The Orbcomm launch is on for 1900 UTC Tuesday. The Orbcomm satellites will be transmitting on the Gateway Transmitter (57.6 kbps OQPSK on 137.56 MHz). This is a LOW POWER transmitter...approx 2 watts, or so I'm told. Early listeners should hear the 1/16th second bursts in a random order. Until the satellites cross into the USA (and connect to a US gateway) they will not be synchronized and will be transmitting randomly. After they are synched, you will hear them in a rat-a-tat manner, one after the other. Good Luck...and let us know what you hear! Eric -- Eric Rosenberg Orbcomm Global LP rosenberg.eric@orbcomm.com