Most of communications NASA does with airplanes and spacecraft happen on VHF, UHF and higher frequencies. However, during every space shuttle launch, there are HF communications between Cape Radio, the Booster Recovery Director and the Solid Rocket Booster (SRB) recovery ships Freedom Star and Liberty Star.
There is a long list of possible frequencies for these communications, but only a few of these have been heard in 2008 and 2009. Those have been marked with a *. Communications are in USB mode, in voice as well as ALE data bursts (automatic link establishment).
List of SRB recovery HF frequencies
|5711 kHz||February 2010|
|5810 kHz||August 2009||Briefly, co-channel with a broadcaster|
|6751 kHz||August 2009|
|7833 kHz||August 2009|
|9043 kHz||February 2010|
|9132 kHz||July 2009|
|10780 kHz||October 2009|
|11104 kHz||October 2009|
These frequencies are also used by other users of the shortwave spectrum, so take your time to confirm that you are really hearing NASA.
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