Can anyone point me to a throrough list of acronyms and abbreviations and their definitions as transmitted by ground stations? I simply cannot find the meanings of quite a few of them. Eor example, under MFPDU I'm always seeing "TXW=0", but what is TXW? That seems to be the most difficult one, but there are many others, and they're omitted from every listing I've ssen of aeronautical terms.