EMACS. Electromagnetic Airport Control & Survey A professional solution for inspecting electromagnetic performances of radio navigation aids

Transcription

1 EMACS Electromagnetic Airport Control & Survey A professional solution for inspecting electromagnetic performances of radio navigation aids EMACS for site analysis & modelling EMACS for ray tracing analysis EMACS for ILS in time domain EMACS: Electromagnetic Airport Control and Survey is a modular analysis tool devoted to inspect and modeling radio electrical feature and the installed and proposed Navaids, and is based on a set of numerical codes totally developed in IDS s laboratories in order to solve the Maxwell equations in complex environments such as the airport scenarios. The numerical tools of EMACS cover the whole aeronautical frequency band, and are based on the most sophisticated and widely known computational electromagnetic techniques, such as: Geometrical Theory of Diffraction (GTD/UTD) Physical Optics (PO/PTD/ITD) Method Of Moments (MOM) Deygout Method Parabolic Equations (PE) EMACS commitment is to enable the user to calculate and simulate the same parameters that are typically inspected during the commissioning or periodical flight checks. The modeling functionality (including terrain models, obstacles, interfering system, ground and airborne Navaids equipment characteristics etc.) allows an expert user to model the real propagation phenomena in a complex electromagnetic airport scenario where signals (VOR, DME, ILS, ATC Radar, GPS systems) interfere with artificial or natural obstructions. The system is based on a layer of graphical and geographical functions: Graphical utilities (CAD) for the construction and visualization of 3D elements Geographical utilities (GIS) for locating elements on a geographic continuum using almost all known types of datum and projections including obviously WGS84. Last update: Feb 2007

2 EMACS is composed of 8 different modules. Terrain Scenario Terrain Analyst m Terrain profile Fresnell profile NM Terrain profile analysis along a radial Basic Coverage, which provides numerical tools for the following tasks: Digital Terrain Model inspection by means of probe function and terrain profiles extraction along polylines and/or circles Fresnell ellipse analysis CAD modeling of the environment around the TX antenna Radio coverage evaluation: at constant altitude or height along a route segment Antenna pattern definition and modeling Basic Coverage is a pre-requisite for the rest of the system because it provides the following basic services: The geographical and electromagnetic Project Management for the handling of the various projects, workspaces and user s designs Database connection management and alphanumeric interface to the stored data User Administration and grant policy Configuration of the project data on the network and among the different users Network and program configuration for the electromagnetic analyses Task scheduler for the electromagnetic numerical analysis execution. Example of radio coverage analysis of three VOR Radio coverage of a VOR as a function of the different transmitting powers Switch point positioning along an airway segment

3 DME, which provides numerical analysis tools for the following tasks: Omni and sectorial antenna modeling starting from the manufacturer s data sheets CAD modeling of the environment around the DME antenna, taking into account the dielectric properties of the materials constituting each element Performance simulation of DME/N and DME/P equipment in the real site, taking into account multi-path from elements such as terrain, buildings and the other site elements (such as fences, wires and towers).dme signal analysis by means of the computation of quality parameters such as signal field strength DME pulse envelope, power delay profile and distance measuring error. With ASUV-DME/DME is possible to compute for each analysis point (which will lay along the route/ procedure under analysis) the list on DME couples which meet the RNAV DME/DME requirements from PANS-OPS, and which are the critical DME ground stations; ILS, which provides numerical tools for the following tasks: Localizer and glide path antenna modeling starting from the manufacturer s data sheets. The system has the capability to insert all types of available ILS systems (i.e. mono and dual frequency, dipole/reflector or other radiator array, such Yagi and others, can be arbitrarily and easily considered) CAD modeling of the environment around the Localizer and Glide path antenna, taking into account the dielectric properties of the materials constituting each element Performance simulation of ILS equipment (GP and LLZ) in the real site, taking into account multi-paths from elements such as terrain, buildings and other site elements (such as fences, wires and towers) ILS signal analysis by means of the computation of quality parameters such as signal field strength and Difference in Depth of Modulation (DDM). Amplitude FLY LEFT -0.1 Angle Receiver simulation for DME DME/N coverage analysis output DDM (µa) IDS Ingegneria dei Sistemi S.p.A.; ILS_RX v Distance (NM) Localizer 2F; Env. EM Model: SRF Analysis: JB005646_LLZ.EMD; Frequency: MHz System EM Model: LLZ_F4000_LIPZ; Aircraft Speed: knts Filter Cut Off Frequency: rad/sec; Scan : ILS 3 IDS Ingegneria dei Sistemi S.p.A.; ILS_RX v FLY RIGHT DDM--> DDM--> DDM--> DDM-->-1.0 Relative DDM Distance (NM) Localizer 2F; Env. EM Model: SRF Analysis: JB005806_LLZ.EMD; Frequency: MHz System EM Model: LLZ_FACE4000_MOD01_LIPZ; Aircraft Speed: knts Filter Cut Off Frequency: 0.50 rad/sec; Scan : ILS DDM Nominal Limits LLZ Displacement sensitivity along an orbit at constant height Misura LLZ - TX1 Raw DDM hang A-C Cat. 3 Limits Computed vs. measured DDM CAT III along a RWY segment Filtered DDM Cat. 3 Limits Misura LLZ-TX1 Computed vs. measured DDM CAT III along a final segment

4 Relativ e E rr or IDS Ingegneria dei Sistemi S.p.A. VOR_RX v Azimuth (deg) Doppler VOR Env. EM Model: SRF Analysis: JB003011_VOR.EMD Frequency: MHz System EM Model: DVOR_WINDLUX Aircraft Speed: knts Filter Cut Off Frequency: 2.00 rad/sec Raw Err or ICAO Limits VOR error bearing computation (along an arc of route) output VOR, which provides numerical analysis tools for the following tasks: Conventional or Doppler antenna modeling starting from constructor data sheets CAD modeling of the environment around the VOR antenna, taking into account the dielectric properties of the materials constituting each element Performance simulation of VOR equipment on the real site, taking into account multi-paths from elements such as terrain, buildings and the other site elements (such as fences, wires and towers) VOR signal analysis by means of the computation of quality parameters such as signal field strength and Bearing Error. VOR error bearing computation (in a azimuth-distance map) output Ground-Air Antenna installation site Example of site modelling Air/Ground TLC, which provides numerical tools for the following tasks: Dipole, Log periodic and Yagi antenna modeling starting f r o m t h e manufacturer s data sheets CAD modeling the environment along the TX/Rx antenna path, taking into account the dielectric properties of the materials constituting each element Radio coverage in the real site, taking into account multi-path from elements such as terrain, buildings and the other site elements (such as fences, wires and towers) Near field signal distribution Multi-path analysis and power delay profile Radiation Hazard analysis Scan Area Coverage boundary Example of ground-air TLC radio coverage on the ground Example of radiation hazard area computation Example of ground-air TLC radio coverage at 4500 ft of altitude

5 Radar, which provides numerical analysis tools for the following tasks: Sum and mono-pulse antenna modeling starting from the manufacturer s data sheets CAD modeling of the environment along the Radar antenna path, taking into account the dielectric properties of the materials constituting each element Radio coverage in real site, taking into account multi-path from elements such as terrain, buildings and the other site elements (such as fences, wires and towers) Near field signal distribution Multi-path analysis and power delay profile Radiation Hazard analysis False replies analysis for SSR equipment Off-bore sight Angle estimation error analysis for mono-pulse SSR antennas El El without obstacle with obstacle Az Az Norm Gain (db) RADAR antenna pattern degradation for fixed pointing direction EMI (Electromagnetic Interference), which provides numerical analysis tools for the following tasks: Rx and TX equipment modeling starting from manufacturer s data sheets CAD modeling of the environment Interference ratio analysis Max. gain degradation along an azimuth sector around the radar antenna MLAT sample HDOP and sensor visibility EMI Module main interface Example of EMI analysis for fixed position equipments Example of EMI analysis for moving equipments

