# What are the rectangular wires around Atlas V launch site?

You can see those wires spanning between four towers directly around the rocket in the following screenshot (taken from this video). I assume they are some kind of antenna or for some kind of measurement. I have also seen this setup in at other rocket launches. Can anyone tell what it is there for?

• Like the towers around: Lightning rods. Commented Mar 25, 2016 at 17:34
• Is there a reason some sites do have those and others do not? Commented Mar 25, 2016 at 17:34
• Mainly geometrical reasons - the rocket must not be the highest point within some area. If the towers are tall enough or close enough the wires are not needed. Same if the weather is reasonably stable at the launch side. Commented Mar 25, 2016 at 17:37
• If these were antennas, the frequencies involved would be in the MF or low HF range (up to a few MHz). Outside of specialty applications, that frequency range isn't in common use any longer. To a first order approximation, if these were antennas they would probably be half-wavelength or one-wavelength loops. $\lambda = \frac{c}{f}$ and you do the math if you think that's plausible. :)
– user
Commented Mar 29, 2016 at 15:31
• @MichaelKjörling That is actually a quite nice way of looking at it and totally makes sense, thank you=) Commented Mar 29, 2016 at 17:36