D-Star ONE (DP1GOS) halfduplex repeater & beacon frequencies:
Uplink: 437,325MHz / Downlink: 435,525MHz RF-Power: 800mW
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.
D-Star ONE is the first private german CubeSat and the first D-Star communication spacecraft wordwide.
D-Star ONE will be launched on November 28, 2017 from Vostochny launch site jointly with the Meteor-M №2-1 mission of the Russian State Space Corporation ROSCOSMOS.
Final launch preparations are currently being performed.
The D-Star ONE spacecraft have been delivered on the Vostochny launch side.
See More: http://www.amateurlogic.com Read more
SpecificationFeaturesAccessories S15 Rugged Outdoor phone Specification Basic Parameter Model Rangerfone S15 Color Black Design Bar OS Android... Read more
The ARRL Repeater Directory ® — introduced this week for 2015-2016 — has a newly launched companion app for Apple® iOS® devices. iPhone®, iPad®... Read more
I start building an SWR / Relative Power Bridge. This is a simple circuit. I show you how to wind the toroid coils. The circuit is based on Don Cantre... Read more
Mix and match any four HF/VHF/UHF bands. Example: screw in 80,40,20 meter hamsticks and a dual band 2M/440 MHz whip (two on each band) on opposite sid... Read more
4SQ-8DIR antenna system The four-square phased-vertical array if used by many contesters and DXers for oreration on the low bands. This construction m... Read more
Comet GP-15 Tri-Band VHF/UHF Base Vertical Antennas provide good gain figures on the 6-meter, 2-meter, and 70-centimeter bands in a compact 7.9 foot p... Read more
RQ-84 – The classic “Quad” full-size has ten elements for 10m, eight – 15 m, six – 20 m, and four full-size elements on 40m band
RQ-84 – the classic “Quad” full-size has ten elements for 10m, eight – 15 m, six – 20 m, and four full-size elements on... Read more