Wednesday, April 3, 2013

MODIS Aqua RGB with SeaDAS 7.0 Beta

Another post recording my adventures with MODIS data

Aim :  Create true colour RGB image from MODIS Level 1B

MODIS Level 1B

  • Calibrated
  • Not atmospherically corrected
Why 
  • Atmospheric Correction required for Chlorophyll Algorithms
  • RGB image required in write up
Download data Reverb NASA

  • MYD021KM.A2003359.1225.005.2003360215150.hdf
  • MYD02HKM.A2003359.1225.005.2003360215150.hdf
  • MYD02QKM.A2003359.1225.005.2003360215150.hdf
  • MYD03.A2003359.1225.005.2003360210518.hdf

  • MYD021KM - reflective bands at 1km
  • MYD02HKM - reflective bands at 500m.
  • MYD02QKM - reflective bands at 250m.
  • MYD03 - geolocation’ information required by MODIS Oceans Level 2 
    (i.e., latitude and longitude) for any remapping. 

I know all the above products can be generated from MODIS Level 1A, today I am being trying to be directed. and shall not investigate that area.

Interest link discussing how the different resolution reflective product work with the 1km resolution geolocation file. iCare MODIS_geolocation wiki

Tried to run l2gen from SeaDAS GUI -->  Issue
Known and Fixed Issues

This should have been fixed I believe.

Reinstalled SeaDAS with all modules, --> Issue
Bugger will have to understand the command line.

Back one step
Let's try l2brgen - the gui is throwing NullPointerExceptions. in the good old AWT Event Queue

DId manage to reproject through the GUI which something

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