Airport Surface Surveillance Capability (ASSC) System Industry Day Terrence Johnson - Project Lead September 30, 2010 Federal Aviation Administration
What is the Airport Surface Surveillance Capability (ASSC) System? • • The ASSC system shall fuse multilateration ground sensor data with Automatic Dependent Surveillance Broadcast (ADS-B) equipped aircraft information for display on an FAA certified airport tower controller display (included as part of the ASSC configuration). The ASSC system shall have the capability of providing data to other external FAA systems (i. e. Surveillance Broadcast Services (SBS), Runway Status Lights (RWSL), and Terminal Data Distribution System (TDDS)). The ASSC system shall track surface vehicles/aircraft providing information for Air Traffic Control (ATC) services, and to provide pilot/vehicle operator improved situational awareness through ADSB Traffic Information System Broadcast (TIS-B) services. Using the TIS-B data, pilots/vehicle operators with ADS-B equipped receivers will be able to locate the position of other non ADS-B equipped aircraft or vehicles. Airport Surface Surveillance Capability (ASSC) System Industry Day (DRAFT) September 30, 2010 Federal Aviation Administration 2
ASSC System Interfaces FAA Automation RWSLP TDDS TIS-B = MLAT 1090/978 SDP CS ADS-B • 978 282 B • 1090 260 B MLAT RADIO • 260 A – Current 2010 • 282 A – Current 2010 • 260 B – Required • 282 B – Required § ASSC System Infrastructure (Conceptual) § FAA SBS (Surface/Terminal/En Route) Infrastructure § FAA RWSL Infrastructure § FAA TDDS Infrastructure § FAA Terminal/En Route Automation Infrastructure • 1090 260 B – Required • 978 282 B – Required GS DD RMS TP GS DP Display SREFT Airport Surface Surveillance Capability (ASSC) System Industry Day (DRAFT) September 30, 2010 Federal Aviation Administration 3
ASSC System Acronym Definitions • • • RMS: TP: DP: GS: SREFT: DD: SDP: CS: RWSLP: TDDS: Remote Maintenance Subsystem Target Processor Display Processor Ground Sensor System Reference Transmitter Data Distribution Service Delivery Point Control Station Runway Status Light Processor Terminal Data Distribution System Airport Surface Surveillance Capability (ASSC) System Industry Day (DRAFT) September 30, 2010 Federal Aviation Administration 4
ASSC System Critical Requirements (from the Market Survey) • These critical requirements are not intended as all-inclusive nor listed in order of importance: – – – – Must be able to receive, multilaterate, and process target data on 1090 MHz (ATCRBS/Mode S) and 978 MHz (UAT) frequencies. The 1090 MHz processing shall be in accordance with Minimum Operational Performance Standard (MOPS) DO 260 B. The 978 MHz processing shall be in accordance with MOPS DO 282 B. Must have a GPS independent time reference for multilateration calculations. Must be able to interrogate target transponders (ATCRBS/Mode S) on 1030 MHz. Must be able to interface with SBS to receive and process FAA provided ADS-B source data. Must be capable of receiving multiple inputs in ASTERIX formats (e. g. cat 023 status messages and cat 033 target messages). Must have the capability to output data in ASTERIX format through a secure interface to external users (e. g. cat 011 system track data, cat 010/cat 033 ADS-B reports, and cat 010 multilateration track data). Airport Surface Surveillance Capability (ASSC) System Industry Day (DRAFT) September 30, 2010 Federal Aviation Administration 5
Key ASSC System Requirements • Target Capacity – Shall be capable of tracking 200 combined real surface and approach (arrival) targets. • Probability of Detection – Shall be at least 93% for Mode S, 74% for ATCRBS, and 93% for UAT within the coverage volume. • Position Accuracy – Shall calculate a 3 D or a 2 D-multilateration position. – Shall be less than or equal to 20 feet RMS error for every 100 contiguous feet of taxiway and runway. – Shall be less than or equal to 296 feet (0. 05 nautical miles) RMS from the threshold out to 1. 7 nautical miles in the approach corridors. – The time difference of arrival (TDOA ) RMS error shall be less than 13. 4 nanoseconds for TDOA values used in calculating a plot’s position. • Identification accuracy – ID swapping for Mode S, Mode A, manually entered data tags, and system track numbers shall occur in less than 0. 01% of track updates. – The number of tracks for which the system incorrectly identifies automatically (either the Mode S code, Mode A code or Flight ID) for more than 5 seconds shall be less than 1 in 1000 tracks. • Processing Legacy ATCRBS & Mode S – Shall be backward compatible with RTCA MOPS DO-260/260 A transponders. Airport Surface Surveillance Capability (ASSC) System Industry Day (DRAFT) September 30, 2010 Federal Aviation Administration 6
