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Welcome to the GfL - „the safety maker in Aviation“

The consulting company Gesellschaft fuer Luftverkehrsforschung mbH (GfL) has been involved advisorily in the areas of flight operations, airport planning and ATM procedure planning since 1995. The management holds the title of expert for air traffic in Germany and as well as Austria. GfL offers a range of services primarily including advising and appraisal concerning safety assessments for airlines, ATC and airports, airport planning services, analysis of air space concerning DEP/ARR operations in the vicinity of airports and support within the scope of the approval of non-compliant infrastructure concerning EASA/ICAO. The profound consulting services regarding special matters of air traffic (law, environment, system engineering) in cooperation with our long-term partners complete our service portfolio.

GfL also offers ATM and airport software solutions: This includes operational safety management systems (SMS) for airports and airlines, special risk assessment tools for TMA areas as well as terminal and airside/landside fast time simulations for airport operations. We are proud to have successfully implemented and established our systems in our partners’ operations without any complaints for many years.

Are you interested in GfL’s areas of activity and looking for a challenging job? Please get in touch with us!



April 2018: ETAS presented at the International ATM Conference China, Beijing

In the week of 20.03 the “2018 International Symposium on Air Traffic Management for Civil Aviation" was held in China, Beijing. CEO Hartmut Fricke was invited to give a Key Note on „Airport Challenges to Cope with Single European Sky Performance Targets“ as researcher from TU Dresden. In this note, we also presented our software ETAS which found particular interest from Air China. Air China is member of the Star Alliance Group and as such is highly motivated to compare every day’s flight efficiency of its fleet with the respective performance reached in Europe by e.g., Lufthansa. More than 250 guests from politics, Industry and research attended the event.

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March 2018: New article about our in-house fuel and emission calculation software ETAS published in “Ingenieurspiegel”

GfL’s in-house developed software ETAS (EJPM Based Trajectory Analysis Tool) allows the precise calculation of fuel consumption for jet and turboprop aircraft as well as pollutant emissions (e.g. COX, NOX, soot etc.) based on available aircraft trajectories, such as radar data. The software’s innovative character and its successful operational launch at German ANSP Deutsche Flugsicherung GmbH encouraged us to present the software’s functioning, application and planned development to a professional readership within this year’s aviation edition of the journal “Ingenieurspiegel”. The article being released under the heading “Introduction of a calculation software at Deutsche Flugsicherung for monitoring of aviation’s fuel consumption and emissions to assess flight procedures” is available in German > here).
For further information concerning the software, do not hesitate to contact us!

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March 2018: Airport Braunschweig-Wolfsburg decides to order GfL’s software Digital Aerodrome Manual (DAM)

With the entry into force of Certification Specifications (CS) and Guidance Material (GM) for Aerodromes Design (CS-ADR-DSN) by the European Aviation Safety Agency (EASA) on 6 March 2014 a harmonized pan-European guideline based on ICAO Annex 14 was implemented. Complemented by Regulation (EU) No 139/2014 new directives became effective stipulating common standards for the planning, operation and maintenance of safe airports. An integral part of the certification process is the aerodrome manual. GfL’s software solution DAM provides an appropriate outline and filtering function as well as document management including version controlling. DAM can be integrated into our Safety Management System (SMS) software module easily. By now our SMS software solutions are applied at several German airports.

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February 2018: GfL delivers safety assessment concerning the reduced approach lighting system at airport Münster/Osnabrück

In landing direction RWY 27 (ILS CAT I) at airport Münster/Osnabrück (FMO) there is currently a simple approach lighting system (SALS) with an overall length of 420 m being non-compliant regarding the specifications for precision approach runways with an overall length of 900 m after EASA CS-ADR-DSN (see news September 2017). In order to guarantee safe flight operations despite of these deviations GfL conducted a detailed safety assessment according to EUROCONTROL’s recommendations. The related risk analysis was mainly based on extensive flight simulation test with certified airline pilots and supported by geometrical analyses of cockpit visibilities and obstacle clearance altitudes. Within specific scenarios, a huge amount of simulation data was generated and subsequently statistically analyzed to receive statements concerning flight path deviations, scattering of touchdown points and flight attitude parameters. Finally, it was found that the reduced ALS completely fulfils its primary function. For the purpose of safe flight operations and the ALARP principle specific risk mitigation measures were nevertheless derived.

