Only the current version so far — new entries appear as the app ships updates.
SCPC-FM voice S/N ratio is a productivity app by Randle Christian Sink with 500+ downloads (about 565 estimated). Released Dec 23, 2014. Install growth, rank history, SDKs and ad networks.
From the store listing: “Find the S/N ratio for a SCPC-FM satellite link by adding RF frequencies & C/N..”