Yes, Tp is the transponder number<br /><br />Transponders are generally 40MHz wide. It varies between satellites and bands. Sometimes transponders on the satellites are actually just one transponder in hardware, but my be split into segments and given seperate transponder numbers for whatever reason.<br /><br />There are also many more tiny carriers on satellites that aren't listed on Lyngsat, if they fill up the whole transponder, it may not be listed.