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February 2018: GfL delivers aeronautical study concerning flight operations at special-purpose airfield Iserlohn-Sümmern due to the installation of wind turbines in its vicinity

The company Energie- und Messtechnik/Windenergie GELSENWASSER AG plans to install three wind turbine generator systems (WTGS) west of special-purpose airfield (SPA) Iserlohn-Sümmern. It was noted that the obstacle limitation surfaces according to the national directive NfL I 92/13 are penetrated and the WTGS additionally affect the airspace used for approach and departure by small powered aircraft as well as glider tugs. In order to proof safe flight operations GfL conducted an aeronautical study (AS). Therefore, specific safety areas surrounding the WTGS were determined taking into account obstacle requirements and turbulences caused by the WTGS’ rotors. The resulting risks were analyzed by applying a four-step evaluation scheme in order to clarify the feasibility of critical flight trajectories leading to potential collisions. These steps contain the analyses of minimum requirements according to EASA CS-23 for powered aircraft and national directive NfL II 17/03 for sailplane towing with microlights, flight performance data pursuant to certified aircraft flight manual of the reference airplane operating at the SPA and finally GPS flight tracks provided by the SPA’s users. Because of detected violations within these steps, several risk mitigation measures were derived (especially implementation of a circuit / traffic pattern) within the risk assessment in order to guarantee safe flight operations at SPA Iserlohn-Sümmern.

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January 2018: German Airports become EASA certified

By decree of Regulation No 139/2014 based on Regulation No 216/2008 common standards for planning, operation and preservation of safe aerodromes are stipulated. By 31st December 2017, all member states and in particular Germany had to implement these standards, especially concerning the guidelines issued by the European Aviation Safety Agency (EASA). By now, the German Airports Association (ADV) announced that all German airports received their EASA certificate in due time (see > here).
We are very pleased to see our customers having been certified. GfL supported this partially quite complex certification procedures for various airports by e.g., conducting (equivalent level of) safety (ELOS) assessments to prove compliance for given infrastructural local specifics or the development of individual software solutions (e.g., our HTML SMS Tool, see > here and Airport Conformance Monitor (see > here). These supportive activities were partly carried out with GfL’s specialists on site over several years. As airports now have to monitor their compliance regularly, we stand to our customers and keep on assisting. Find out more about our relevant services! You may download our EASA flyer from the flyers area!

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January 2018: Rostock Airport decides to order GfL’s Safety Management System

After intense analyses, our HTML Safety Management System (SMS) tool was able to convince Rostock Airport. The tool allows acquisition, management and auditing of safety-relevant events and processes according to EASA directives. At Rostock Airport the newest version 4.0 will be applied, especially allowing the support of mobile devices. Consequently, our SMS tool’s newest version will be operated at four international airports (Hannover, Dresden and Leipzig/Halle). Its delivery to Rostock Airport is scheduled for April 2018. Find out more about its functionalities > hier resp. contact us in order to get your individual system solution.

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December 2017: GfL/TUD rolling out Vertical Profile Assessment Tool (V-PAT) to EUROCONTROL

Since 2015, TU Dresden, Chair for Air Transport and Logistics jointly developed with GfL the new V-PAT version under SESAR, now running as a JAVA application. As such, V-PAT is able to run on any operating system (Windows, Linux, MacOS X). Various metrics (e.g., time, altitude and fuel burn sampling of horizontal flight segments during CDO) were developed and implemented to assess flight trajectories in fast time using CCO and CDO as proxies for vertical flight efficiency (VFE). V-PAT is now capable of handling several thousands of flight trajectories in a single run and is able to assess the undertaking of VFE based upon the outcomes of the European CCO and CDO Taskforce1. VPAT has now been formally deployed to the Directorate Pan-European Single Sky, EUROCONTROL in Brussels. "I confirm that we are satisfied with the final deliverable and we thank you for the hard work put into the project by your team." says D. Brain, DPS/POL, EUROCONTROL (see for more details on related EUROCONTROL activities > http://www.eurocontrol.int/articles/continuous-climb-and-descent-operations).

