Hidden flights on FR24 websites?

[Oblivian]

https://www.flightradar24.com/faq

https://www.flightradar24.com/how-it-works

http://www.rtlsdr.com/

Sent from my EML-L09 using Tapatalk

[mensa]

Very interesting!
But why is it now possible with simplest DVB-T sticks to receive all that information?
Is it legal?

[Oblivian]

Because ATC need to see them - The technology wasn't designed for public eye. It was designed for air to air safety.

What we do is a bonus of the way the system works

[mensa]

Thank you! Interesting.
But why the planes itself do send out that information which can everyone receive when they are so secret?

[LN-MOW]

They are blocked for a reason. See ‘How it works’ for explanation.

https://www.flightradar24.com/how-it-works

[mensa]

Hello,

could it be, that some flights at the FR24 websites are hidden?
I started feeding and found a flight of "Slovak Government Flying Service 2" near me using my DVB-T stick but it was not shown on FR24 website or app. Is the reason to be hidden "Government" or what?
Is there a possibility to show all flights or an overview which ones are hidden/forbidden to see?