2021 SIGMA2 Report
1. Introduction 2. UAP Environment 3. Contacts and Communications 4. Selection of Cases 5. Observed Phenomena – Physical Effects 6. Observation 7. Conclusion and Way Ahead Access the full report here: 2021 Sigma2 Report

1. Introduction
- Scope and Mandate : SIGMA2 focuses on Unidentified Aerial Phenomena (UAP) by collating and analyzing data using rigorous scientific methodology. Its approach integrates documentation, case analysis, and the development of observation techniques.
- Historical Context : The report situates UAP research within a broader historical framework, acknowledging French, U.S., and global initiatives.
- Methodology : A structured approach to gather data, identify physical effects, and recommend improved observation techniques is emphasized.
2. UAP Environment
- International Landscape : The global context of UAP phenomena is explored, noting a lack of scientific engagement and an increasing need for collaborative efforts.
- Data Gaps : Despite advanced surveillance systems, systematic investigation into UAPs remains limited.
- Documentary Efforts : Emphasis on the importance of declassified and archived information, particularly from countries like the U.S. and Russia, to build a credible database.
3. Contacts and Communications
- Networking : SIGMA2 has built relationships with organizations like CNES-GEIPAN (France), CEFAA (Chile), and NARCAP (USA) to foster data sharing and technical collaboration.
- Public Engagement : The commission has increased awareness through publications and participation in debates, round tables, and international symposiums.
- Technological Advances : Efforts to improve detection networks, such as collaborating with IMCCE’s FRIPON network, are highlighted.
4. Selection of Cases
- Criteria : Cases were chosen based on reliability and the presence of physical data. These include incidents from France, the U.S., the UK, and Russia.
- Significant Cases : Examples include the Nimitz incident (USA, 2004) and the Aguadilla case (Puerto Rico, 2013), focusing on their unexplained kinematics and electromagnetic anomalies.
- Challenges : Limited availability of physical data and challenges in analysis were noted, emphasizing the need for better observational tools.
5. Observed Phenomena - Physical Effects
- Physical Manifestations : Analysis covers radar, electromagnetic interference, acoustic, and gravitational effects observed in UAP incidents.
- Natural Phenomena : Comparisons with natural occurrences like ball lightning and atmospheric plasmas to differentiate from artificial or unknown causes.
- Technological Theories : Speculative technologies, such as magneto-hydrodynamic propulsion and exotic materials, are considered as possible explanations for UAP behaviors.
6. Observation
- Limitations : Existing systems like civilian radars struggle with high-altitude and low-speed anomalies.
- Enhanced Techniques : Recommendations for integrating new technologies, such as passive radars and high-resolution imaging, to improve detection capabilities.
- Case Analysis : Highlighting the need for cross-referencing infrared and radar data for more accurate analysis.
7. Conclusion and Way Ahead
- Achievements : Progress in data collation, international networking, and case analysis.
- Gaps : Acknowledges limited access to indisputable physical evidence and the need for further technological advances.
- Future Directions : SIGMA2 aims to refine its methodology and foster greater global cooperation to systematically address UAP phenomena.
Access the full report here: 2021 Sigma2 Report