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November 2017: Cologne Bonn Airport (CGN) decides to extend safety assessment concerning strength of runway strips to runway end safety areas (RESA)

EASA’s directive CS-ADR-DSN provides specific requirements concerning the bearing strength of runway strips (California Bearing Ratio (CBR) value of 15 – 20) in order to minimize the hazard of an aircraft accidently running off the runway during veer off incidents/accidents. The analysis conducted within the safety assessment shall now be extended to all RESAs of the runway system. According to EASA GM1 ADR-DSN.C.235 the same bearing strength requirements mentioned above are valid for RESAs as well. The safety objective of RESAs is to minimize risks to aircraft (especially substantial damage to their nose landing gears) and their occupants when an aircraft overruns or undershoots a runway and additionally support appropriate bearing strength to decelerate the aircraft (reducing of accident location). Within the scope of the airport’s EASA certification the risk assessment methodology developed by GfL is applied. Besides that, further investigations will be carried out covering the risk of aircraft collisions with subsurface constructions. Overall objective is to provide evidence that safe aircraft operations can be guaranteed at Cologne Bonn Airport (CGN) even if there are potential guideline deviations.

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November 2017: GfL delivers capacity assessment concerning the runway system of Oslo Gardermoen Airport (OSL) to AVINOR

In 2006, GfL first assessed the capacity of the parallel runway system at Oslo Gardermoen Airport (OSL). At that time, the planning vision of a third runway for Norway’s largest airport was focused. This masterplan is still valid, for example resulting in a terminal extension in 2017. For the next decade, provision is made for setting up a departure manager system (D-MAN), realizing rapid exit taxiways on both runways and – longer-term – building a third runway. All these options were considered within specific traffic scenarios as part of the assessment being recently submitted. Furthermore, the effects on runway capacity at OSL by applying separation minima pursuant to RECAT-EU were determined. The capacity calculation’s method is generally based on Statistical Queuing Modelling and fast-time simulations. AVINOR is the operator of all Norwegian aerodromes controlled by ATC as well as air navigation service provider (ANSP).

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October 2017: Fraport and GfL further extend cooperation to support EASA certification at Frankfurt airport

GfL has been supporting Fraport AG in regards to EASA certification of aerodrome infrastructure and operational and organizational structures since 2014. Due to the tremendous complexity of Germany’s largest airport this project is characterized by perennial teamwork and also includes the development of internal IT concepts for Fraport. In the course of this successful cooperation GfL and Fraport agreed on a further project extension now running until Autum 2018. Find out more about our relevant services and download our flyer from the flyers area.

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October 2017: Dusseldorf Airport assigns update of HTML SMS Tool to version 4.0

At Dusseldorf Airport the HTML SMS Tool developed by GfL is applied inter alia allowing acquisition, management and auditing of safety-relevant events and processes. Now Dusseldorf Airport decided to upgrade their SMS tool to version 4.0 thus gaining additional functionalities and services: Besides general performance optimizations and simplified usability especially the support of mobile devices was implemented. After the update’s completion version 4.0 will be operated at four German international airports (Hannover Airport and the airports of Dresden and Leipzig/Halle). Find out more about its functionalities here > here resp. contact us in order to get your individual system solution.

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October 2017: GfL delivers safety assessment concerning external risks for island Foehr

The island Foehr belongs to the North Frisian Islands and to the district of North Frisia in federal state Schleswig-Holstein. In this context GfL was awarded to determine external risks (ER, see further information concerning the > methodology) induced by flight operations and their impacts on people on the island, especially focusing on the operation of a go-kart track close to the Wyk airport located on the island’s southeastern part. By applying GfL’s in-house developed ER model it was found that group and individual risks induced by flight operations are tolerable especially for the go-kart track’s visitors and staff as well as residents and holiday guests. To the extent of flight safety the go-kart track’s operation can be maintained in future.

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September 2017: Investigation of EASA compliance at Nuremberg airport during the operation of aircraft with higher ICAO code letter

Although the international airport of Nuremberg (IATA code: NUE) is currently applying the EASA certification for aerodrome reference code (ARC) 4C the operating company intends to handle code D (e. g. Boeing 757/767), code E (e. g. Airbus A340/A350) and code F (e. g. Boeing 748, Lockheed C-5 Galaxy) aircraft to a small extent as well. Higher code letters imply higher requirements related to the airport’s infrastructure (e. g. runway and taxiway width, minimum separation distances, strength of movement areas, obstacle requirements etc.) being not compliant as a consequence. In order to guarantee safe flight operations of aircraft with higher code letter nonetheless, GfL was assigned to analyze and assess the impact of these aircraft’s design characteristics on airport infrastructure, equipment/installations and operation according to EASA AMC1/GM1 ADR.OPS.B.090 "Use of the aerodrome by higher code letter aircraft".

