Hidden structure found with Lidar under the Pyramids using SAR Scan Project

[NidarNidar]

I did a deep drive, originally thinking this was a hoax, but it turns out it's real, the tech isn't new but was adapted for use to use satellite scans, it's called SAR Doppler Tomography and was used previously to scan volcanoes, the two Italians adapted it for use on archaeological sites.

This doesn't require any permission and opens up a whole new world for archaeologists.

On March 16th, 2025, an interdisciplinary team of researchers announced a groundbreaking discovery beneath Egypt’s Giza Plateau: a vast complex of underground chambers and shafts extending nearly two kilometers under the famous pyramids. The team – consisting of Professor Corrado Malanga, Dr. Filippo Biondi, and Dr. Armando Mei – utilized advanced radar imaging technology to “see” almost 2 miles (approximately 3 km) below ground without excavation. In the press release, Malanga, Biondi, and Mei unveiled high-resolution 3D radar scans purportedly showing multiple levels of unknown structures hidden deep below the Great Pyramids. These findings could revolutionize our understanding of ancient Egyptian engineering and lend credence to long-standing legends of hidden chambers at Giza.

I have been in contact with one of the team members and have viewed the entire symposium and can say the presentation was professional and a landmark. I am working on a specific AI model to assist in producing higher-resolution images and to have higher discrimination between different types of Doppler effects (see below for more details on what this means).


How is it possible to “see” this deep underground? To probe beneath the pyramids, the team employed cutting-edge Synthetic Aperture Radar (SAR) imaging combined with a novel Doppler tomography technique. SAR is a form of radar remote sensing that uses the motion of a radar antenna (often on a satellite or aircraft) to simulate a large antenna aperture, yielding very high-resolution images. In this case, radar satellites – including Italy’s COSMO-SkyMed constellation and data from Capella Space – were used to scan the Giza pyramids from orbit. These satellites operate in the X-band frequency (~9.6 GHz, with ~3 cm wavelength), which provides fine image detail. Typically, radar signals at such high frequency penetrate only a few meters into dry ground at best, meaning conventional SAR would only map surface features. The key innovation by Biondi and Malanga was to overcome this limitation by analyzing the micro-vibrations of the structures rather than relying on direct wave penetration.

Advanced Radar Technology: Scanning Deep Beneath Giza

The radar technique – described in a 2022 Remote Sensing journal paper – exploits the natural, tiny vibrations of the pyramid and subsurface rock induced by ambient seismic waves (essentially the “background hum” of the Earth). As seismic energy passes through and around the pyramids, it causes microscopic movements (on the order of millimeters or less) in both solid rock and any voids (empty spaces) underground. The SAR satellites, imaging the site repeatedly, can detect these micro-movements as subtle phase shifts or Doppler frequency shifts in the radar echoes.

In effect, the pyramids and subsoil were rendered transparent when observed in the micro-motion domain. The SAR system operated at X-band, a high-frequency radar known for high imaging resolution. While such high-frequency signals do not directly penetrate kilometers of rock, the team’s method sidestepped this by using the radar to sense surface displacements caused by deeper phenomena. Each radar image was processed using a multi-chromatic analysis (MCA) that split the radar data into many narrow Doppler sub-bands.

By tracking minute Doppler shifts (so-called micro-Doppler effects) induced by vibrating targets, the algorithm inferred the presence of cavities or structures affecting the vibration modes. This approach is akin to medical ultrasound or sonar in concept but uses radar waves and naturally occurring seismic “noise” as the source of illumination. By combining multiple viewing angles and repeated passes, the team achieved a full 3D underground imaging (tomography) with meter-scale resolution. As the researchers describe, “Khnum-Khufu (the Great Pyramid) becomes transparent when observed in the micro-movement domain”, allowing high-resolution reconstruction of internal objects.

