Rafael Fraga

Mercado Doméstico de Carga Aérea: Análise Descritiva e Econométrica do Setor

Resumo Este artigo apresenta uma analise econometrica simplificada do setor domestico de carga aerea brasileiro entre os anos de 1997 e 2001, iniciando com uma breve caracterizacao atual do setor, onde e possivel compreender como tal nicho comportou-se apos o periodo analisado. Desta forma, ao conectar tais informacoes, o texto possibilita ao leitor realizar inferencias sobre possiveis motivos que levaram a origem de tal realidade existente. Possibilita, assim, idealizar possiveis rumos do segmento no futuro. Abstract This paper presents an econometric analysis about the Brazilian domestic air cargo market from 1997 to 2001, starting by a short description of the current sector in order provide the sector features afterward the analyzed period. Thus, through connecting such information, the text can allows the reader to make inferences about potential reasons for such current marketing features, and also allowing some predictive interpretation about the future of the sector.

ANALYSIS OF CRITERIA FOR CLOSELY-SPACED PARALLEL RUNWAY APPROACHES: INFLUENCES AND CAPACITY CONSTRAINTS IN A MULTIPLE AIRPORT SYSTEM

In order to increase arrival rates at many of todays heavily congested airports, simultaneous approaches, whenever possible, are conducted on parallel runways. For many years, the FAA has permitted simultaneous independent instrument approach operations only on parallel runways with a minimum separation of 4300 ft. Nowadays, new procedures have been developed to increase the utilization on closely-spaced runways, PRM/SOIA (Precision Runway Monitor/Simultaneous Offset Instrument Approach), one of the most recent of such procedures, allows simultaneous approaches in systems of runways spaced as close as 750 ft. Fraga et al. (2010) [6] using computer simulation showed the potential application of PRM/SOIA at Sao Paulo/Guarulhos International Airport (GRU) evaluating its impact on the airport runway hourly capacity. The present paper considering GRU as part of the airport system of TMA-SP (Sa˜o Paulo Terminal Airspace) focuses on the influence of PRM/SOIA implementation at GRU on the system of main airports in the terminal airspace. Evidences were found that TMA-SP current overlapping approach procedures generate interferences on the operations of the airports in the system reducing the overall runway hourly capacity of the airports. In order to quantify this interference simulation was used to evaluate and to compare the airport system runway hourly capacity as opposed to the individual airport runway hourly capacity added up. It was found that TMA-SP airport system runway hourly capacity is about 30% less than the estimated overall runway hourly capacity of the airports alone.