6 MLAT (Multilateration analysis), Multilateration systems are aimed to detect the position of an aircraft on the airport surface by means of the measure of the different time of arrivals of SSR replies between couples of sensors installed within the airport area. The MLAT module is capable to compute the following set of parameters: area of radio coverage of each sensor; number of sensors in view from each point; dilution-of-precision and its horizontal and vertical components; estimate of the aircraft position by means of a multilateration algorithm taking into account: Visibility of Sensors in NE and SE masking and multipath effects thermal noise and interfering signals Tx and Rx antenna patterns Rx synchronization noise. Position of sensors in the airport Visibility of Sensors in NW IDS Engineering Services : Support CAA/ANSP with electromagnetic modeling of airport scenario and navaid systems, for overall aerodrome operations assessment (procedures and system performance),with radar and navaid system siting within airport and navigation site areas, including assessment of natural and artificial obstructions. With feasibility analysis of new airports (runway location and navaids system)with analysis on impact of airport category upgrade on navaid system siting and performance. By evaluating new obstructions (under planning permission) impact on navaid system performance (Annex 14 and Annex 10),with differential GPS ground siting from the point of view of multipath mitigation and in band and out band interference, and PSR/SSR coverage and radar maps.

7 ILS/ MLS VOR/ DME/ TACAN IDS Experience in Electromagnetic analysis ILS N. 3 Italian Military Aerodromes (2004): Siting EMC design (radio coverage analysis, multipath analysis and EMC/EMI analysis) of a new ILS landing system on 3 air bases open to the civil traffic Radio Navigation Aids and a new building Torino/Caselle International Airport (2003) Analysis of the compatibility between a new industrial building and the existing radio navigation aids in the Torino/ Caselle airfield. ILS Two Italian Air-bases open to the civil traffic (2003): Siting EMC design (radio coverage analysis, multipath analysis and EMC/EMI analysis) of a new ILS-DME/P landing system on two air bases open to the civil traffic ILS N. 3 Italian Military Aerodromes ( ): Siting EMC design (radio coverage analysis, multipath analysis and EMC/EMI analysis) of a new ILS landing system on 3 air bases open to the civil traffic MLS/DME Four Italian airports (2000): Siting EMC design (radio coverage analysis, multipath analysis and EMC/EMI analysis) of 4 new MLS-DME/P landing system. ILS/LLZ - Forlì Airport (1997) : Assessment of R-NAV-Aid performance modification due to the future edification of a new building inside the airport area ILS -Lisbon Aerodrome (1997) : Analysis of the interference risk (EMI) on the aircraft on-board ILS receivers along the final landing procedure caused by fixed and/or mobiles TX stations (city band, mobile phone, etc.), and indication of countermeasures to keep this risk at the minimum MLS/DME Italian Air Base (1996): Siting EMC design (radio coverage analysis, multipath analysis and EMC/ EMI analysis) of a new MLS-DME/P landing system MLS/DME - Pratica di Mare Airport (1995): EMC analysis (radio coverage analysis, multipath analysis and EMC/EMI analysis) of an existing MLS-DME/P landing system, and comparison with flight measurements ILS - Pantelleria Airport (1993) : ILS equipments (LLZ and GP) siting feasibility analysis within the airport area ILS/GP - Napoli Capodichino Airport (1992): EMC analysis of the existing ILS/GP system and comparison with flight measurements LOC/DME/VOR - Bolzano Airport (1990) : LOC/DME and VOR installation feasibility study. ILS/GP - Palermo Punta Raisi Airport (1987) : EMC analysis between the existing ILS/GP system and a new railway tunnel VOR/DME Diekirch remote site (2003): IDS Ingegneria Dei Sistemi has been awarded with a contract from Eurocontrol (Procurement and Special Agreements office) to assess the potential impact of the already erected and the planned wind-turbines on the Diekirch DVOR/DME radio paths. The final report shall also state whether DVOR/DME performance is expected to exceed ICAO Annex 10 tolerances in identified airspace volumes and whether a de-location of the DVOR/DME is necessary DVOR/DME Aosta Airport ( ): Instrument approach procedure design using VOR/DME equipment. The project executed included the navigation aid installation EMC design DVOR/DME N. 5 Italian sites ( ): EMC design of 5 new DVOR/DME equipments installation including analysis of the same and interferences (EMI) risk evaluation between the new equipments and the existing R/TX ones TACAN Alghero/Fertilia Airport (1996): Siting EMC design (radio coverage analysis, multipath analysis and EMC/EMI analysis) of a new TACAN system VOR- Weather Radar - Campagnano Romano site (1994): EMC analysis between the existing of the VOR/ DME equipment and a new weather radar to be installed nearby the navaids antenna DVOR-Meteo Radar - Saronno and Campagnano Romano remote sites (1993): EMC analysis between the existing of the DVOR/DME equipment and new weather radar to be installed nearby the navaids antenna VOR - Ronchi dei Legionari Airport (1988): EMC analysis between the existing VOR equipment and a new industrial building MLATR configuration & design at Milan Malpensa and Rome Fiumicino International Airport (2004) Radar / SMGCS APP Radar (2004) : analysis of radio coverage in the approach area for 20 Italian airports ATC Radar and wind farm in Sardinia (2003): Analysis of the compatibility of a wind farm with an existing air traffic control radar ASMGCS Fiumicino Airport ( ): Radar sensors antenna siting design, pattern distortion, coverage, visibility area evaluations, and radiation hazard evaluation ASMGCS Bologna Airport (1999): Preliminary analysis of the coverage of a surface movement radar part of the airport SMGCS system, and of its associated UHF links. This project covered also the risk analysis of the interferences (EMI) between the new equipments and the existing R/TX ones (Ground-Air, Radar APP, ILS). ASMGCS Milano Airport (MALPENSA 2000) ( ): Preliminary analysis of the coverage of a surface movement radar part of the airport SMGCS system, and of its associated UHF links. This project covered also the risk analysis of the interferences (EMI) between the new equipments and the existing R/TX ones (Ground-Air, Radar APP, ILS). ATCR/SSR - Palermo Airport (1998): EMC installation design of the new approach radar (i.e. radio coverage, antenna pattern multipath degradation, false echoes analysis and EMI risk assessment between the new equipments and the existing R/TX ones). ATCR/SSR - TLC (V/UHF) - Direction Finding - Milano Airport/MALPENSA 2000 (1997): EMC installation design of the new approach radar (i.e. radio coverage, antenna pattern multipath degradation, false echoes analysis and EMI risk assessment between the new equipments and the existing R/TX ones). ATCR/SSR - Torino/Caselle Airport (1996): EMC installation design of the new approach radar (i.e. radio coverage, antenna pattern multipath degradation, false echoes analysis and EMI risk assessment between the new equipments and the existing R/TX ones) ATCR/SSR - Genova/Sestri Airport (1996): EMC installation design of the new approach radar (i.e. radio coverage, antenna pattern multipath degradation, false echoes analysis and EMI risk assessment between the new equipments and the existing R/TX ones)

