What is the basis for a finding of probable cause in a search warrant application?

Appellant argues that the magistrate erred by finding probable cause for the search warrant because the supporting affidavit was conclusory. Appellant also contends that the reliability of the informant was not sufficiently established. Finally, appellant argues that the good faith exception to the exclusionary rule, established in United States v. Leon (1984) 468 U.S. 897, cannot apply because any indicia of probable cause in the affidavit was too ephemeral to be reasonably relied upon.