NEW YORK (Standard&Poor's) Sept. 14, 2015--Standard&Poor's Ratings Services has raised its rating on the Greater Orlando Aviation Authority (GOAA), Fla.'s bonds to 'AA-' from 'A+'. At the same time, Standard&Poor's assigned its 'AA-' rating to the authority's series 2015A senior airport revenue bonds. The outlook is stable. The GOAA is issuing the debt for Orlando International Airport (MCO). "The upgrade reflects our view of improved debt service coverage, which we expect MCO to maintain over the next five years," said Standard&Poor's credit analyst Peter Murphy. Proceeds from the 2015A bonds will fund various capital improvements, and repay short term borrowings. The GOAA operates the airport system, which is composed of MCO and