Why don't the SMAP enhanced soil moisture products include landcover class?

While the standard SMAP Level-2 and -3 radiometer soil moisture products* contain landcover_class and landcover_class_fraction in the data files, the enhanced soil moisture products** do not. This is because the landcover class ancillary data are not available at the 9 km grid posting that the enhanced products are provided on. However, the lack of landcover class does not affect soil moisture retrieval as these data are included in the standard products for diagnostic purposes only.

* Standard SMAP Level-2 and -3 radiometer soil moisture products:

** Enhanced soil moisture products: