DP0GVN ist wieder über QO-100 QRV....
Posts by DB2OS
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The State Secretariat of Spain for Telecommunications and Digital Infrastructures has granted authorisation until 26 December 2022 to holders of amateur radio authorisations to carry out amateur service broadcasts in the 2410 MHz frequency band from 2.400,050 to 2.410 MHz, with a maximum e.i.r.p. of 1500 watts and using directional antennas with a gain of not less than 21.5 dBi, from authorised amateur radio stations located anywhere in the national territory to the QO-100 satellite located at orbital position 25.9°E of the geostationary orbit.
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The State Secretariat of Spain for Telecommunications and Digital Infrastructures has granted authorisation until 26 December 2022 to holders of amateur radio authorisations to carry out amateur service broadcasts in the 2410 MHz frequency band from 2.400,050 to 2.410 MHz, with a maximum e.i.r.p. of 1500 watts and using directional antennas with a gain of not less than 21.5 dBi, from authorised amateur radio stations located anywhere in the national territory to the QO-100 satellite located at orbital position 25.9°E of the geostationary orbit.
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Da ist sie....
unsere neue QO-100 Ersatzantenne für DP0GVN ist auf der Neumayer-Station III in der Antarktis angekommen und inzwischen auf dem Dach der Station montiert!
weitere Infos: https://amsat-dl.org/neue-qo-1…litenantenne-fuer-dp0gvn/
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interestingly, the users manual is also mentioning an X-Band transceiver.
If some information from Alan, CAMSAT becomes available, I will post it here..
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Congratulations to CAMSAT!
XW-3 (CAS-9) has been successfully launched this morning, both CW and GMSK beacons has been received.
CW beacon was heard in Bochum/DK0SB at first ver low Elevation pass over DL.
https://network.satnogs.org/observations/5199825/
worlwide:
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Hello OM,
The CAMSAT XW-3 (CAS-9) amateur radio satellite will be launched at UTC 03:11:31 on 2021-12-26 , and will be deployed at 98.858° east longitude and 28.413° north latitude at UTC 03:35:58, location close to Western Australia.
Radio amateurs will receive CW beacon and GMSK telemetry signals approximately 38 seconds after the satellite is separated from the launch vehicle, and then the linear transponder will be put into use after approximately 49 seconds.
Preliminary TLE:
XW-3(CAS-9)
1 99999U 21360.14997609 .00000032 00000-0 10363-4 0 00007
2 99999 098.5836 072.3686 0004232 307.2415 261.3002 14.38559758000156
IARU coordination: http://www.amsatuk.me.uk/iaru/…_detail.php?serialnum=804
Attached is the launch schedule.
73!
Alan Kung, BA1DU
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und hier der erfolgreiche Schulkontakt aufgezeichnet mit unser SatNOGS Station in Bochum:
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ARISS-Kontakt für Schüler der Beruflichen Schule Direktorat 1 Nürnberg, Nürnberg, Deutschland, geplant
18. Dezember 2021 - Amateurfunk auf der Internationalen Raumstation (ARISS) hat eine Terminbestätigung für einen ARISS-Funkkontakt mit Astronauten erhalten. ARISS ist die Gruppe, die spezielle Amateurfunk-Kontakte zwischen Studenten auf der ganzen Welt und Besatzungsmitgliedern mit Amateurfunk-Lizenzen auf der Internationalen Raumstation (ISS) herstellt.
Dabei handelt es sich um einen Telebrückenkontakt über Amateurfunk mit Studenten in Nürnberg, die abwechselnd ihre Fragen an Matthias Maurer, Amateurfunkrufzeichen KI5KFH, stellen werden. Die lokalen Covid-19-Protokolle werden bei jedem ARISS-Kontakt eingehalten. Die Downlink-Frequenz für diesen Kontakt ist 145.800 MHZ und kann von Zuhörern innerhalb des ISS-Footprints, der auch die Telebridge-Station umfasst, gehört werden.
ARISS-Teammitglied Jan Poppeliers in Aartselaar, Belgien, mit dem Rufzeichen ON4ISS, wird als ARISS-Relais-Amateurfunkstation fungieren.
Der ARISS-Funkkontakt ist für den 21. Dezember 2021 um 9:24 Uhr MEZ (Nürnberg, DE), (8:24 Uhr UTC, 3:24 Uhr EST, 2:24 Uhr CST, 1:24 Uhr MST und 12:24 Uhr PST) geplant.
Die Berufliche Schule Direktorat 1 Nürnberg (ca. 2.500 Schüler) ist eine Berufsschule im Süden Deutschlands. Zu den Unterrichtsfächern gehören Elektrotechnik, Elektronik, Informationstechnik und Mechanik/Mechatronik. Der Unterricht ist eine Kombination aus theoretischem Unterricht und praktischer Ausbildung in Werkstätten und Industrieanlagen. Zu den Schüleraktivitäten gehören Amateurfunk, bei dem die Schüler Amateurfunkgeräte bedienen können, und Elektronik, wozu auch der Bau von Leiterplatten gehört.
