I am currently doing a research in Marine protected areas (MPA), calculating Chlorophyll concentration through remote sensing.
I started using Terra Modis data but I dont know which of the 2 types I should use. OCX Algorithm OR OCI?
Also I read some papers referring that (OCI) algorithm is a hybrid between a bandâ€difference color index algorithm for lowâ€Chl waters
and the traditional bandâ€ratio algorithms (OCx) for higherâ€Chl waters. Does that mean that OCI contains OCX alogorithm with some more information? I am a little bit confused there.
When I used the OCX Algorithm the size of the file is 5 to 6 times bigger than OCI. Does that mean OCX Algorithm contains more information about variation?
Which of the 2 types should I use in my research and what type is the newest containing more information?
I do not understand your statement that the OCX file size is 5 to6 times bigger than OCI, as OCI includes OCX, but switches to the band difference algorithm below concentrations 0f 0.15 mg m^-3, using a weighted average between 0.15 and 0.2 mg m^-3 and is OCX-only above 0.2 mg m^-3 .
When I said about the file I meant that the size of OCX (netCDF) is 300 MB (megabytes) while OCI is 40-50MB (megabytes) and I thought the bigger the file the more information will be included.
I will use OCI.
- Subject Matter Expert
- Posts: 211
- Joined: Thu Mar 05, 2009 10:25 am America/New_York