What is the CO-65 downlink frequency?

CO-65 transmits on 437.475 MHz (AFSK 1k2).

When does CO-65 pass over my location?

Open CO-65 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.

CO-65 (CUTE-1.7+APD II): Frequencies, Status & Passes

Next passes over your station

Pass times depend on where you are. Track CO-65 on the live map to see its next passes over your station.

CO-65 frequencies

Uplink	Downlink	Beacon	Mode
—	—	437.275 MHz	CW 19 bd
—	437.475 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.

About CO-65

CO-65 (CubeSat-OSCAR 65), launched as Cute-1.7+APD II, is a small satellite of the Laboratory for Space Systems at the Tokyo Institute of Technology, the team that also built CO-55 (CUTE-1). It was launched on 28 April 2008 on an Indian PSLV rocket from Sriharikota, in the same cluster as CO-66 (SEEDS II), Delfi-C3 and the Canadian CanX-2. Its payloads included an avalanche photodiode (APD) sensor and a camera.

For radio amateurs CO-65 was unusual: from October 2008 it offered a 9600 bps GMSK digipeater with an uplink in the 23 cm band, on 1267.600 MHz, and a downlink on 437.475 MHz, using the path JQ1YTC. Operators sent APRS-style position packets and messages through it. On 23 cm the Doppler shift is large, so stations had to correct their uplink frequency during the pass.

Status

Listed as working, but nobody reported hearing CO-65 on AMSAT in the last 30 days.

From reports filed on AMSAT, last 30 days.

Orbit

Type	Low Earth orbit
Altitude	530–540 km
Inclination	97.8°
Period	95.3 min
TLE epoch	2026-10-28 13:52 UTC

Orbital elements: CelesTrak, checked every 3 hours.

Questions about CO-65

What is the CO-65 downlink frequency?: CO-65 transmits on 437.475 MHz (AFSK 1k2).
What is the CO-65 beacon frequency?: The beacon is on 437.275 MHz.
Is CO-65 active?: Listed as working, but nobody reported hearing CO-65 on AMSAT in the last 30 days.
When does CO-65 pass over my location?: Open CO-65 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.

CO-65