Satellite Data-Link Communication Seminar GOLD Data Analysis 8 February 2012

Contents GOLD Data Analysis Overview CPDLC message sets / ADS-C downlink reports Performance Measures Examples of Aggregate CPDLC and ADS-C Monthly Performance RCP240 and RSP180 for SAT, VHF RCP400 and RSP400 for HF Examples of Performance by Specific Factor Station Identifier Operator Operator/Aircraft type/Airframe

GOLD Analysis Overview: CPDLC Message Set The guidance in the Global Operational Data Link Document (GOLD) specifies the message sets to be considered All uplink communications transfer messages and typical intervention messages such as climb clearances with an observed CPDLC “WILCO” response attribute are assessed These messages are considered to be intervention messages critical to the communications used when applying reduced separation standards Uplink elements containing route clearances (UM79, 80, 83) are removed from message set FAA is developing and deploying decision support tools to aid the air traffic controller. DSTs have many functions such as probing for aircraft-aircraft and/or aircraft-airspace conflicts, safely and efficiently metering aircraft into airports, and providing advisors to air traffic management specialists that specific regions of airspace will reach capacity levels. Fundamental to all these DSTS is the trajectory modeler function which generates aircraft trajectory predictions. An aircraft trajectory is the actual or prediction of the four-dimensional path of the aircraft. Each DST has required levels of accuracy for its trajectory predictions based on its unique functions and capabilities.

GOLD Analysis Overview: CPDLC Performance Measures Actual Communication Performance (ACP) Total time required by the communication transaction Begins when the CPDLC uplink message is sent to aircraft Ends when the WILCO is received Actual Communication Technical Performance (ACTP) Time required for the message delivery part of the communication transaction, includes: CPDLC clearance uplink transit time WILCO downlink transit time Pilot Operational Response Time (PORT) Time required for crew response Estimated by ACP - ACTP

GOLD Analysis Overview: CPDLC Performance Measures

GOLD Analysis Overview: ADS-C Messages and Performance Measure Surveillance Latency All downlink ADS-C messages are included Measures transit time for downlink message delivery Begin time estimated by timestamp of aircraft when sent End time estimated by timestamp of ATC receipt

GOLD Analysis Overview: Interpreting GOLD Charts In this example: the observed performance meets the 95% criteria but does not meet the 99.9% criteria, the latency of 95% of downlink ADS-C messages in data set is within 37 seconds the latency of 99.9% of downlink ADS-C messages in data set is not within 240 seconds

GOLD Performance Criteria Performance Measure Percent of Messages Required to Meet Criteria RSP180 Criteria (sec) RSP400 Criteria (sec) RCP240 Criteria (sec) RCP400 Criteria (sec) ADS-C Latency 95% 90 300 -- 99.9% 180 400 ACTP 120 260 150 310 ACP 320 210 370 PORT 60

Examples Monthly Performance

Summary of Observed Datalink Media Usage Percent of ADS-C Messages Percent of RCP CPDLC Messages SAT 86.4% 96.2% VHF 11.9% 1.6% HF 1.7% 1.2% Mixed Media -- 1.0%

Examples Performance by Station Identifier

Station/Gateway Identifiers Satellite GES Location(s) SITA ARINC Inmarsat I‑3 Aussaguel, France: AOW2 AOE2 -- Eik, Norway: AOW3 AOE3 IOR5 XXE Perth, Australia: POR1 IOR2 Santa Paula, California, US: POR4 XXC Inmarsat I‑4 Fucino, Italy EUA1 XXF Paumalu, HI, US APK1 AME1 XXH MTSAT Kobe and Hitachiota, Japan MTS1 Iridium Phoenix, Arizona, US IGW1 IG1

Examples Performance by Operator

Observed Datalink Performance by Operator July to December 2011 Code Count of ADS-C % of Total ADS-C ADS-C 95% ADS-C 99.9% Count of CPDLC % of Total CPDLC ACTP 95% ACTP 99.9% ACP 95% ACP 99.9% PORT 95% BB 63,168 12.10% 99.29% 99.49% 4,040 11.19% 99.03% 99.13% 99.01% 99.36% 95.99% AA 61,842 11.85% 99.27% 99.73% 6,452 17.87% 99.75% 99.84% 99.66% 96.84% L 42,893 8.22% 97.00% 3,389 9.39% 98.76% 97.79% 98.41% 92.09% FF 38,619 7.40% 97.57% 99.16% 2,955 8.18% 99.05% 99.26% 98.98% 99.32% 96.07% DD 34,017 6.52% 97.01% 2,674 7.41% 98.95% 99.59% 97.83% 98.43% 91.29% GG 25,263 4.84% 99.47% 99.83% 1,545 4.28% 99.74% 99.81% 95.92% EE 24,055 4.61% 98.97% 99.38% 1,835 5.08% 99.46% 99.62% 98.86% 99.24% 93.24% HH 20,532 3.93% 99.64% 99.72% 1,026 2.84% 99.61% 99.71% 99.42% 96.00% R 19,717 3.78% 97.13% 99.58% 936 2.59% 98.72% 99.04% 99.68% 95.94% JJ 18,052 3.46% 99.92% 666 1.84% 100.0% 98.65% 93.69% A 15,255 2.92% 95.91% 98.70% 583 1.61% 98.28% 98.63% 98.46% 95.03%

Observed Datalink Performance by Operator July to December 2011 (Continued) Code Count of ADS-C % of Total ADS-C ADS-C 95% ADS-C 99.9% Count of CPDLC % of Total CPDLC ACTP 95% ACTP 99.9% ACP 95% ACP 99.9% PORT 95% M 14,559 2.79% 93.34% 96.58% 728 2.02% 95.74% 96.43% 94.37% 95.88% 91.07% CC 14,503 2.78% 97.38% 98.71% 1,175 3.25% 99.15% 99.23% 98.81% 99.32% 94.30% PP 11,553 2.21% 99.79% 719 1.99% 99.44% 100.0% 99.72% 95.69% LL 11,429 2.19% 99.08% 99.55% 1,343 3.72% 99.48% 99.26% 97.24% MM 11,293 2.16% 99.75% 99.93% 555 1.54% 99.64% 99.28% 99.46% 96.04% KKKK 11,031 2.11% 99.82% 99.87% 1,204 3.33% 99.92% 99.17% 99.50% 95.51% SS 10,862 2.08% 98.29% 99.51% 504 1.40% 99.60% 98.41% 99.01% 92.06% ZZZZ 9,620 1.84% 94.94% 96.30% 414 1.15% 98.31% 98.79% 96.38% 96.62% 88.65% WW 6,858 1.31% 96.44% 98.38% 256 0.71% 98.05% 98.44% 97.66% 96.88% DDDD 6,831 99.96% 581 1.61% 99.14% 99.83% 95.52%

Examples Performance by Operator/Aircraft Type

Examples Performance by Operator/Airframe