| KSDA-FM (Joy FM) | |
| Airdate: | June 3, 1991 (as Joy 92) mid-2008 (as Joy FM) |
| Frequency: | 91.9 MHz |
| City: | Agat, Guam |
| Area: | Guam |
| Format: | Religious |
| Owner: | Good News Broadcasting Corporation |
| Erp: | 3,800 watts |
| Haat: | 305 meters |
| Branding: | "Joy FM" |
| Class: | C2 |
| Callsign Meaning: | Seventh-day Adventist Church |
KSDA-FM (91.9 FM) is the call sign for the radio station JOY FM broadcast at 91.9 FM from Agana Heights, in the United States territory of Guam.
KSDA began as "Adventist World Radio-Asia" (AWR-Asia) in 1987 and continues to broadcast on shortwave from Agat, Guam to various countries in Asia. In 1990, AWR launched a local FM station at 91.9 MHz. KSDA-FM first broadcast from AWR's Agat studio, and later from Agana Heights.
When AWR shifted its mission away from local broadcasting, KSDA-FM's operation was passed on to the church's Guam-Micronesia Mission in the early 1990s. In 2000, Good News Broadcasting Corporation (GNBC), a non-profit 501-c3 organization composed of members from various Adventist entities on Guam, received KSDA-FM's license from AWR.
The FM station was known as JOY 92 until mid-2008, when GNBC secured a construction permit for a transmitter on Saipan. The Saipan transmitter KORU rebroadcasts the Guam station on 89.9 MHz,[1] necessitating the name change.