Unformatted text preview: CEE 5614: Analysis of Air Transportation Systems Fall 2011 Quiz 2: Take Home
Date Due: December 9, 2011 (via email) Instructor: Trani Problem
The airport shown in Figure 1 is to be studied under VMC conditions. The airport has
two runways used in segregated mode as shown in the diagram. Arrival trafﬁc is
metered and sequenced at two Navaids called VOR1 and VOR2. For metering
purposes, aircraft are required to cross the VORs at FL 220 and at about 380 knots
(true airspeed). A sample scatter velocity proﬁle measured at a similar airport in the U.S.
is shown in Figure 2. Figure 2 shows the nominal speed vs. distance traveled proﬁle for
arrivals at a large hub airport in California. Figure 2 shows the runway located 78 nm
from the point where aircraft are initially tracked inside the terminal area. Figure 3
shows the altitude vs. distance traveled proﬁles for the same airport. In your analysis
use the nominal descent proﬁles (red lines).
The airport has an advanced airport surveillance radar (ASR) which tracks aircraft up to
80 miles form the airport site. To make the problem “simple”, assume that all trafﬁc
operating at the airport is Large jet trafﬁc. Such aircraft require a minimum separation
between successive arrivals of 3 nm under IMC conditions and 2.5 nm under VMC
conditions. Assume the ATC probability of violation is 5% with standard deviation of the
in-trail delivery error at 12 seconds due to the installation of a PRM radar. The arrival
runway occupancy time is 60 seconds and the minimum departure-departure
separations are 75 and 60 seconds under IMC and VMC conditions, respectively. CEE 5614 Q2 Trani Page 1 of 3 Figure 1. Runway conﬁguration.
a) Find the saturation arrival capacity of the airport under VMC conditions.
b) Find the saturation departure capacity of the airport under VMC conditions.
c) Draw the VMC Pareto diagram for the airport under VMC conditions.
d) Estimate the in-trail separations required at VOR1 and VOR2 to match the saturation
capacity of the runway under VMC conditions. State the desired aircraft separations at
VOR1 and VOR2 in nautical miles and also estimate the headways in seconds (i.e.,
times between successive arrival). Assume the trafﬁc per hour using the blue and red
routes in one hour is split 55/45%.
e) If the trafﬁc is heterogenous and made up of turboprop and jet trafﬁc, how would you
approach the problem (do not solve). Clearly state your approach. Use ﬂowchart,
diagrams, etc. as needed.
f) How would an airport like this one beneﬁt using proposed NextGen technologies?
State what model parameters that are likely to change under NextGen and also state
the NextGen technologies that responsible for parameter changes. CEE 5614 Q2 Trani Page 2 of 3 Figure 2. Radar velocity proﬁles. Speed shown is true airspeed. Figure 3. Nominal and observed descent proﬁles. CEE 5614 Q2 Trani Page 3 of 3 ...
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This note was uploaded on 12/31/2011 for the course CEE 5614 taught by Professor Staff during the Fall '10 term at Virginia Tech.
- Fall '10