Media Contact:
Dave Jordan, AA4KN
ARISS PR
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Hello OM,
CAMSAT XW-3(CAS-9) satellite has been installed on the CZ-4C Y39 launch vehicle at the Taiyuan Satellite Launch Center in China, and related work is in progress as planned.
If all goes well, the satellite will be launched on December 25, 2021,it is piggybacked on the rocket with governmental primary payload ZY-1(02E) earth resources satellite. The orbit will be a circular sun-synchronous orbit with an altitude of 770.1 kilometers and an inclination of 98.58 degrees, the running cycle is 100.14 minutes.
Attached is the user's manual of XW-3 (CAS-9) satellite for radio amateur, precise TLE will be available later.
73!
Alan Kung, BA1DUCAMSAT
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ARISS-Kontakt mit Schülern und Studenten des Technisches Bildungszentrum Mitte (DN3HB) in Bremen und Carl-Prueter-Oberschule (DN6OE) in Sulingen.
Der ARISS-Funkkontakt ist für den 16. Dezember 2021 um 11:45 Uhr MEZ (Deutschland), 10:45 Uhr UTC, 5:45 Uhr EST, 4:45 Uhr CST, 3:45 Uhr MST und 2:45 Uhr PST) geplant.
Matthias Maurer wird sein Rufzeichen KI5KFH verwenden.
Von jeder Schule sind getrennte Live-Streams geplant.
Aus Bremen: Technisches Bildungszentrum Mitte - Bremen DN3HB: https://funkfreun.de/tbz und
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nachzuhören auch hier:
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The Beacons are actually the Satellite-to-User Downlink traffic in 250 MHz channels (see chart in my first post) at 11.075, 11.325 and 11.575 GHz. Other channels might not be in use yet.
Christian Hahn in California made some cool observations and analysis:
The central 1 MHz of each 250 MHz channel is occupied by ~9 tones spaced at 43.9495 kHz. 1 tone on the channel center, 4 tones on each sideband.
Christian found out that the central 9 tones sometimes are missing.
There is still some guess that the tones in the middle are low speed data carrying the satellite id number and orbital elements of nearby or all active satellites for tracking...
73s Peter
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Actually it's a surprise that we even do see something from Starlink with the QO-100 dish pointing to 25.5°E.
To avoid interference between geostationary (GSO) and non-geostationary (NGSO) satellite systems, FCC and national regulations require that the user beams are switched away to an alternative satellite when the user terminal is pointing to the geostationary belt and GSO downlinks...
Maybe we are seeing are actually the side lobes or something else. On the other hand, these signals are probably some telemetry beacon downlinks used for initial tracking when searching and aligning the Dishy terminal for the first. They might carry some sort of satellite elements. Remember that Dishy does not have any internet connection and does not know where it is located and where to point in the sky to establish first contact and align itself..
Anyway.. fascinating technology behind this and fun to play with..
Next thing would be to use a bare LNB pointing straight up..
73s Peter
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You only need to wait a few minutes and you will see something like this, as seen on my QO-100 dish (SDR console tuned to 11.325 GHz):
Also keep in mind that we are only seeing a side lobe as usually the main lobe is more or less directed perpendicular to the user station on the ground. So if you just mount your LNB without reflector looking vertically up, you might even see more...
73s Peter
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Hi,
the famous SpaceX/Starlink satellites have downlinks in the Ku-Band as shown in this band allocation below.
This is indeed the same band used for Direct-TV geostationary satellites and also QO-100 (there are also downlinks in the Ka-Band for the Gateway-Links, but this is not the scope here).
OH MY GOD - ITS FULL OF STARS
here you can find some Starlink Coverage Tracker:
Same minds, same thoughts...
So, why not using a simple LNB as we use for QO-100 and try to receive Starlink satellites instead. Just point the LNB in the Sky and use an SDR to check if you can see something in the waterfall spectrum with your favorite SDR software. Indeed you may see only part of the signal as it is high bandwidth, but there are also some telemetry beacons like on 11.325 GHz.
Starlink Downlinks are usually circular polarized (RHCP/LHCP), so your LNB's linear polarization (H/V) does not matter!
Some people (including I8LYL former I0LYL) have just used their QO-100 installation and waited until a Starlink satellite just (quickly) passed through the antenna beam...
Here is a pretty nice article from Derek OK9SGC with full explanation and further links:
https://sgcderek.github.io/posts/starlink-beacons/
Have fun!
73s Peter DB2OS