The Level-3 OMI NO2 product "OMNO2e" based on old Level-2 NO2 data, is not available any more from the GES DISC. Science team has released a new global gridded level3 NO2 data product ( OMNO2d
), which is based on revised NO2 algorithm.
In the past, only one Level-3 OMI NO2 product, OMNO2e, was released which contained the "average" value of all Level-2 "Good" pixels in each 0.25x0.25 deg global Level-3 grid. Recently (Jan 10, 2013) OMNO2e product has been replaced by new Level-3 product "OMNO2d" which is based on revised NO2 algorithm.The old OMNO2e data is no longer distributed from GES DISC. In the future, in addition to OMNO2d data, new OMNO2e data product will be produced which will have only one "best" observation selected from the good quality pixels that occupy the 0.25x0.25 deg grid.