Studies of CDA
Continuous descent approaches (CDAs) have noise and emission benefits in low traffic environments based upon the study at the Louisville airport.
The noise and emission benefits derived for the nighttime arrivals at the Louisville airport are well documented scientifically, however, the implementation of full-time continuous descent approaches at Los Angeles International Airport were done with altitudes that were exactly opposite as to what was done at Louisville. CDA's utilized in high traffic environments must be kept at levels lower than conventional step-down approaches, otherwise, the jets will catch up with one another. This negates the noise and emission benefits.
Studies at a number of airports began in approximately 1999, and continued through 2004-2006. It appears that procedures were adopted by some airports such as London Heathrow around 2003-2004. NASA continued to conduct studies into the EDA technique through 2010.
Read more about this topic: Continuous Descent Approach
Famous quotes containing the words studies of and/or studies:
“His life itself passes deeper in nature than the studies of the naturalist penetrate; himself a subject for the naturalist. The latter raises the moss and bark gently with his knife in search of insects; the former lays open logs to their core with his axe, and moss and bark fly far and wide. He gets his living by barking trees. Such a man has some right to fish, and I love to see nature carried out in him.”
—Henry David Thoreau (1817–1862)
“Even the poor student studies and is taught only political economy, while that economy of living which is synonymous with philosophy is not even sincerely professed in our colleges. The consequence is, that while he is reading Adam Smith, Ricardo, and Say, he runs his father in debt irretrievably.”
—Henry David Thoreau (1817–1862)