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September 2017: Safety assessment concerning simple approach lighting system for precision approaches at airport Münster/Osnabrück

With regard to the airport’s infrastructure design there are particular specifications concerning the approach lighting system (ALS) according to EASA CS-ADR-DSN. These directives claim for the compliance of all dimensioning criteria of the ALS pursuant to the approach navigation facilities at the airport. At airport Münster/Osnabrück CAT I and CAT II/III (main landing direction) instrument landing systems (ILS) are installed. According to EASA, ILS CAT I should be operated with a precision approach lighting system (PALS): The PALS should consist of a row of lights on the extended runway centerline extending over a distance of 900 m from the runway threshold. However, at airport FMO there is currently a simple approach lighting system (SALS) with an overall length of 420 m. This aspect was classified as relevant for investigation by the competent authority. Therefore, GfL conducts a safety assessment using methods developed in-house derived from EUROCONTROL’s recommendations. Results will become available by the end of the year.

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July 2017: GfL supplies Hannover Airport with HTML SMS Tool version 4.0

At Hannover Airport the HTML SMS Tool developed by GfL is applied inter alia allowing acquisition, management and auditing of safety-relevant events and processes. Now Hannover Airport decided to upgrade their SMS tool to version 4.0 thus gaining additional functionalities and services: Besides general performance optimizations and simplified usability especially the support of mobile devices was implemented. At this point in time, altogether three German international airports, Hannover Airport and the airports of Dresden and Leipzig/Halle are using the newest version of our SMS tool. Find out more about its functionalities > here resp. contact us in order to get your individual system solution.

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July 2017: GfL delivers safety assessment concerning glare probabilities during approach and departure at Freiburg airport caused by photovoltaic systems

On behalf of the city Freiburg im Breisgau GfL analyzed possible glare of flight crews during approach and departure procedures at Freiburg airport within a risk assessment. Cause for this is the planned installation of photovoltaic modules in close proximity to the airport. For this purpose, glare probabilities caused by reflecting sunlight were quantified by using GfL’s in-house developed software GlareTech at first and operational consequences were estimated. Consequently, tolerable risks were identified following the ICAO PANS-ADR classification scheme. Effective risk mitigation measures were finally derived according to the ALARP philosophy allowing for safe flight operations.

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July 2017: Building plan for area in the vicinity of Frankfurt airport approved

In 2016 GfL conducted a comprehensive investigation on behalf of Fraport AG concerning a building site located west of Frankfurt airport direct beneath the extended centerline of runway 07L. In this framework GfL carried out an expertise focusing on the technical analysis and assessment of the subjects obstacle situation, external risks and hazards caused by wake vortices. Core topic was providing the evidence of safe flight operations despite the future construction of buildings within this area, especially taking into account the obstacle free zones according to EASA. On this basis, the building plan was recently approved by the competent municipal authority. Thus, GfL provided an important contribution bringing this task to a successful result and leading to the customer’s full satisfaction.

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June 2017: GfL delivers safety assessment concerning penetrations of obstacle protection surfaces of PAPI and approach lighting system at Airport Nuremberg

In the vicinity of the international airport of Nuremberg exist extensive forest areas. Because of their growth, several trees within these areas evolve into air traffic obstacles. In this respect it was found that the specific obstacle protection surfaces of the Precision Approach Path Indicator (PAPI) as well as the Precision Approach Lighting System according to EASA CS ADR DSN are partially penetrated by single or even groves of trees. These circumstances can lead to the hazard of limited visibility for cockpit crews on these lighting systems during approach. Subsequently the system’s basic functions resp. safety objectives (e.g. visual guidance for the aircraft’s alignment until touchdown) cannot be met. Within the scope of the safety assessment flight operational risks resulting from the lighting systems’ shadowing were examined. At first potential shadowing areas were identified taking into account the published approach angles at Nuremberg airport. Afterwards statistical analyses of flight trajectories based on radar data were conducted in order to quantify probabilities of aircraft flying into these shadowing areas. In consideration of possible damage severities concerning the hazard mentioned above risks were finally determined and assessed by using standardized procedures.

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June 2017: DFS assigns performance optimization of ETAS flight profile analysis tool by means of real-time data

After the successful acceptance of ETAS version 2.1 by Deutsche Flugsicherung GmbH (DFS) in January 2017 (see News January 2017), DFS now additionally assigned a performance optimization of ETAS. Therefore, real-time data for in total five aircraft types (inter alia Airbus A319, Boeing 737 and Boeing 777) gathered from flight data recorders were provided by DFS in order to optimize the performance of specific functionalities. The general aim is to enhance the computation results’ fidelity concerning fuel consumption as well as pollutant emissions of jet aircraft. First results will be expected in August 2017.

