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ARINC’s Role in MDCRS

ARINC’s Role in MDCRS. MDCRS Management Team September 7, 2006. Agenda. History of MDCRS and where we are today Airline Participation Overview of MDCRS Data Processing and Communications. History of MDCRS.

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ARINC’s Role in MDCRS

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  1. ARINC’s Role in MDCRS MDCRS Management Team September 7, 2006

  2. Agenda • History of MDCRS and where we are today • Airline Participation • Overview of MDCRS Data Processing and Communications

  3. History of MDCRS • In 1986 Dr. John McCarthy recommended an automated aircraft reporting system for collecting weather observations. • ARINC fielded MDCRS in March 1991 • FAA funded development of MDCRS server and operation of the service • 3 Participating airlines; DAL, NWA, UAL • AAL, FedEx, and UPS participation added. • Government initiated reimbursement for partial costs incurred by airlines in 2003. • SWA joined in 2005. • Most recent contract between FAA and ARINC effective June 2006 with option periods through March 2011.

  4. Airline Participation • Today’s numbers • 7 participating airlines • AAL, DAL, FedEx, NWS, SWA, UAL, UPS • 1500 aircraft report Winds and Temps • 60 UAL a/c report Turbulence (EDR) • 25 UPS 757s report Water Vapor • 100,000 observations per day (3M per month) • Participating airlines collectively receive about $30K/month from the Government as cost reimbursement

  5. Airline Participation – 1462 aircraft (June 2006) • American – 265 • 737, 757, 767, 777 • Delta – 375 • 737, 757, 767, 777, MD88, MD90 • Fed Ex – 194 • A300, A320, MD10, MD11 • Northwest – 41 • 757 • United – 413 • A319, A320, 737, 757, 767, 747 • UPS – 124 • 757, 767, MD11 • SWA – 50 • 737

  6. Airline Participation – No. of Observations • 3,291,986 Observations from reporting aircraft – June 2006

  7. Computers Airline NADIN II BUFR Messages ACARS ARINC Data Network Service NOAA GSD-ESRL Central Processor ARINC Packet Network NOAA NCEP BUFR Messages ACARS MDCRS Server MDCRS Data Processing by ARINC

  8. Content of Typical MDCRS Messages • Header info contains Aircraft ID, Departure Station, Destination Station. • Time of Observation – Day, Hour, Minute (6 char.) • Latitude in Deg, Min, Tenths (6 char.) • Longitude in Deg, Min, Tenths (7 char.) • Pressure Altitude, feet (4 char.) • Wind Direction (3 char.) • Wind Speed (3 char.) • Static Air Temperature – degrees C (4 char.) • Roll Angle Flag (1 char.) • Phase of Flight (when available) (4 char.) • Turbulence (when available) (4 or 5 char.) • Icing (when available) (4 char.) • Water Vapor Mixing Ratio (when available) (4 char.)

  9. ARINC Processing • Recognize ACARS message is a MDCRS message and route to MDCRS processor • Decrypt, if necessary • Remove header, extract raw wx observation data • Tag with airline and aircraft ID using codes supplied by NWS • Validate format • Convert data to BUFR format • Batch BUFR messages and send to NWS approx every 15 min. • Send ACARS messages in ASCII format to GSD-ESL.

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