 

[NidarNidar]

The Deeper Technical Aspects OF SAR

SAR hinges on the coherent processing of sequential radar echoes to extract not only conventional reflectivity data but also the subtle phase modulations induced by micro-vibrations. In a standard SAR system, each radar pulse impinging on a target returns with a phase given by the relationship \phi = \frac{4\pi R}{\lambda}, where R is the instantaneous range to the target and \lambda is the radar wavelength. For stationary targets, phase differences across successive pulses primarily encode range and azimuth information. However, when a target exhibits even minuscule oscillatory motion (on the order of micrometers), these micro-vibrations induce an additional time-varying phase term, effectively modulating the return signal with a Doppler shift f_d = \frac{2v}{\lambda}, where vis the instantaneous velocity component along the line-of-sight.
To capture these subtle effects, the processing pipeline incorporates a time-frequency analysis step—typically using a Short-Time Fourier Transform (STFT) or wavelet decomposition—to decompose the received signal into narrow Doppler sub-bands. This approach allows for the resolution of frequency shifts that are several orders of magnitude smaller than the primary radar frequency, reaching sub-Hertz sensitivity. By segmenting the continuous stream of data and computing the spectral content in each window, the system can isolate the micro-Doppler signatures that arise from the vibrational dynamics of subsurface structures. These signatures, often masked by the dominant returns from static targets, are enhanced through coherent integration across multiple radar passes, thereby improving the signal-to-noise ratio.
Once the micro-Doppler spectra are obtained, advanced tomographic reconstruction techniques come into play. The algorithms effectively solve an inverse problem: using the measured Doppler-induced phase shifts, they reconstruct a three-dimensional map of reflectivity and vibration characteristics. Methods such as filtered back projection or iterative reconstruction algorithms are used to combine the Doppler data from various viewing angles, yielding a volumetric image of the subsurface. This reconstruction is sensitive enough to discern discontinuities—such as voids or man-made chambers—that disrupt the otherwise uniform vibrational profile of solid rock. The integration of multi-aperture data further refines depth resolution, as differences in viewing geometry help resolve ambiguities inherent in single-pass measurements.
The fusion of high-resolution SAR imaging with micro-Doppler analysis transforms what is traditionally considered noise into a rich, actionable signal. By accurately quantifying minute phase shifts due to micro-vibrations and integrating them over time and space, this technique enables the detection of structures deep beneath the surface—well beyond the direct penetration limits of conventional radar wavelengths. This method not only enhances the effective depth range of SAR but also offers a robust tool for non-invasive subsurface imaging, as demonstrated in the pioneering research conducted at the Giza Plateau.

In addition to the innovative techniques developed by Malanga, Biondi, and Mei, a recent SSRN study (https://papers.ssrn.com/sol3/papers.cfm?abstract_id=4576672) provides strong theoretical backing for their approach. This paper demonstrates that even the faint vibrational signals—generated when ambient seismic energy interacts with large stone structures—can produce measurable resonant frequencies in synthetic aperture radar (SAR) data. The SSRN research shows that by harnessing both the amplitude and phase information from these micro-vibrations, advanced signal processing techniques such as Doppler tomography can distinguish between natural geological features and deliberate, man-made voids. This theoretical framework validates the feasibility of detecting deep, subtle structural variations at depths approaching two miles, thereby supporting the method used to image the Giza Plateau’s subterranean network.

Moreover, the SSRN study underscores the importance of leveraging minute phase shifts in radar echoes to achieve high-resolution subsurface imaging. The authors detail how even barely perceptible shifts in SAR data—often considered noise in conventional analysis—can be extracted and amplified through sophisticated Doppler-based algorithms. This is directly analogous to the technique employed by the Giza research team, where continuous satellite passes capture the vibrational “signature” of the pyramids and the surrounding geology. By comparing these theoretical predictions with the observed micro-vibration patterns beneath Giza, the SSRN findings provide a robust, mathematical foundation for interpreting the radar images. In doing so, they offer a compelling validation for the idea that deep-seated voids and corridors, long speculated upon by alternative historians, can indeed be revealed non-invasively through remote sensing technology.