Key ASSC System Requirements (cont. ) • Spectrum – Shall conform to Section 2. 4. 2. 1. 2 “Receiver Characteristics”; Section 2. 2. 3 “Compatibility with Other Systems”; Section 2. 2. 3. 8 “Transmit Pulse Characteristics”; and Section 2. 2. 4. 4. 2 “Reply Detection and Decoding” of RTCA/DO-185 B. – Shall operate in accordance with the Manual of Regulations and Procedures for Radio Frequency Management (47 Code of Federal Regulations (CFR) Part 300). – Shall ensure electromagnetic compatibility with other licensed radio frequency systems. – ASSC data or electromagnetic compatibility studies required to obtain spectrum certification shall be prepared and provided to the FAA. – Total “off time” due to suppression or interrogation caused to a victim transponder shall NOT exceed 0. 0025 sec/sec. – The total replies that the Multilateration subsystem elicits from a victim ATCRBS transponder shall NOT exceed 10 in 0. 25 sec. Airport Surface Surveillance Capability (ASSC) System Industry Day (DRAFT) September 30, 2010 Federal Aviation Administration 7
Key ASSC System Requirements (cont. ) • False Track Rate – Dual and duplicate tracks shall NOT occur more than once per 12 hour period. – Shall employ use of resolution minimums of supporting sensors to avoid the merging of separate targets. – Shall identify the merging of separate targets and automatically separate tracks upon two successive determinations of 150 foot positional separation on the surface of plot reports or upon receipt of conflicting aircraft ID, Mode 3/A, or Mode S information. – Shall detect track swap conditions based on velocity and identification data and corrected within 3 seconds for moving targets, if a track is supported by more than one sensor, . – The false system track rate due to ADS-B false tracks shall be no more than 1 per 30 days. – The false track rate for MLAT tracks shall be: • ATCRBS-supported tracks - less than 1 percent of ATCRBS-initiated tracks. • Mode S-supported tracks - less than 1 in 1000 Mode S-initiated tracks. • UAT- supported tracks - less than 1 in 1000 UAT initiated tracks. Airport Surface Surveillance Capability (ASSC) System Industry Day (DRAFT) September 30, 2010 Federal Aviation Administration 8
Key ASSC System Requirements (cont. ) • False Track Rate (cont. ) – Shall report when an aircraft’s reported ADS-B position is: • on the surface - greater than 100 feet away from the system track position derived from multilateration • within 1. 7 nautical miles of the runway threshold - greater than 500 feet from the system track position derived from multilateration. • Update Rate – Shall provide target/track updates at a minimum of a once per second basis. • Reliability – Shall have an MTBF of more than 2190 hours. – Shall have an MTTR of less than 30 minutes. – Shall include backup of all system setup, optimization and calibration files as well as software and firmware. – Shall provide a means of recovery in case of a system failure. • Data Fusion (Inputs are MLAT and SBS/ADSB) – Shall initiate and update system tracks on the basis of incoming plots from any sensor. Airport Surface Surveillance Capability (ASSC) System Industry Day (DRAFT) September 30, 2010 Federal Aviation Administration 9
ASSC System Significant Issues • Explain Safety Logic Philosophy – Identify landers / departures accessing a closed runway – Identify how potential collisions are determined. • How is “time till impact” calculated for arrivals/departures/aircraft on the surface. – How / What can be Adapted? • Problems Encountered and Their Resolution – Describe typical potential collision scenario(s) and how they are handled. – Identify issues with Land & Hold Short operations, angle of intersection between intersecting runways or runway and taxiway. – With respect to the track’s position, where is the plane’s nose? Where is its tail? Airport Surface Surveillance Capability (ASSC) System Industry Day (DRAFT) September 30, 2010 Federal Aviation Administration 10
Other ASSC System Issues of Interest • • • How will MLAT and SBS positions be validated? What is your installation philosophy? – (What happens / When / Describe optimization process) What happens when the movement area changes? Test / Integration / Lab Facilities Philosophy – (How are deficiencies or enhancements handled? ) What sort of maintenance is expected? What sort of cyber security is provided? Describe wireless technology that may be used for temporary or permanent Multilateration Subsystem Sensors (MSS). What sort of data logging and playback is provided? Government retains rights to source code (maintenance/ownership) Government is open to tailoring the specification to support the application of COTS to meeting the key site dates. Airport Surface Surveillance Capability (ASSC) System Industry Day (DRAFT) September 30, 2010 Federal Aviation Administration 11
The ASSC System Schedule • Must be deployed to 9 sites, including all necessary FAA verification and operational testing, according to the following schedule: – 1) Co-Key Sites 18 Months after award. • CLE - Cleveland-Hopkins International Airport • SFO - San Francisco International Airport – 2) Seven (7) remaining sites by CY 2015. • • ADW - Andrews Air Force Base ANC - Anchorage International Airport CVG - Cincinnati/Northern Kentucky International Airport MCI - Kansas City International Airport MSY - New Orleans International Airport PDX - Portland International Airport PIT - Pittsburgh International Airport Surface Surveillance Capability (ASSC) System Industry Day (DRAFT) September 30, 2010 Federal Aviation Administration 12
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