communication & amateur radio satellite

The launch of D-STAR ONE Sparrow is sheduled for 27.12.2018

D-Star ONE Sparrow (DP1GOS) halfduplex repeater & beacon frequencies:

Uplink: 437,325MHz / Downlink: 435,525MHz RF-Power: 800-1200mW

D-Star One is a 3U CubeSat which is equipped with four identical radio modules with D-Star capabilities, all being operated in a half-duplex mode.

Two modules are used for telemetry and telecomand and operate on identical frequencies. Telemetry can be received on 435,7 MHz, the format will be disclosed after launch. Both modules receive, and both modules answer. To prevent information loss, they answer after each other. So each telemetry frame is repeated twice. Both modules have a D-Star Voice-Message Beacon, but it is only activated for one module during LEOP. The Beacon is repeated once in a minute.

The other two modules are dedicated to the radio amateur community. Both modules have the same frequencies, so one of them will be powered down as long as the other one shows no degradation effects. The downlink frequency is 435.525 MHz and the uplink frequency is 437.325 MHz. Also here half-duplex mode is applied. The modules are configured to work as D-Star repeaters, so they retranslate the received d-star frames on the downlink frequency. They also have a D-Star voice beacon signal.

All modules are operated in a power save mode. This means that they are in idle for 40 seconds and then in receive mode for 20 seconds. Once a signal has been received, the modules switch to receive mode for five minutes. So it might be necessary to „ping“ the satellite a couple of times until an answer is received.

Welcome to the official
D-STAR ONE project website

D-Star ONE is the first private german CubeSat and the first D-Star communication spacecraft wordwide.

The D-Star ONE Sparrow is ready for launch

Launch vehicle: Soyuz-Fregat

Launch date: 27.12.2018

Our teams were actively working together during the year, and we are happy to announce that today we have completed the assembly and final checks of the D-Star ONE (Sparrow) satellite.

The D-Star ONE project is highly important for the whole GOS and iSky teams. We also express our deep gratitude to our main launch provider, ECM Space Technologies GmbH. The Soyuz-2/Fregat launch system will launch from the Vostochny launch site on December 27, 2018 and bring the D-Star ONE (Sparrow) in the space!

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Orbit parameters and TLE:

The target orbit for the D-Star ONE spacecraft is a circular sun synchronous orbit with an altitude of approx. 585km

The launch opportunity for D-Star ONE (Sparrow) spacecraft is scheduled for 27.December 2018.

Preliminary TLE:

1 00000U 18001C 18361.19692361 .00000000 00000-0 00000-0 0 00010

2 00000 097.6241 266.3107 0018955 114.7306 159.8907 15.00040100000017

This website is under development. Please check back soon for more content!

Please use this e-Mail for requests: info@d-star.one

Our D-Star ONE team is happy to support you.