Survey Findings: Hidden Chambers and Structures Beneath the Giza Plateau

The radar survey data, as presented by the researchers, reveals a massive network of geometrically organized voids and solid structures underneath the pyramids. Multiple levels of previously unknown chambers, vertical shafts, and huge hollow volumes have been identified. Table 1 below summarizes the key subsurface features reported by Malanga, Biondi, and Mei:

Table 1: Major Subsurface Features Detected by the GPR Radar Survey*​

Reported Feature	Description	Approx. Depth / Size
Near-Base Chambers	Five identical chamber-like structures just below the base of the Khafre pyramid, each containing multiple horizontal levels with sloping stone roofs (resembling the design of the King’s Chamber in the Great Pyramid) . These five units appear to be interconnected by straight, geometric passageways or corridors.	Location: At or just below ground level around the pyramid’s foundation. Dimensions: Each chamber spans several tens of meters (comparable in size to the Great Pyramid’s King’s Chamber).
Vertical “Well” Shafts	Two enormous cube-shaped voids are situated at the lower terminus of the shaft system. Each cavity is roughly 80 meters per side, truly monumental in scale. The eight vertical shafts converge toward these two cubes, presumably connecting into them. The cubic chambers are positioned side by side.	Eight cylindrical vertical shafts are arranged in two parallel rows beneath the chambers. These structures appear hollow (like wells) and are each surrounded by a descending spiral pathway carved into the rock. The shafts are evenly spaced and symmetrical, suggesting an intentional architectural layout.
Massive Cubic Cavities	Eight cylindrical vertical shafts arranged in two parallel rows beneath the chambers. These structures appear hollow (like wells) and are each surrounded by a descending spiral pathway carved into the rock. The shafts are evenly spaced and symmetrical, suggesting an intentional architectural layout.	Depth: Extends ~648 m (over 2,100 ft) vertically into the earth. Count: 8 shafts (approx. 4 on each side of the complex).
Extensive Tunnels / Network	Horizontal Extent: Spans ~2 km (~1.2 miles) across, reaching under Khufu, Khafre, and Menkaure pyramids. Overall Layout: Multilevel (surface down to 600+ m) and multi-kilometer, forming a coherent complex.	Horizontal Extent: Spans ~2 km (~1.2 miles) across, reaching under Khufu, Khafre, and Menkaure pyramids . Overall Layout: Multilevel (surface down to 600+ m) and multi-kilometer, forming a coherent complex.

Figure: Conceptual cross-section (not to scale) illustrating the reported subterranean structures beneath Khafre’s pyramid. Five near-surface chambers (C1–C5) lie just under the base. Beneath them, eight vertical shafts (“wells”) descend ~648 m, terminating in two gigantic cubic chambers at the deepest level. (Diagram based on data from Malanga, Biondi, et al.) (*GPR = Ground Penetrating Radar; here referring to the SAR-based georadar method)

 

[NidarNidar]

According to the team’s report, these features align in a highly organized manner, implying an intentional design. For example, the five shallow chambers near the pyramid’s base are arranged symmetrically and are comparable in size/shape to known chambers inside the Great Pyramid. In fact, Dr. Mei noted that each of these five chambers “bears a striking resemblance to the King’s Chamber” – the central room in Khufu’s Great Pyramid – complete with a series of layered stone beams forming a peaked roof. This suggests whoever built them employed architectural principles similar to those used in the Great Pyramid’s construction. The chambers are connected by straight corridors, forming what appears to be a planned layout at the base of Khafre’s monument.


From those chambers, eight huge shafts plunge straight down in two rows of four. These shafts are particularly intriguing: they are hollow and cylindrical, on the order of several meters in diameter, with what looks to be helical (spiral) staircases or ramps winding around their interior walls. In the radar tomograms, this spiral structure was inferred from the pattern of reflections – essentially indicating a corkscrew-shaped void around each shaft. Such a feature is unlike anything known in conventional Egyptian archaeology, yet it evokes images of legendary subterranean “well shafts” or access tunnels described in some ancient texts. The depth of these shafts, roughly 600–650 meters, is astonishing – for comparison, that’s about eight times deeper than the height of the Great Pyramid itself. It is as if one could drop Khafre’s 136 m tall pyramid down the shaft and still not reach the bottom.


