(), shortwave; optimized version (Seiji Kato, personal communication, 2003);
please note that kato2 only has 148 subbands (that is, calls to the rte_solver)
compared to 575 for kato which translates to a decrease in computational speed by
up to a factor of 4 with only little increase in uncertainty. The absorption data are
based on HITRAN 2000. Please note that the bands above 2.5 micrometer are not very reliable which,
however, this has only little impact on integrated shortwave radiation.
Jonas Kylling
2010-03-06