RealContours™ converts aircraft flight track data into Federal Aviation Administration's Integrated Noise Model (INM) input data, runs the INM, and provides the INM results based on the modeling of each individual flight track.

The latest release, RealContours™ Version 2 or "RCV2", is a remotely-hosted system accessible through the Internet, eliminating the need to purchase equipment and making results readily available to the user through a secure web interface with detailed mapping. Flight track data is transferred daily (or on another schedule) to the HMMH datacenter and is processed and modeled with the latest version of INM. The datacenter is based on an expandable platform so that single- or multi-day runs can be processed based on the needs of the user. This also allows agencies with more than one airport to have all airports modeled with results available at the same time. The flight tracks used in the modeling can be viewed in the same interface and can be selected for additional modeling options.

Modeled results, including ESRI Shapefiles of the contours and details of the modeling, can be downloaded for each day. These daily results are then used to develop annual contours by averaging the results over the selected time period. The website also allows the user to compare contours and animate contour results over a selected time period.

RCV2 processes the flight track data to assign correct runways, joins broken tracks and performs other processing algorithms to provide the INM with appropriate modeled flight tracks.  Also new with RCV2 is the ability to separate pattern operations to achieve more accurate modeling at airports with aircraft training operations.  RCV2's benefits over traditional noise modeling include:

  • assigning an INM aircraft type based on the flight track data available for each particular flight
  • modeling the aircraft operation on the actual runway used by each flight
  • modeling the aircraft operation at the time it actually occurred
  • modeling along the actual flight path flown, and
  • modeling using an INM profile that best matches the radar profile or assigning the appropriate INM stage length based on the city pair contained in the flight plan data.
Clients can login to RCV2.

Meeting FAA Guidelines

HMMH has developed a proprietary technique to compare radar flight track altitude profiles to all available INM standard profiles to find the best matches possible for modeling. 14 CFR Part 150, Sec. B150.3 and FAA Order 1050.1E, Par. 13b, Attachment 2, Change 4 require that a complete record of inputs to INM and the resulting log files be maintained for each INM run. By using INM standard profiles and maintaining inputs and logs, RealContours exceeds FAA’s best modeling practices and computational requirements.

RealContours logo

Quarterly Reports

HMMH is under contract with OAK to produce their CA Title 21 Quarterly noise monitoring reports.  RealContours is used to produce the data for these reports in an efficient and cost effective manner. The link below will take you to the Oakland International Airport noise monitoring reports page.  The CA Title 21 reports are the second set down from the top.

Quarterly Contours

The following airports utilize RealContours to develop their CA Title 21 Quarterly noise contours.  Realcontours produces daily contours at these airports which are easily combined to produce the 365 day contour needed for the CA Title 21 contour graphic.