At the bottom of the shaft array, the radar data shows two immense rectangular cavities side by side, each about 80 m across. These cavernous cubic chambers are extraordinary in scale – large enough to fit a cathedral inside. The eight shafts seem to feed into these two big voids, possibly like vertical passageways converging into grand underground halls. The researchers interpret these giant chambers as central hubs of the underground network, perhaps serving as the nexus connecting to further tunnels or spaces. Notably, these chambers lie almost directly under the center of the pyramid complex. The fact that there are two such giant voids (rather than one) adds to the mystery – they could be twin halves of a larger structure or serve distinct purposes.


Finally, beyond the immediate area of the Khafre pyramid, the radar survey suggests a web of horizontal tunnels and additional chambers fanning out across the plateau. The team claims the entire subterranean system stretches roughly 2 kilometers end-to-end, reaching underneath the Great Pyramid (Khufu) on one side and the smaller Pyramid of Menkaure on the other. In essence, all three of the main Giza pyramids are underpinned by this interconnected underground complex. If this interpretation is accurate, it means the ancient builders excavated or constructed a truly massive multi-level infrastructure under Giza – something that has never been documented in mainstream Egyptology. Such an extensive network calls to mind the long-rumored “lost city” or labyrinth beneath the pyramids, a concept that until now was relegated to myth and speculation.




The images produced by the radar are tomographic reconstructions (somewhat akin to a CT scan of the ground). The researchers have published various plots and cross-sections showing these anomaly shapes, though, to the untrained eye, the radar tomograms are abstract. The descriptions above are the team’s interpretations of those radar images. They have labeled distinct features and matched some to known structures (for example, they correctly identified the known King’s Chamber and subterranean chamber in Khufu’s pyramid to validate the method ). The newly found structures, however, remain hypothetical until verified. Nonetheless, the mere suggestion of such hidden edifices beneath Giza has electrified both the public imagination and parts of the scientific community.
View attachment 357584
View attachment 357594
Hollowed tubes with stair like coil .





Interview with guy who published the press release on facebook:

Conference

 

[Midas]

I'm still somewhat skeptical although the implications of this is that anicent eygptian civilization is obviously much older or was built on the roots of an older civilization in the region. Either way this would go back to prenastic eygpt

Awowe east cushtic might have been a bigger deal than we thought

 

[chut]

I wonder if we could find any important archeology in somali areas using this. I've seen people saying there are pyramidal structures that are found throughout somaliweyn.

check this:
somali archeology on Joe rogan with Flint Dibble:
https://x.com/LtKhalifa/status/1780599383203217893

mexican pyramid before and after:
somali structures that look like they could be man made pyramids:

Naaso Hablood mountains?

however apparently a somali archeologist called sada mire debunked the idea of Naasa Hablood mountains being pyramids and stated that they were natural.

 

[NidarNidar]

I'm still somewhat skeptical although the implications of this is that anicent eygptian civilization is obviously much older or was built on the roots of an older civilization in the region. Either way this would go back to prenastic eygpt

Awowe east cushtic might have been a bigger deal than we thought

This is a legit paper that's being peer-reviewed, the tech is real, and the data is what is in question if they can prove it to be real, this will revolutionize archaeology, it be the equivalent of the telescope for astronomy on steroids.

Awowe E-M78 was something else, the pyramids timeline has never added up to me, aswell as the tool marks on the granite stones in the quarries make me question it even more.

 

[Midas]

This is a legit paper that's being peer-reviewed, the tech is real, and the data is what is in question if they can prove it to be real, this will revolutionize archaeology, it be the equivalent of the telescope for astronomy on steroids.

Awowe E-M78 was something else, the pyramids timeline has never added up to me, aswell as the tool marks on the granite stones in the quarries make me question it even more.

