Marek Grzegorzewski

STUDY OF EGNOS SAFETY OF LIFE SERVICE DURING THE PERIOD OF SOLAR MAXIMUM ACTIVITY

ABSTRACT The Satellite Base Augmentation System (SBAS) - EGNOS (European Geostationary Navigation Overlay Service) has been certified for Safety of Life (SoL) service for aircraft navigation since 2nd of March 2011. Unfortunately for the territory of Poland, located at the edge of EGNOS service area, the quality of the service corrections are still not sufficient for aircraft navigation requirements. Years 2012 and 2013 are forecasted as a maximum of solar activity in a 11-year solar cycle. This time period will be the chance to perform the first tests for the EGNOS Safety of Life service quality in disturbed ionospheric conditions. During the previous maximum of solar activity, the storm on 30 October 2003 resulted in the inability to use WAAS corrections for more than 12 hours. This was caused by a very large gradient of disturbances and its’ very sharp boundaries - vertical TEC (VTEC) varied from ~ 40 to ~ 120 TECU (TEC units) within an hour (over ~ 150 km distance). These circumstances gave the opportunity to carry out the test flights to examine the navigation parameters obtained for EGNOS SoL service in disturbed ionospheric conditions. The paper presents project proposal of study and analyses of such fundamental navigation parameters as: accuracy of determined position, availability, continuity and integrity, determined for selected disturbances in relation to quiet conditions. It can give a possibility to estimate of the quality of EGNOS SoL service in Polish airspace during the different phases of flight and its resistance to critical ionospheric conditions.

Air Navigation in Eastern Poland based on EGNOS

The Global Air Navigation Plan for CNS/ATM Systems (Doc 9750) recognizes the Global Navigation Satellite System (GNSS) as a key element of Communication, Navigation, Surveillance and Air Traffic Management (CNS/ATM) systems and a foundation upon which States can deliver improved aeronautical navigation services. Standards and Recommended Practices (SARPs) for the Global Navigation Satellite System (GNSS) were developed by the Global Navigation Satellite System Panel and introduced in ICAO Annex 10, Volume I in 2001 as a part of Amendment 76 to Annex 10. Guidance material in Attachment D to Volume I provides extensive guidance on technical aspects and application of GNSS SARPs that was provided, at the publication date, for satellite-based en-route through Category I precision approach operations 2 . GNSS service can be introduced in stages as the technology and operational procedures development. The staged implementation of GNSS service may be affected by various factors, including:  the existing navigation services;  level of air traffic services supporting GNSS operations;  aerodrome infrastructure;  extent of aircraft equipment. Depending upon these factors, States may adopt different implementation strategies and derive different benefits from the various stages of implementation. The introduction of augmentation systems enhances service and eliminates most limitations. Based on traffic volume and airspace structure, States can choose their level of involvement in the development and implementation of ABAS, SBAS and/or GBAS. These implementation efforts require a high level of cooperation among States to deliver maximum operational advantages to aircraft operators.

The GNSS System Application in the LPV-200 Landing Approach Procedure. Part I : Approach to Practical Verification

Abstract Current RNAV GNSS approach procedures are widely used in Europe and worldwide. The development of the GNSS systems as well as the study and control of satellite signals result in the increasing number of approach types with increasingly higher demands and lower operating minimums. LPV-200 is the precision approach with the most stringent requirements, and operational minimums of up to 200ft. For the purposes of Part I of this paper static measurements were performed in order to compare the signal characteristics with ICAO requirements. On the basis of the measurements′ results, it can be assumed that, within the analyzed period of time, the GNSS signal at the airport in Dęblin only partially met the requirements set for LPV-200 approaches. The data collected were processed and analyzed using Matlab environment.

Examination of EGNOS Safety-of-Live service in Eastern Slovakia

Abstract The first PBN approach procedures in Slovakia became operationally effective at Bratislava and Košice airports as of 5 February 2015. The article presents the results of EGNOS Safety-of-Life Service preliminary examination in eastern Slovakia, just before official introduction of these procedures. The practical examination includes static test and test flight made with Cessna plane taking off at the airport in Bidovce — LZBD (just 16 km from international airport in Košice) and passing a route along eastern border of Slovakia. In this region the performance of EGNOS could be unsatisfactory due to lack of RIMS stations to the east from there. The experiment was performed on October 13, 2014 in cooperation of the Air Force Academy in Deblin, the Department of Aviation of Technical University in Košice and University of Warmia and Mazury in Olsztyn.

The use of magnetic field and magnetometers in supporting the air navigation

Abstract At present, the Earth’s magnetic field (geomagnetic field) undergoes considerable variations. The use of towers measuring areal variations in magnetic intensity may provide additional support for aircraft navigation. This paper presents the idea of using magnetometers for supporting GNSS as well as for creating a landing system based on magnetic field variations.