019 11:17 am America/New_York
Forum: Home
Question: SeaWiFS. Estimate average chlorophyll
Replies: 9

SeaWiFS. Estimate average chlorophyll

Hi,To get the mean values you need to divide each "sum" value  by the corresponding"weights" value.  You will find those two data sets in two different places in thelevel-3 file.h5dump -A S19980011998031.L3b_MO_CHL.nc |grep -A 8 BinList|head -8      DATAS...
by OB WebDev - norman
Wed Mar 06, 2019 1:22 pm America/New_York
Forum: Home
Question: SeaDAS Seminars at NASA?
Replies: 1

SeaDAS Seminars at NASA?

Hi Bianca,

The SeaDAS team is located at the Goddard Space Flight Center in Maryland,
not at Johnson in Houston.

You can find some webinars and SeaDAS tutorials that you may find useful here.

https://www.youtube.com/user/nasaoceancolor

Regards,
Norman
by OB WebDev - norman
Fri Dec 21, 2018 2:15 pm America/New_York
Forum: Home
Question: Image pixels
Replies: 2

Image pixels

Hi Naveed,

HICO and MODIS have different spatial, spectral, and temporal resolutions,
but it is possible for both data sets to read the images pixel by pixel.
I'm afraid I don't know what you mean by "pins", however.

Norman
by OB WebDev - norman
Fri Dec 21, 2018 9:17 am America/New_York
Forum: Home
Question: IP blocked
Replies: 14

IP blocked

Jun,The following from our system administrators:     Jun's ips were on multiple block lists. I removed the entries and     Jun's ips are now connectiong to oceandata according to the logs.     xx.xxx.xx.xx     xx.xxx.xx.xxYou may g...
by OB WebDev - norman
Thu Dec 20, 2018 10:46 am America/New_York
Forum: Home
Question: IP blocked
Replies: 14

IP blocked

Jun,

Our systems folks say that "xx.xxx.xx.xx was temporarily
blocked yesterday. They were automatically unblocked this
morning at 5am."

If you are using accelerators or running aggressive scripts, you
may wish to tune them so as to avoid recurrence of the blocks.

Regards,
Norman
by OB WebDev - norman
Wed Dec 19, 2018 11:00 am America/New_York
Forum: Home
Question: Rayleigh correction
Replies: 8

Rayleigh correction

Note the "s".
by OB WebDev - norman
Wed Dec 19, 2018 10:54 am America/New_York
Forum: Home
Question: IP blocked
Replies: 14

IP blocked

Hi Jun,

You will need to provide a public IP address for us to check.
https://www.google.com/search?&q=what+is+my+ip

Please see the following for help diagnosing your problem.

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

Regards,
Norman
by OB WebDev - norman
Wed Dec 19, 2018 9:06 am America/New_York
Forum: Home
Question: Rayleigh correction
Replies: 8

Rayleigh correction

Hi Rani,I suggest you have a look at some of the introductory videos that the SeaDASfolks put together to get you started.https://seadas.gsfc.nasa.gov/tutorials/video_tutorials/There is also a good collection of help pages available for the various SeaDASprograms.https://seadas.gsfc.nasa.gov/help/Re...