NASA

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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.
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Most of communications NASA does with airplanes and spacecraft happen on [[VHF_airband|VHF]], [[VHF_/_UHF_Radio|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).
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).
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! Frequency !! Last heard !!  Notes
! Frequency !! Last heard !!  Notes
|-
|-
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| 2764 || ||
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| 2764 kHz || ||
|-
|-
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| 2836 || ||
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| 2836 kHz || ||
|-
|-
-
| 3041 || ||
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| 3041 kHz || ||
|-
|-
-
| 3120 || ||
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| 3120 kHz || ||
|-
|-
-
| 3187 || ||
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| 3187 kHz || ||
|-
|-
-
| 3365 || ||
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| 3365 kHz || ||
|-
|-
-
| 4993 || ||
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| 4993 kHz || ||
|-
|-
-
| 5011 || ||
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| 5011 kHz || ||
|-
|-
-
| 5180 || ||
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| 5180 kHz || ||
|-
|-
-
| 5246 || ||
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| 5246 kHz || ||
|-
|-
-
| 5711
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| 5711 kHz
| February 2010 ||
| February 2010 ||
|-
|-
-
| 5810
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| 5810 kHz
| August 2009  
| August 2009  
| Briefly, co-channel with a broadcaster
| Briefly, co-channel with a broadcaster
|-
|-
-
| 6751
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| 6751 kHz
| August 2009 ||
| August 2009 ||
|-
|-
-
| 6897 || ||
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| 6897 kHz || ||
|-
|-
-
| 6937 || ||
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| 6937 kHz || ||
|-
|-
-
| 7525 || ||
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| 7525 kHz || ||
|-
|-
-
| 7765 || ||
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| 7765 kHz || ||
|-
|-
-
| 7833  
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| 7833 kHz
| August 2009
| August 2009
|
|
|-
|-
-
| 9043
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| 9043 kHz
| February 2010
| February 2010
|
|
|-
|-
-
| 9132
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| 9132 kHz
| July 2009
| July 2009
|
|
|-
|-
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| 10780
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| 10780 kHz
| October 2009
| October 2009
|
|
|-
|-
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| 11104
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| 11104 kHz
| October 2009
| October 2009
|
|
|-
|-
-
| 11205 || ||
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| 11205 kHz || ||
|-
|-
-
| 14973 || ||
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| 14973 kHz || ||
|-
|-
-
| 17780 || ||
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| 17780 kHz || ||
|-
|-
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| 20185.6 || ||
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| 20185.6 kHz || ||
|-
|-
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| 20390 || ||
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| 20390 kHz || ||
|}
|}

Latest revision as of 20:08, 31 January 2019

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

Space Shuttle SRB recovery ship comms
Frequency Last heard Notes
2764 kHz
2836 kHz
3041 kHz
3120 kHz
3187 kHz
3365 kHz
4993 kHz
5011 kHz
5180 kHz
5246 kHz
5711 kHz February 2010
5810 kHz August 2009 Briefly, co-channel with a broadcaster
6751 kHz August 2009
6897 kHz
6937 kHz
7525 kHz
7765 kHz
7833 kHz August 2009
9043 kHz February 2010
9132 kHz July 2009
10780 kHz October 2009
11104 kHz October 2009
11205 kHz
14973 kHz
17780 kHz
20185.6 kHz
20390 kHz


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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