View attachment 357604

We wuz pyramid builders

 

[Midas]

I wonder if we could find any important archeology in somali areas using this. I've seen people saying there are pyramidal structures that are found throughout somaliweyn.

check this:
somali archeology on Joe rogan with Flint Dibble:
https://x.com/LtKhalifa/status/1780599383203217893

mexican pyramid before and after:
somali structures that look like they could be man made pyramids:

Naaso Hablood mountains?
View attachment 357603

however apparently a somali archeologist called sada mire debunked the idea of Naasa Hablood mountains being pyramids and stated that they were natural.

I honestly wouldn't be surprised if we find some momentumal architecture buried underground in somalia. I mean we've found weird stone calender tablets and stone sculptures. There was obviously some advanced urbanism going on in preislamic somalia. If the aksumites could build those huge stelaes. Then I'm sure we were probably doing something of decent scale as well.

 

[NidarNidar]

I wonder if we could find any important archeology in somali areas using this. I've seen people saying there are pyramidal structures that are found throughout somaliweyn.

check this:
somali archeology on Joe rogan with Flint Dibble:
https://x.com/LtKhalifa/status/1780599383203217893

mexican pyramid before and after:
somali structures that look like they could be man made pyramids:

Naaso Hablood mountains?
View attachment 357603

however apparently a somali archeologist called sada mire debunked the idea of Naasa Hablood mountains being pyramids and stated that they were natural.

I wouldn't be surprised, I won't dismiss anything, curiosity is the most cherished trait of humanity, there still a lot we have yet to discover.

 

[Aurelian]

Their claims or how they put it must be misleading. Many experts are skeptic about this, given that the technology they used is capable of achieving what the scientists claim. The SAR technology can't image at that depth, and deeper the target is the lower resolution you get. With time you will see their claims become more realistic or retract their research altogether.

 

[NidarNidar]

Their claims or how they put it must be misleading. Many experts are skeptic about this, given that the technology they used is capable of achieving what the scientists claim. The SAR technology can't image at that depth, and deeper the target is the lower resolution you get. With time you will see their claims become more realistic or retract their research altogether.

From what I've pieced together, the tech they are using is a modified version, it will need to be peer-reviewed, there is a reason why all the journalists that went their didn't post anything about it yet, one of the people involved is on more of the fringe side of things, I'm looking forward for the full release.

 

[TheLand]

Their claims or how they put it must be misleading. Many experts are skeptic about this, given that the technology they used is capable of achieving what the scientists claim. The SAR technology can't image at that depth, and deeper the target is the lower resolution you get. With time you will see their claims become more realistic or retract their research altogether.

From what I've pieced together, the tech they are using is a modified version, it will need to be peer-reviewed, there is a reason why all the journalists that went their didn't post anything about it yet, one of the people involved is on more of the fringe side of things, I'm looking forward for the full release.

I saw this somewhere else and didn’t buy. It seems like they are inferring this and not ‘seeing’ it directly, which seems like a stretch to me. I think they were just trying to generate attention which they’ve achieved.

 

[PotentialGaraad]

I wonder if we could find any important archeology in somali areas using this. I've seen people saying there are pyramidal structures that are found throughout somaliweyn.

check this:
somali archeology on Joe rogan with Flint Dibble:
https://x.com/LtKhalifa/status/1780599383203217893

mexican pyramid before and after:
somali structures that look like they could be man made pyramids:

Naaso Hablood mountains?
View attachment 357603

however apparently a somali archeologist called sada mire debunked the idea of Naasa Hablood mountains being pyramids and stated that they were natural.

The Black Pyramid also known as the pyramid of Amenemhat III looks like a big mound rather than a classic pyramid because it was made from mud brick and clay rather than stone and built at a low elevation which has exposed it to Nile water which has since eroded. The second picture is the capstone.

It is possible that there are pyramids and/or ancient structures in Somalia that have since eroded to appear as hills but this needs confirmation after excavation is done.