Search found 47 matches

by jcfischer
Mon Feb 05, 2018 1:59 pm America/New_York
Forum: Questions/Comments
Question: Map coefficient of variation (CV) and standard deviation (STD)
Replies: 4

Map coefficient of variation (CV) and standard deviation (STD)

Dear Sean, I thank you for the answer! This is very helpful. The way to calculate the coefficient of variation is nevertheless not that handy... I would like to do this all in one. This might be easier using R? Did anybody map the mean, the standard deviation and the coefficient of variation of an o...
by jcfischer
Fri Feb 02, 2018 5:17 am America/New_York
Forum: Questions/Comments
Question: Map coefficient of variation (CV) and standard deviation (STD)
Replies: 4

Map coefficient of variation (CV) and standard deviation (STD)

Dear colleagues, the command combination l2bin + l3mapgen enables the creation of level 3 mapped image files out of level 2 files. The combined run of those two commands will result in mapped images of the mean of a selected product (in my case Kd_490) representing an indicated period of time (e.g. ...
by jcfischer
Fri Feb 02, 2018 2:13 am America/New_York
Forum: Questions/Comments
Question: Display of L3m files - statistical adjustments
Replies: 4

Display of L3m files - statistical adjustments

Dear Danny, thanks for the advice! Good to know that the new version will upgrade the statistical options. What I did to solve my problem: I used the color manager and adjusted the range by lowering the max from 6.0 to 0.5. That way the differences in the Kd 490 values got way better depicted. Is th...
by jcfischer
Thu Feb 01, 2018 7:40 am America/New_York
Forum: Questions/Comments
Question: Display of L3m files - statistical adjustments
Replies: 4

Display of L3m files - statistical adjustments

Dear all, I am working with Kd_490 level 3 mapped data and face the problem that my maps barely show the spatial differences of the (relatively low) differing values. The area of interest I am looking at basically looks "all the same". Here the statistics of an example file: Minimum: 0.016...
by jcfischer
Tue Jan 30, 2018 7:47 am America/New_York
Forum: Questions/Comments
Question: Nomenclature MODIS files
Replies: 5

Nomenclature MODIS files

So it is A-year-day-hour-minute-second.level_Lac_
Thank you very much for the clarification!
by jcfischer
Tue Jan 30, 2018 7:40 am America/New_York
Forum: Questions/Comments
Question: Clipping of MODIS L3m file according to Shapefile
Replies: 5

Clipping of MODIS L3m file according to Shapefile

Dear colleagues, I would like to know whether there is an option in SeaDas to crop a level 3 mapped image file (in netCDF format) from MODIS by using the spatial information of a shapefile as a reference. The area of interest of my study is defined as a 200 nautical mile (~370.4 km) buffer zone arou...
by jcfischer
Tue Jan 30, 2018 5:37 am America/New_York
Forum: Questions/Comments
Question: Nomenclature MODIS files
Replies: 5

Nomenclature MODIS files

Hi, I have a question regarding the nomenclature of MODIS files: let´s for example look at the files representing the first of January 2004: A2004001103000.specific-ending. What does the "A" stand for? "2004" represents the year 2004 and the following "001" represents t...
by jcfischer
Tue Jan 30, 2018 4:52 am America/New_York
Forum: Questions/Comments
Question: Binning of MODIS L2 files
Replies: 4

Binning of MODIS L2 files

Dear Danny, thank you very much for your answer! I ran the l2bin command for a test month (07.2002) three times with the prodtype set one time to "day", one time to "8-day" and another time to "month". All other settings (sday=blank, eday=blank, resolve=1, suite=blank, ...
by jcfischer
Tue Jan 30, 2018 4:01 am America/New_York
Forum: Questions/Comments
Question: Product Information Kd_490
Replies: 3

Product Information Kd_490

Dear both, thank you very much for the answers! Those publications are very useful. In fact, I realized that only a little fraction of my area of interest consists of shallow waters, sandy sea floor and reefs. La Réunion is characterized by a very steep bathymetry, the water is deep just off the coa...
by jcfischer
Fri Dec 15, 2017 10:49 am America/New_York
Forum: Questions/Comments
Question: Binning of MODIS L2 files
Replies: 4

Binning of MODIS L2 files

Dear all, in my long-term study of the coastal water turbidity around La Réunion, I need to develop a way to pool/goupe the satellite imagery data in order to be able to analyze it. I am looking at trends in the turbidity including all available MODIS Aqua data from 2002 until present. This encompas...