8 Brief history Company profile IDS - Ingegneria Dei Sistemi S.p.A. is an independent system engineering company, established in Pisa in 1980 with the aim to provide high technology services in defense and civil areas with solutions aimed to specific agencies needs (Aeronautical, Space, Naval, Telecom, etc.). Customers IDS offers its services and products to Government Agencies, Industrial Companies and Research Establishments requiring a specific technical support in facing development of special projects and implementation of complex programs. Qualification IDS Quality System is certified ISO 9001: 2000 for system design, "computer aided" modelling and performance simulation in the field of electromagnetism, radar, signals and data processing and mechanical structures. Developments, supply and maintenance of related software products. Cert AQ-FLR-SINCERT. IDS has the highest Military Clearance and is registered in the list of the Research Laboratory appointed by the Ministry of University and Scientific Research. Aeronavigation division IDS Aeronavigation Division was established in 1993 and nowadays provides worldwide the most comprehensive and integrated selection of aeronautical software solutions available in the Air Transport Industry. IDS Aeronavigation Division counts on the largest customer base in the AIS industry for static data processing and has been working with leading AIS organizations to develop flexible solutions that accommodate ICAO, EUROCONTROL and custom requirements. The modular system architecture provides appropriate solutions for Civil Aviation Agencies, Air Navigation Service Provider airlines, cartography producers or other organizations. The solution grants an integrated environment from Data Collection to Data Exploitation. IDS Aeronavigation Division provides a range of services (consulting, training, implementation services, etc.) to help the customer to get a successful start and protect his investments. Contact us: IDS Headquarters Via Livornese, S. Piero a Grado, Pisa - Italy Tel Fax idspisa@ids-spa.it Internet: IDS Office Via Flaminia, Rome - Italy Tel Fax aerodivision@ids-spa.it Internet: