https://www.space.com/space-exploration/satellites/its-quite-a-bit-more-than-we-expected-satellite-reveals-immense-scale-of-gps-signal-tampering

Who's jamming GPS?

Xona's satellites will use a similar signal, but one that's 100 times stronger, to offer greater resiliency against such deliberate interference. But the Pulsar-0 spacecraft also carries a GPS receiver to make sure the two systems will be able to work together. When the Xona team first turned on that receiver a few months after Pulsar-0's launch last year, they were shocked by the scale of signal degradation the receiver was reporting above Europe and parts of the Middle East.

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Hello? Here are people living, on the planet known as Earth...
Are you sure it's safe to turn your machinery on "x100 times" of power?
Do you even care about human safety in these frequencies ever?

is signal strength just higher volume?

they

It's likely a higher amplitude, that is. In radio, normally, the electricity current.
Yes, it may be related to the sound signal volume indeed.

Yet, hardware or a human, as a recipient has limits in terms of amplitude, the current, and either ears may get damaged, or brain get fried, or worse, unfortunately.

Six men are likely to have been accidentally exposed to high levels of very high frequency (VHF) radiofrequency radiation (100 MHz) while working on transmission masts; four men in one incident and two in another.

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Human cells die at about 107 degrees Fahrenheit or above, and when contact is made with a strong RF transmitting element the tissues near the point of contact rapidly heat well above this level. In severe cases this can cause an RF burn.

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For example, Russian jammers have been disrupting GNSS signals along Russia's western borders, officially to protect the country from Ukrainian drone attacks. Every month, this interference affects tens of thousands of flights that cruise over the region. The warring parties in the Middle East, too, use jamming and spoofing to deflect drone attacks and hide the positions of illegal ships at sea.

Dark helmet

Another one, one of my favourite websites https://gpsjam.org/

The transmit power of these satellites is on the order of 200W, so 100x more would be 20kW, so about the same as a TV transmitter. And you can drive right past a TV transmitter, whereas satellites are thousands of miles away in space, and the received power here on earth is a fraction of the emitted power.

Thank you for the clarification, with more insight!

I get that these lack the energy required to break chemical bonds, alter DNA, or cause damage to brain tissue etc.
The radio waves still pass through a human body, and the energy absorbed cannot cause thermal tissue heating, but...
There are cases I know, from personal life while working at military, of people who worked at military radio stations, including on-ground based jammers with more powerful emitters, got horrible lethal unfortunate accidents... which I'll never forget...

What if we consider radio signal reflections and the changes in the radio environment? Would these interference cause radio difference enough to cause unpredictable issues on the radio perception/safety for human?

This is accurate. RF burn sucks but you've got to be touching a powerful transmitter, and pray you're not wearing jewelry.

It's raspberry, sir.

you need to learn about inverse square law.

Thank you for the reminder! Yes, I recall the law learned around two decades ago alongside the waveguides and reflectors.
And I'll try refreshing the knowledge with more time available.

Only one man would dare to give me the raspberry...

way better