On Tuesday, 23 June 2009, NOAA will implement the following VTX configuration
changes:
 

NOAA 18 frequency change from 137.1000 to 137.9125 MHz on orbit 21088, VTX1 to VTX2.

NOAA 19 frequency change from 137.9125 to 137.1000 MHz on orbit 1936, VTX2 to VTX1.

Recommended info page @ http://tech.groups.yahoo.com/group/weather-satellite-reports/