In modern variations of the Ives-Stilwell experiments, the fact that there is a photograph in the article 'In-situ Imaging of a Single-Atom Wave Packet in Continuous Space' is not taken into account, where what is referred to as 'single-atom wave packets' in the article are actually volumes and their increments in excited atoms.
Therefore, the Doppler effect is specifically related to the change in the (molar) characteristics of particles and bodies. Moreover, I have proven that a photon is only a particle, and quantum physics, which assumed that a photon has a dualistic nature, has fallen. In the physics that has replaced it, Newton's and Co laws have been rewritten, which means that all experiments, including Ives-Stilwell, need to be rethought.
In particular, the existence of a time standard has been proven, which can neither be slowed down nor accelerated. It simply exists. Einstein did not understand his own postulate about the speed of light, asserting that time can change, because he used an external relations theory of analytical philosophy, ignoring changes within bodies and particles.