They say that SPLT is not available and they mention ALT as an output option. But the schema for model_settings.json shows that plt_sample (SPLT) is available. It also mentions alt_meanonly which is missing from the docs and spec and alt_period which should presumably be named PALT for consistency with the other outputs (that's what's used in this other docs page).
The docs and the spec are quite out of date.
They say that SPLT is not available and they mention ALT as an output option. But the schema for model_settings.json shows that
plt_sample(SPLT) is available. It also mentionsalt_meanonlywhich is missing from the docs and spec andalt_periodwhich should presumably be namedPALTfor consistency with the other outputs (that's what's used in this other docs page).