The key to understanding the abstract lies in the concept of micro-movements and how they are detected and analyzed using Synthetic Aperture Radar (SAR). Here's a breakdown:

1. What Are Micro-Movements?
Micro-movements are tiny, often imperceptible vibrations or displacements occurring on or within a structure. In the context of the Great Pyramid of Khnum-Khufu, these micro-movements are generated by background seismic waves, which naturally travel through the Earth's crust. These could come from:

Seismic activity (natural earth tremors)
Atmospheric infrasound (low-frequency pressure waves)
Human activity (distant traffic, machinery, etc.)
The key is that these vibrations, although minimal, propagate through the structure and slightly shift or deform the material — including any hidden chambers or anomalies inside the pyramid.

2. How Are Micro-Movements Detected?
Synthetic Aperture Radar (SAR) is a remote sensing technology that uses radar signals from satellites (in this case, the COSMO-SkyMed satellite system) to create high-resolution images. Here's how it works in this context:

SAR emits radar waves toward the pyramid.
The radar signals bounce back with slight variations depending on surface or internal movement.
Multiple SAR images are collected over time, capturing repeated reflections.
Micro-movements cause slight phase shifts in the returning radar signals.
By analyzing changes in the radar signal's phase over time, scientists can detect tiny vibrations — measured in millimeters or even smaller — indicating movement from within the structure.

3. Why Analyze Micro-Movements?
The theory is that different materials and empty spaces (such as chambers or tunnels) will respond differently to seismic waves. When these waves travel through the pyramid:

Solid blocks vibrate in one way.
Empty spaces or different materials (e.g., sand, gravel, or constructed chambers) vibrate in another way.
By analyzing the pattern of these micro-movements, researchers can create a 3D tomographic image of the pyramid's internal structure — essentially "seeing" inside without drilling or excavation.

4. What Makes This Novel?
Traditionally, SAR struggles to penetrate solid structures. However, by focusing on the micro-movement domain rather than relying on direct penetration:

The pyramid appears "transparent" because its internal structures generate distinguishable movement patterns.
Previously unknown chambers or objects can be inferred from the way the structure vibrates.
This technique is somewhat analogous to ultrasound imaging, but instead of sound waves, it uses radar and seismic-induced vibrations.

5. Results Claimed by the Paper
The authors claim to have completely reconstructed internal objects, including structures that had never been discovered.
This suggests the possibility of finding new chambers or architectural features within the Great Pyramid.
They also describe this as high-resolution, full 3D tomography, meaning the internal image is detailed enough to differentiate materials or empty spaces.