Search found 47 matches

by jcfischer
Wed Feb 21, 2018 6:45 am America/New_York
Forum: Home
Question: SST anomalies
Replies: 1

SST anomalies

Dear all, I am working with MODIS Aqua SST data and detected some strange values in a particualr file (A2002192). The AOI comprises tropical waters in the Western Indian Ocean but the file shows temperatures below 0°C. Please have a look at the attached screenshot of the statistics. In order to chec...
by jcfischer
Wed Feb 21, 2018 12:40 am America/New_York
Forum: Home
Question: Filter application to Kd_490 files
Replies: 3

Filter application to Kd_490 files

Hi Sean,
thanks for the advice! Is there a study/paper on the Kd algorithm failing in shallow waters available in addition to those mentioned here (https://oceancolor.gsfc.nasa.gov/atbd/kd_490/) under references?
Thank you! Greetings, JC
by jcfischer
Wed Feb 21, 2018 12:24 am America/New_York
Forum: Home
Question: MODIS "Missing datas"
Replies: 5

MODIS "Missing datas"

Thanks for this link! Good to know what happened in these respective time periods.
Greetings, JC
by jcfischer
Thu Feb 15, 2018 12:10 am America/New_York
Forum: Home
Question: MODIS "Missing datas"
Replies: 5

MODIS "Missing datas"

Dear all,I am working with MODIS Aqua satellite imagery for the full period of operation of this sensor. My AOI consists of more than 500 000 square kilometers in the central Indian Ocean. The very high revisit frequency of this sensor is one of its great advantages. I realized that for the full per...
by jcfischer
Tue Feb 13, 2018 4:01 am America/New_York
Forum: Home
Question: Filter application to Kd_490 files
Replies: 3

Filter application to Kd_490 files

Dear colleagues, in Kd_490 level 2 files I have moderately high outliers in an area which is mostly flagged by the cloud-ice mask. I am looking at a tropical area and therefore know that the area is covered by clouds. The high turbidity values are supposedly caused by stray light and shadow effects ...
by jcfischer
Tue Feb 13, 2018 12:48 am America/New_York
Forum: Home
Question: Clipping of MODIS L3m file according to Shapefile
Replies: 5

Clipping of MODIS L3m file according to Shapefile

Dear both, that solved my problem - thank you very much!
What is the planned release date for version 7.5?
by jcfischer
Tue Feb 13, 2018 12:44 am America/New_York
Forum: Home
Question: Binning of MODIS L2 files
Replies: 4

Binning of MODIS L2 files

Dear Danny, this is good to know, thanks for clarifying! That way I was able to create 8day, monthlies and annual mean files.
by jcfischer
Tue Feb 13, 2018 12:39 am America/New_York
Forum: Home
Question: Map coefficient of variation (CV) and standard deviation (STD)
Replies: 4

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

Thanks for answering and providing all the useful information!
I need to produce images of the vlaues of the standard deviation and managed to do this with the raster and ncdf4 library in R.
Greetings, JC
by jcfischer
Tue Feb 13, 2018 12:30 am America/New_York
Forum: Home
Question: Nomenclature MODIS files
Replies: 5

Nomenclature MODIS files

Thanks! Don´t know how I missed that.
by jcfischer
Tue Feb 13, 2018 12:29 am America/New_York
Forum: Home
Question: Display of L3m files - statistical adjustments
Replies: 4

Display of L3m files - statistical adjustments

Thank you very much for answering. I adjusted the color bar to display the data and therefore visualize the differences in a better way.
Thanks for the links to all those useful resources! Greetings, JC