UWE-4
amateur radio satellite, NORAD 43880
Not heard todayUWE-4 frequencies
| Uplink | Downlink | Beacon | Mode |
|---|---|---|---|
| — | 435.600 MHz | — | FSK 9k6 |
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 UWE-4
UWE-4 is the fourth satellite in the University of Würzburg Experimental series of 1U CubeSats, launched on 27 December 2018 on a Soyuz-2.1a/Fregat rocket from Vostochny. Its mission was to demonstrate electric propulsion for attitude and orbit control in a 1U CubeSat, using NanoFEEP field-emission thrusters developed by TU Dresden to control the satellite's attitude and orbit.
The UWE series started in 2005 with UWE-1, which tested internet protocols in space; UWE-3 followed in 2013 with a new attitude-control system. The same university later built SONATE and SONATE-2.
UWE-4 transmits 9600 baud AX.25 FSK telemetry on 70 cm, with 437.375 MHz coordinated for both uplink and downlink. In its frequency application the team planned to open an onboard digipeater to all radio amateurs after the science mission. By October 2026 its orbit had dropped to about 405 km (CelesTrak).
Status
Listed as working, but nobody reported hearing UWE-4 on AMSAT in the last 30 days.
From reports filed on AMSAT, last 30 days.
Orbit
| Type | Low Earth orbit |
|---|---|
| Altitude | 397–405 km |
| Inclination | 97.6° |
| Period | 92.6 min |
| TLE epoch | 2026-10-28 08:52 UTC |
Orbital elements: CelesTrak, checked every 3 hours.
Questions about UWE-4
- What is the UWE-4 downlink frequency?
- UWE-4 transmits on 435.600 MHz (FSK 9k6).
- Is UWE-4 active?
- Listed as working, but nobody reported hearing UWE-4 on AMSAT in the last 30 days.
- When does UWE-4 pass over my location?
- Open UWE-4 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.