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June 2017: City of Freiburg im Breisgau publishes GfL’s report concerning the investigation of External Risks for visitors of the new SC stadium during football matches

The city of Freiburg im Breisgau seeks for a planning commitment to build a new football arena of SC Freiburg within close proximity to Freiburg airport. In the course of previous analyses (see > News Archive) the current investigation should clarify the compatibility of flight operations at the airport with the present stadium planning. The aim was to examine possible hazards and damages to uninvolved third parties induced by flight operations (e. g. in the event of an aircraft accident in direct vicinity to the future stadium), the so called External Risk (see further information concerning the > methodology ). In this context individual and group risks were calculated by applying different scenarios regarding everyday stadium operations, third-party events as well as the periods before, after and during a football match. The final risk assessment compared the individual risks to a generally accepted target level of safety and the group risks to specific boundary curves. As a result different risk mitigation measures were derived including the allocation of flight movements resp. suspension of flight operations.

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June 2017: GfL conducts flight performance calculations for new Airbus aircrafts at special-purpose airport of Hamburg-Finkenwerder on behalf of Airbus Operations GmbH

Airbus Operations GmbH assigned GfL to conduct flight performance calculations and the determination of required takeoff and landing distances by applying certified simulation and computation software Highlight and challenge at the same time is that these calculations are conducted for new and not yet regularly operated Airbus aircraft types (inter alia Airbus A380plus and A350-1000)! Thus, potential aircraft mass restrictions resp. adjusted available distances at the airport resulting from the performance data of these new types of aircraft will be derived. Besides, an assessment of infrastructural design criteria of the runway concerning EASA/ICAO is conducted taking into account necessary modifications of the movement area based on performance calculations.

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June 2017: GfL presents scientific publication at 12th ATM Seminar in the US

The ATM (Air Traffic Management Research and Development) Seminar having jointly been organized by FAA and EUROCONTROL as probably most important ATM event since 1997, focusses on the development of efficient and global solutions in the area of ATM. This year the conference takes place in Seattle, WA from June 27th until 30th 2017. Again GfL takes part in this internationally accepted expert conference presenting a paper with the title „Fuel Burn Estimation Modeling for ATM Benchmark Applications Perspectives from an International Collaboration“. This paper summarizes an initial collaboration between researchers from several globally recognized institutions (inter alia FAA and Airservices Australia) to address the question of fidelity of fuel estimation that may be required for different types of benefit assessments of Air Traffic Management improvements. For further information see > http://www.atmseminarus.org.

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May 2017: GfL supplies Mitteldeutsche Airport Holding with HTML SMS Tool version 4.0

The Mitteldeutsche Airport Holding operates the two airports Dresden and Leipzig/Halle in the federal state Saxony. At both airports the HTML SMS Tool developed by GfL is applied inter alia allowing acquisition, management and auditing of safety-relevant events and processes. Now the existing SMS was upgraded to version 4.0 and extended to specific functionalities. Besides general performance optimizations and simplified usability especially the support of mobile devices was implemented. Consequently, both airports are provided with an efficient SMS tool. Find out more > here resp. contact us in order to get your individual system solution.

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March 2017: Determination of glare probabilities during approach and departure at Freiburg airport caused by photovoltaic systems

On behalf of the city Freiburg im Breisgau GfL analyzes possible glare of flight crews during approach and departure procedures at Freiburg airport within a risk assessment. Cause for this is the planned installation of photovoltaic modules within close proximity of the airport. The general aim is to calculate reflection frequencies of sunlight in approach and departure areas taking into consideration the PV-modules’ exact position and alignment as well as the sun’s position depending on time of day and season. Hereafter, the probabilities of glare for aircrew during these periods of time are determined. Based on empirical analyzes possible damage severities caused by glare are identified and resulting operational risks are finally inspected for acceptance. Potential risk mitigation measures include alternative locations and alignment of PV-modules in regards to azimuth and elevation. For consideration of such questions, GfL’s in-house developed software GlareTech is applied. GlareTech is able to calculate glare effects induced by reflecting sunlight in a precise and rapid way, even for extensive PV-module areas. Thus, our customers benefit from short project durations. First results are expected in May.

