ARLA/CLUSTER: Sistema Orbital Alemão lança D-STAR ONE para a recepção da telemetria

[João Costa > CT1FBF]

D-STAR ONE launched, telemetry received

German Orbital Systems reports a successful telemetry downlink has been
received.

Their web page http://www.d-star.one/ reports D-Star ONE Sparrow and D-Star
ONE iSat were successfully launched on December 27 as part of an ECM
smallsat cluster on the Soyuz-2/Fregat from Russia's Vostochny launch site.
Additional details can be found at:
http://tinyurl.com/ANS-006-DSTAR-ONE

During the first orbits, beacons were received in the US, Germany, Czech
Republic and Belarus, confirming the successful separations of the
satellites on their target orbit 585 km, 97.73 deg, SSO.

D-Star ONE Sparrow and D-Star ONE iSat are a pair of 3U cubesats which are
equipped with four identical radio modules with D-Star capabilities, all
being operated in a half-duplex mode. At press time DSTAR One Sparrow was
planned to be used for amateur radio.

DK3WN received the first telemetry on December 29, 2018 with more signals
received by Scott, K4KDR and Vladimir, EU1SAT.

Check the German Orbital Systems web page for LEOP status and satellite
availability for contacts.

D-Star ONE Sparrow operates as a half duplex repeater:
Callsign: DP1GOS
Uplink: 437.325 MHz
Downlink: 435.525 MHz RF-Power: 800-1200 mW
Telemetry: 435.700 MHz 4k8 GMSK Mobitex (CMX990 Mobitex Format)

The telemetry format is documented at:
http://tinyurl.com/ANS-006-DSTAR-ONE-Telemetry
A telemetry decoder is available at:
http://www.dk3wn.info/p/?page_id=29535

Technical details for radio amateurs is posted at:
http://tinyurl.com/ANS-006-DSTAR-ONE-Amateur

A D-Star voice message beacon transmits once a minute. 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. Object #43879 continues to be a likely
fit for tracking at present.

German Orbital Systems, ANS
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