International Civil Aviation Organization Status of industry standards for GNSS CAR/SAM ATN/GNSS Seminar Varadero, Cuba, 6 to 9 May 2002 Presentation GNSS 4.1 by E. Chatre

Industry Standards : Where do they fit ? ICAO SARPs SIS MASPS MOPS Receivers MOPS Ground equipments

EUROCAE The European Organisation for Civil Aviation Equipment (EUROCAE) was created in 1963. Forum in Europe where administrations, airlines and industry could meet to discuss technical problems It develops minimum performance specifications for airborne and ground electronic equipment. EUROCAE documents are considered by Joint Aviation Authorities to be referenced by the Joint Technical Standard Orders The main European administrations and the main aircraft and equipment manufacturers are members of EUROCAE Relevant groups for GNSS are WG 28 and WG 62

RTCA RTCA is a non profit organisation in the United States (Headquarters in Washington DC) Powerful forum for standardisation of aviation user equipment FAA is using these standards as a basis for Technical Standard Orders (TSOs) used during aircraft certification Strong involvement of industry (airframe manufacturer, ground and airborne equipment manufacturers, FAA…) Very active in the frame of GNSS : relevant group is SubCommittee SC 159

Minimum Operational Performance Specifications (MOPS) This is one of the standards developed by both EUROCAE and RTCA. It specifies technical charateristics for either airborne or ground sub-systems. Typical table of Content is : Introduction/Purpose Classification of equipments Technical requirements Testing requirements Installed performance section

EUROCAE WG 28 : GPS SG 1 was in charge with SBAS (EGNOS, WAAS) : dormant SG 2 is in charge with GBAS ground segment ED 95 (Nov 99) : MASPS GBAS Cat I Preparation of ED 95A (update based on latest ICAO GNSSP definition of GBAS) Preparation of MOPS for ground station (End 2002) SG 3 is in charge with Multi Mode Receiver Preparation of ED 88A MOPS for MMR including GBAS SG 4 is in charge of preliminary studies on Cat II/III

EUROCAE WG 62 : GALILEO Working group created to deal with standardisation of GALILEO First meeting held on January 15th Objectives To produce a list of working assumptions for the operational concept for use of GNSS Draft version by the end of 2002 Consolidated version in 2003 To produce a MOPS for airborne equipment Initial MOPS for development of receiver end 2004 Final MOPS issued by 2008 To develop documentation for standardisation of precision approach equipment (ground and airborne) This will be done in conjunction with WG 28

RTCA SC-159 WG 1 is working on definition of GPS L5 ICD GPS ICD 706 is available Discussions are also ongoing on L5 signals on geostationary satellites for use within SBAS WG 2 is working on SBAS (WAAS, EGNOS…) DO 229 C is available. Improvements are on-going Work on DO 229 D will start to deal with definition of requirements linked to APV operations and to include L5 related requirements. WG 2C develops guidance for integration of GPS and INS Current material is available as part of DO 229 Appendix R

RTCA SC-159 WG 4 is handling all matters related to GBAS DO 245 MASPS for Cat I LAAS DO 246 ICD for LAAS Updates of DO 245 and 246 to ensure compliance with ICAO GBAS standards adopted by GNSSP DO XX : MOPS for Cat I LAAS receiver Activities recently launched to derive performance requirements for Cat II/III operations. WG 5 is dealing with Airport Surface Operations WG 6 is handling interference DO 235 Assessment of radio frequency interference relevant to GNSS Work will start in August to work on a similar assessment for the E5/L5 band

Conclusions ICAO standards (SARPs) developed by GNSSP are mainly focused on Signal In Space definition and ensure safety and Interoperability Industry standards developed in Europe and the US are focused on ground and airborne user equipment and are quite detailed MOPS are usually defining test procedures for equipment qualification National regulation often call these industrial standards (TSOs or JTSOs) Necessary in the frame of aircraft certification scheme