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Unformatted text preview: CEE 5614: Analysis of Air Transportation Systems Fall 2011 Assignment 5: Capacity Analysis
Date Due: November 9, 2011 Instructor: Trani Problem 1
Read the technical paper entitled “Air ground collaboration through delegated
separation: Results of simulations for arrivals to closely spaced parallel runways” by
Domino, D.A.; Tuomey, D.; Mundra, A.; Smith, A.; Stassen, H.P.; and make a summary
of the points stated in the paper in two pages (doubled spaced). This article appeared in
the Integrated Communications, Navigation and Surveillance Conference (ICNS), 2011.
State some of the challenges to conduct parallel approaches to closely parallel
runways. You can obtain the article by logging in to the VT library (see ﬁgure below). CEE 5614 A5 Trani Page 1 of 4 Problem 2
Use Google Earth to help you answer the following question.
a) Read about the SOIA approaches at SFO and state the beneﬁts and weather
conditions that force this airport to use such approaches. I suggest you read the
media document http://www.ﬂysfo.com/web/export/sites/default/download/about/
news/pressres/ref/pdf/weatherops.pdf before others. b) Using the NAS_Operations ﬁle provided, ﬁlter the arrival and departure operations
to SFO. Plot the number departures per hour and arrivals per hour as a function
of time (i.e., for a 24-hour period). Recall that all times provided in the FAA ETMS
data are UTC times (London time) and need to be converted to local SFO times
(SFO time is -8 hours from London). c) In the same plot draw horizontal lines representing the restricted IMC and PRM/
SOIA (marginal weather) capacities. Comment on the demand vs capacity at the
airport under IMC and marginal weather conditions. d) Using the IMC runway arrival capacity for arrivals found in part (b) and using a
deterministic queueing model (D/D/1) estimate the average delays to aircraft
arrivals at SFO. e) Repeat (d) for marginal weather conditions. Comment on the beneﬁt of the PRM/
SOIA approach procedure. Problem 3
You are expected to perform a capacity analysis for the airport shown in Figure 1. The
airport has a standard airport surveillance radar (ASR) which tracks aircraft up to 60
miles form the airport site. The radar has a scan rate of 4 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
15 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 CEE 5614 A5 Trani Page 2 of 4 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. the
IMC separation matrices are shown in Tables 1 and 2. Figure 1. Airport Arrival and Departure Operational Procedures for Problem 1. CEE 5614 A5 Trani Page 3 of 4 Table 1. Minimum arrival-arrival separations under IMC conditions. Values in are
nautical miles. Values Shown Do Not Include Buffers. Table 2. Minimum departure-departure separations under IMC conditions. Values in are seconds. a) Calculate the arrival-departure saturation capacity diagram (Pareto diagram) under
IMC conditions (show all your work). Because of the shorter runway 36, no superheavies and heavies are allowed to takeoff on runway 36. Runway 04 is used by all
classes of aircraft. In your analysis, assume all aircraft, irrespective of their wake class,
accelerate at an average of 2.5 m/s2 on takeoff roll.
b) Suppose that under new NextGen operations, the in-trail delivery error is reduced to
5 seconds and the common approach path is reduced to 5 nm. Find the beneﬁt to
arrival capacity of the airport. Comment on may happen to the departure saturation
capacity of the airport. CEE 5614 A5 Trani Page 4 of 4 ...
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