If you enter BAPI_FIXEDASSET_CREATE1 AS01 into the search box on top right of the forum, then you get 52 hits for this combination.
Just read a few of them and you have the answer to your question
Further enter BAPI_FIXEDASSET_CREATE1 in SE37, click display, then the button for documentation.
If you see the same like I do then you get to see: You can use this method to create asset master records.