What is the RS39S downlink frequency?

RS39S transmits on 435.815 MHz (AFSK 1k2), 435.860 MHz (FSK 9k6), 435.915 MHz (DOKA 9k6), 435.000 MHz (DOKA 9k6) and 435.650 MHz (AFSK 1k2).

When does RS39S pass over my location?

Open RS39S on the live map and enter your Maidenhead locator or use GPS: the tracker lists the passes of the next 24 hours with AOS, maximum elevation and LOS, and shifts the frequencies for Doppler.

RS39S

MONITOR-2 · amateur radio satellite, NORAD 57184

Not heard today

Modes Digi Orbit LEO, 95 min

Track RS39S on the live map Find it in the sky

Next passes over your station

Pass times depend on where you are. Track RS39S on the live map to see its next passes over your station.

RS39S frequencies

Uplink	Downlink	Beacon	Mode
—	435.815 MHz	—	AFSK 1k2
—	435.860 MHz	—	FSK 9k6
—	435.915 MHz	—	DOKA 9k6
—	435.000 MHz	—	DOKA 9k6
—	435.650 MHz	—	AFSK 1k2

Nominal frequencies, without Doppler. The live map shifts them for your station during a pass. Frequencies: SatNOGS DB (modified: working amateur transmitters only, in MHz), CC BY-SA 4.0.

Status

Listed as working, but nobody reported hearing RS39S on AMSAT in the last 30 days.

From reports filed on AMSAT, last 30 days.

Orbit

Type	Low Earth orbit
Altitude	498–514 km
Inclination	97.5°
Period	94.7 min
TLE epoch	2026-10-28 14:31 UTC

Orbital elements: CelesTrak, checked every 3 hours.

Questions about RS39S

What is the RS39S downlink frequency?: RS39S transmits on 435.815 MHz (AFSK 1k2), 435.860 MHz (FSK 9k6), 435.915 MHz (DOKA 9k6), 435.000 MHz (DOKA 9k6) and 435.650 MHz (AFSK 1k2).
Is RS39S active?: Listed as working, but nobody reported hearing RS39S on AMSAT in the last 30 days.
When does RS39S pass over my location?: Open RS39S on the live map and enter your Maidenhead locator or use GPS: the tracker lists the passes of the next 24 hours with AOS, maximum elevation and LOS, and shifts the frequencies for Doppler.