TANT1 requests that SCHED turn on antenna temperature measurement at stations in the TANTSTA1 list, if it knows how to do so for those antennas. TANT2 does the same thing for stations in the TANTSTA2 list.
This command currently has no effect on VEX, VLA, or VLBA output. In fact, as more antennas have gone to the above file types, the usefulness of this capability had been significantly reduced. As of mid 1997, the only station for which automatic Tant requests can be made is Green Bank. Be warned that such measurements take a minute or so.