a7_cee4674_2011_sol

# a7_cee4674_2011_sol - CEE 4674 Airport Planning and Design...

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CEE 4674: Airport Planning and Design Spring 2011 Assignment 7: Capacity Solution Instructor: Trani Problem 1 An airport shown in Figure 1 has a single 9,500 feet runway oriented East-West. The airport has a standard airport surveillance radar (ASR) which tracks aircraft up to 65 miles form the airport site. The radar has a scan rate of 5 seconds. Tables 1 and 2 show the typical ATC separations at the airport under IMC conditions. Assume the minimum separations under VMC conditions are reduced by 10% from those observed under IMC conditions. The airport has the following technical parameters: a) in-trail delivery error of 18 seconds (because there is a radar at the site), b) departure-arrival separation for both VMC and IMC conditions is 2 nautical miles, c) probability of violation is 5%. Arriving aircraft are “vectored” by ATC to the final approach fix located 8 miles from the runway threshold. Arrivals follow in-trail after crossing the final approach fix. The airport aircraft mix, runway occupancy times and approach speeds are shown in Figure 1. Cannot use the FAA Airfield Capacity Model to solve this example. However, you are allowed to modify the spreadsheet provided in class to solve the problem. Show me sample calculations for both opening and closing cases. a) Calculate the arrival-departure saturation capacity diagram (Pareto diagram) under IMC conditions (show all your work). Include one point to estimate the departure capacity with 100% arrival priority under mixed runway operations. b) Repeat part (a) for VMC conditions. Comment on the differences observed. Specifically, comment on the number of departure values obtained with 100% arrivals. Figure 1. Airport Arrival and Departure Operational Procedures for Problem 1. Table 1. Minimum arrival-arrival separations under IMC conditions. Values in are nautical miles. Values Shown Do Not Include Buffers. CEE 4674 Trani Page 1 of 14

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Table 2. Minimum departure-departure separations under IMC conditions. Values in are seconds. ______________ Solution ______________ The arrivals-only saturation capacity is 29 per hour. The departures-only saturation capacity is 44.8 per hour. The IMC Pareto diagram is shown below. CEE 4674 Trani Page 2 of 14
Figure 2. IMC Pareto Diagram for Single Runway Airport. Figure 3. VMC Pareto Diagram for Single Runway Airport. CEE 4674 Trani Page 3 of 14

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Problem 2 Answer this question in relation to the airport described in Problem 1. NextGen is the set of technologies that FAA is trying to develop to improve capacity of the NAS including the capacity of airports. One of the key technologies is the use of satellite- based surveillance called ADS-B Out. Read the article on ADS-B out ( http://en.wikipedia.org/wiki/Automatic_dependent_surveillance-broadcast ) and answer the following questions: a) Year when all aircraft are expected to be equipped with ADS-B out. Year 2020 b) How many ADS-B protocols or standards are available today? Two protocols: 1090 ES and UAT c) Briefly explain some of the benefits of ADS-B for General Aviation. Traffic information (poor-man’s TCAS),
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a7_cee4674_2011_sol - CEE 4674 Airport Planning and Design...

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