THREE-DIMENSIONAL MODELING

Course objectives

GENERAL The course introduces the fundamentals of the airspace organization, of the air traffic services, as well as of the communication, navigation and surveillance systems used in aeronautics. Air traffic routes, aeronautical charts and departure and arrival procedures are described. The concepts of analog and digital modulation/demodulation are recalled, together with the operating principles and the main characteristics of the antennas. Basic elements on probabilities and on the characterization of random events/processes are provided. The operating principles of air navigation systems are described: ground-based radio aids and satellite navigation systems. The performance parameters of the navigation systems are described and critically assessed, in terms of accuracy, availability, integrity and continuity and the necessary requirements for managing the risk associated with the trajectories in the different phases of the flight. Aeronautical communications systems are introduced for voice and data transmission, both point-to-point, and within digital networks for aeronautical telecommunications. Surveillance systems for Air Traffic Control are introduced, with particular reference to primary and secondary radar systems, multi-lateration systems and ADSB. Tracking and prediction techniques for managing collision risk in the air and on the surface are described. SPECIFIC Knowledge and understanding: At the end, the student has acquired a basic knowledge of issues and instruments/systems for air traffic management and the ability to critically evaluate the fundamental parameters of the instruments/systems. Applying knowledge and understanding: at the end of the course the student is able to use the acquired knowledge to estimate/analyze the performance provided by instruments/systems for air traffic management in terms of coverage, bands and measurement accuracy. Making judgements: at the end of the course the student has developed the independence of judgment needed to integrate the knowledge and handle the complexity of the information technologies, used in the air-traffic scenarios; evaluate their reliability and assess their impact on the air traffic safety, also with reference to the related social and ethical responsibilities. Communication skills: at the end of the course the student is able to communicate effectively with engineers, specialized technicians and on-specialized personnel, acting in the area of the information technology for the management and control of air transport. Learning skills: at the end of the course the student is able to learn autonomously the future information technologies, potentially used in the developments of methodologies and procedure to increase air traffic safety and capacity.

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PIERFRANCESCO LOMBARDO Lecturers' profile

Program - Frequency - Exams

Course program
The main principles are introduced for the air traffic management and the instruments of Communication, Navigation and Surveillance (CNS) used in this context. Program: (a) Comunicazioni e radioaiuti terrestri alla navigazione i) the Air Traffic Control (ATC): control areas and requirements, landing categories. (ii) Communication systems: analog and digital radios; modulations; coding and performance, with the elements of probability required for their description; (iii) signals, modulations and antennas for CNS (iv) Ground based Radio Navigaton Aids: principle of operation of NDB, VOR-DME, TACAN (b) Global Satellite Navigation Systems (GNSS) (in English): (i) GPS, GLONASS, GALILEO: space segment, control segment, and user segment. (ii) Transmitted waveforms and positioning codes. GNSS receivers. Signal processing techniques: code and phase positioning, ionospheric and tropospheric error correction. (iii) Quality parameters for positioning performance evaluation: Error Covariance matrix and – Accuracy, availability, continuity, and integrity. Elements of reliability, redundancy, and performance guarantee, continuity, and integrity. (iv) Differential GPS (DGPS): RTCM and RTK. Contributions to the errors in the observables and positioning measurement accuracy. “Augmentation” systems (WAAS and EGNOS) and interoperability among navigation systems (i.e. GPS and GLONASS). (v) Positioning and Tracking of space vehicles and objects using Radar and Multilateration techniques. (c) Surveillance Systems: (i) elements of probability for the CNS systems (ii) primary radar (iii) secundary radar and Mode-S radar (iv) multilateration systems (v) ADS-B system
Prerequisites
There are no specific courses that are required to be passed before this course. The prerequisite for this course is the basic knowledge of Telecommunication Systems for Aerospace or basic elements of signal theory.
Books
• Notes on Controllo del Traffico Aereo, T. Bucciarelli • Kaplan, “Understanding GPS”, Artech House 1996, • Lecture slides available at the web site https://elearning2.uniroma1.it/course/view.php?id=6298
Teaching mode
The course can be attended both in the traditional in-classroom way (following the indications by Sapienza) and from the remote, in a synchronous way by means of real-time online connection. Moreover, the video-recorded lectures are progressively made available for the lectures. Therefore, also an asynchronous attendance is possible.
Frequency
Despite highly recommended, attendance at the course lectures is not compulsory.
Exam mode
ASSESSMENT TOOLS: The verification of learning takes place through two tests: (i) a written test (lasting 3 hours - 30% of the final grade), in which the student is asked to solve exercises on the performance of communication, navigation surveillance systems or to size their main design parameters. (ii) an oral test (a part of which might be held in written form, but is followed by its oral discussion - 70% of the final grade) that provides the answer to open questions about the basic principles of the sub-systems or the related signal processing techniques. The written test is positive if at least two out of the three exercises are marked as good. Test (i) can be replaced with partial tests carried out during the lessons on the Sapienza e-learning platform. ASSESSMENT METHODS: Assessment of knowledge on the principles management/organization of the air traffic; assessment of knowledge on the elements of probability that are used for the performance evaluation of the CNS instruments; assessment of knowledge on the principles of terrestrial and satellite radio location systems; assessment of knowledge on the performance evaluation of terrestrial and satellite radio-positioning systems; assessment of knowledge and skills in the preliminary design of surveillance sensors; assessment of knowledge and skills on the principles of operation of communication systems. EVALUATION CRITERIA: For each topic (thirty points-based ratings): sufficient knowledge (rating from 18 to 20); average knowledge (rating from 21 to 23); sufficient skills to apply the knowledge (rating from 24 to 25); good skills to apply the knowledge (rating from 27 to 28); excellent skills to apply the knowledge (rating from 29 to 30 with honors).
Bibliography
• ICAO - Annex 10 • Global Positioning System: Theory & Applications, Volume I, by Bradford W. Parkinson (Editor), James J. Spilker (Editor), ISBN-13: 978-1563471063, ISBN-10: 156347106X • Global Positioning System: Theory and Applications, Volume II, by B. Parkinson (Author), J. Spilker Jr. (Author), P. Axelrad (Author), P. Enge (Author), ISBN-13: 978-1563471070, ISBN-10: 1563471078
Lesson mode
The course can be attended both in the traditional in-classroom way (following the indications by Sapienza) and from the remote, in a synchronous way by means of real-time online connection. Moreover, the video-recorded lectures are progressively made available for the lectures. Therefore, also an asynchronous attendance is possible.
  • Academic year2025/2026
  • CourseAeronautical engineering
  • CurriculumModellistica e analisi per la progettazione aeronautica [Percorso valido anche per coloro che partecipano ai percorsi internazionali di doppio titolo italo-statunitense (con Georgia Institute of Technology o con Georgia Tech Europe) o italo-portoghese]
  • Year1st year
  • Semester1st semester
  • SSDING-INF/03
  • CFU6