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March 2017: Further electromagnetic compatibility studies (ILS and ASR) concerning a building’s renovation in the vicinity of the apron at Frankfurt/Main airport completed

The renovation planning of an office building located in the apron’s vicinity at Frankfurt/Main airport recently required electromagnetic compatibility studies of CNS facilities on the basis of § 18a LuftVG (german air traffic act) and requirements of the competent authority as well as Federal Supervisory Authority for Air Navigation Services (BAF). Once again the proven methodology was applied in cooperation with our partner FCS Flight Calibration Services GmbH (refer to news post February 2017). In order to guarantee detailed input data additional electromagnetic analyzes were conducted at measuring facilities of Physikalisch-Technische Bundesanstalt (PTB, Germany's national metrology institute). The aim was to measure the damping behavior of specific facade materials and the results were subsequently implemented into the electromagnetic simulations of stray fields. Thereby, an unique accuracy concerning the implementation of radar facility parameters and their reflection behavior when impinging the building’s surface is achieved and ensured.

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February 2017: Electromagnetic compatibility studies (ILS and ASR) concerning new fire station at Frankfurt/Main airport completed

Within the scope of the construction planning of a new fire station in the south of Frankfurt/Main airport an electromagnetic compatibility study for relevant CNS facilities has to be carried out according to § 18a LuftVG (german air traffic act) and requirements of the competent authority as well as Federal Supervisory Authority for Air Navigation Services (BAF). In cooperation with our partner FCS Flight Calibration Services GmbH, being specialized in high frequency technology, and on behalf of Fraport AG potential interferences between the fire station and the operation of radar and navigation facilities were analyzed. Especially the runways’ localizer and glide slope antennas (ILS), the airport surveillance radar (ASR) and in particular the secondary surveillance radar (SSR) can be affected by disruptive interferences. The assessment of radar facilities is based on state-of-the-art solver software for near and far field simulations permitting the determination of electromagnetic stray fields by using a hybrid method consisting of the Method of Moments (Mom) and Physical Optics (PO). By this technical testing procedure we can offer the currently most modern and most reliable methodology. In the course of the stray field analyzes risk mitigation measures concerning façade construction and material selection were examined. Furthermore, the assessment’s approach was co-ordinated with Deutsche Flugsicherung GmbH (DFS) as operator of the CNS facilities in the project’s early stage. Thus, an unique accuracy concerning the implementation of radar facility parameters is achieved and ensured.

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January 2017: Development of innovative flight planning software for commercial airliners – research project „ProfiFuel“ funded by BMWI launched with project partners JEPPESEN and TU Dresden

Within the scope of the federal aviation research program (LuFo) the consortium lead by JEPPESEN has been awarded the contract to research and develop new flight planning solutions for on-board supporting systems (Electronic Flight Bag, EFB). With ProfiFuel, GfL aims at specifically refining its software products for on-board application, being already successfully introduced to the market. Along ProfiFuel we will develop special avionic tools allowing real-time displaying of environmental and economical flight trajectories especially for airlines resp. cockpit crews in order to support decision making. JEPPESEN is market leader for EFB systems and TU Dresden has been developing multi-criteria optimization software for flight planning purposes for years. ProfiFuel will run for three years – we keep you informed!

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January 2017: Norwegian ANSP AVINOR assigns update of runway capacity assessment for Oslo airport

In 2006 GfL first assessed the capacity of the parallel runway system at Oslo. At that time, the planning vision of a third runway for Norway’s largest airport was focused. This masterplan ist still valid, however several extensions on the airside were realized in the meantime. Furthermore innovative approach and departure procedures were implemented, inter alia the Point Merge System (PMS) and RNP AR approach procedures. GfL has been awarded the contract by Norwegian ANSP AVINOR (also operating the Oslo airport) to extensively update the capacity values of the runway system. Therefore, analytical Statistical Queuing Models as well as fast-time simulations will be used. Results are expected for May 2017.

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January 2017: DFS approves flight profile analysis tool ETAS being extended by new features (Version 2.1)

After successfully delivering ETAS 2.0 (fuel consumption calculation of jet aircraft) to DFS in September 2016 (see news September 2016) GfL has been providing the tool’s expansion to DFS by adding further features. Now version 2.1 also permits calculations of fuel consumption for aircraft with turboprop engines. In addition, calculation routines were implemented allowing to determine pollutant emissions (e.g., NOX, COX, soot etc.) for both kinds of engines. Thus DFS has now an efficient computing environment for analyzing and evaluating specific fuel consumption as well as pollutant emissions for daily conducted flights. Consequently the current version ETAS 2.1 can help to optimize flight trajectories towards fuel and all other relevant emissions thus allowing to reduce greenhouse gas emissions.

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