26°E first Ham geostationary transponder SSB and DATV

Projekte rund um den Amateurfunk
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26°E first Ham geostationary transponder SSB and DATV

Beitrag von oe7dbh » 01.07.2015, 01:22

16 NOVEMBER 2018
Es’hail-2 successfully launched from Kennedy Space Center
Es’hailSat, the Qatar Satellite Company, announced today the successful launch of Es’hail-2 satellite on board a Falcon 9 rocket from Launch Complex 39A at Kennedy Space Center in Florida, USA. Lift-off of the Falcon 9 rocket carrying the Es’hail-2 satellite took place at 23:46 Doha time. Es’hail-2 satellite separated from the second stage of the Falcon 9 rocket at 00:18 Doha time on 16 November and the solar panels were fully deployed about 2 hours after liftoff. The spacecraft is currently in its transfer orbit, and Es’hailSat expects to bring the satellite in to commercial service at 26°E orbital position by January 2019, upon completion of in Orbit Tests.
Source: https://www.eshailsat.qa/en/news/read_more/195/2018

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Re: 26°E erster geostationärer Satellit

Beitrag von oe7dbh » 11.07.2015, 18:19

My TX Equipment for the first tests on future geostationary satellite...
Testequipment for 26East.jpg
...auch Empfangsmässig bin ich bereit, es gibt derzeit drei Fernsehesatelliten auf diese position... aber nur
ein kleine teil von allen transponder strahlen auch Europäische raum ( BADR-4 ) , immerhin ausreichend um Antenne zu
RX Antenne x.jpg
26grad spot.png
...derzeit befindliche komerzielle satelit auf fast gleiche geo position
und etwas grösseren Spiegel......
vor dem einbau.jpg
In Spiegel eingebaut.jpg
Eingebaut.... Messergebniße !!

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Beitrag von oe7dbh » 05.03.2016, 18:02

Hardware Configuration2.jpg
LNB.... contact: oe7dbh@tirol.com
Hardware Configuration1.jpg
Contact: oe7dbh@tirol.com
DSCN9503SSB receiving.jpg
DSCN9503dvbs receiving.jpg
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Re: 26°E erster geostationärer Satellit

Beitrag von PA3FYM » 24.06.2018, 10:06

Below my interpretation of an Es'hail-2 transverter (Mk II).
It consists of readily available 'Ebay development boards',
junkbox and flea market parts.

RX / TX LO: ADF4351
TX-mixer: HMC213
739.5 MHz mixer: ADE-1 + J310
MDS @739.5 MHz: -136 dBm (through loudspeaker)
HPA: small UMTS-module, output (P-1 dB) 10W
TX / RX IF: 432 MHz (could be something else)

The transverter/BUC (Block Up Converter) is a seperate box.
Power, IF and PTT are fed through one coax cable.

Remco PA3FYM
PA3FYM Es'hail-2 transverter MkII

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Re: 26°E erster geostationärer Satellit

Beitrag von PE1CMO » 10.07.2018, 20:35

Also in Holland there is interest in the upcoming Es'hail-2 satellite.

On June 26th Remco PA3FYM gave a lecture about his philosophy and (working!)
interpretation of an Es'hail-2 transverter for narrow band / weak signal usage
in The Netherlands. He suggested the use of one GPS disciplined reference
for the whole 'frequency factory' inside such a transverter, e.g. 25 or 27 MHz.
For weak signal work emphasis on phase noise is inevitable and he suggested
a crystal filter for the GPS disciplined reference.

Inspired, my initial idea was to modify a (commercial) LNB, based in the aforementioned philosophy.

For good amateur reception the ideal 10.5 GHz LNB has:

1: no receiving noise (NF)
2: no phase noise (PN)
3: excellent stability (0 Hz)
4: to be low cost

Of course it is impossible to achieve the aforementioned criterions.
Inspired by the experiments of Drako here I used an Octagon Oslo LNB Optima
with PLL and decided to improve the standard performance of this LNB.

Although these Octagon LNB's are a good 'bang for the buck' there is much room for improvement
concerning phase noise and stability.

First thing I did was feeding the LNB PLL with an external low (phase) noise (27 MHz) oscillator.

My eye fell on a low phase noise oscillator (VCXO) from Abracom. This oscillator is (still)
free running, and its 27 MHz output signal is (as an experiment) filtered with one 27 MHz crystal
to improve significantly phase noise. Although my reference VCXO oscillator was free running it
was stable enough to perform phase noise measurements.

Last Tuesday Mischa PA1OKZ brought a FSW-26 spectrum analyzer to the local PI4RCG radioclub to measure
my experimental setup. Below a screenshot of the measurements @9750 MHz is depicted.

The first 9750 MHz results @1 kHz distance are -75 to -76 dBc/Hz, and around -84 - -85 dBc @10 kHz.
I was happy with the performance! My idea is to lock the 27 (or 25) MHz VCXO oscillator with a PLL using a
reference of 30.72 MHz, delivered by my Ublox LEA-M8F.

During the initial measurements the LNB was connected to a normal (linear/regulated) 12V supply,
so power supply noise filtering may gain some dB’s of phase noise.
Also more filtering of the 27MHz VCXO (GPS-disciplined) output (more crystals!) may help.

In the next weeks I try to make a PCB board for the complete receiving converter.
(including low noise power supply, PLL for 27 (or 25) MHz, a 739.5 MHz bandpassfilter and mixer down to 432 MHz,
with the 2th LO (307.5 MHz) also locked to the 30.72 MHz LEA-M8F reference)

73, Rene PE1CMO

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Re: 26°E erster geostationärer Satellit

Beitrag von PE1CMO » 21.07.2018, 16:19

I try to publish photo's here, but the foto's give an error.

At the Dutch radio amateur forum I publish my idea's and experimental PCB board.


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Re: 26°E first Ham geostationary transponder SSB and DATV

Beitrag von oe7dbh » 26.07.2018, 12:17

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 2018 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

16 NOVEMBER 2018
Es’hail-2 successfully launched from Kennedy Space Center
Es’hailSat, the Qatar Satellite Company, announced today the successful launch of Es’hail-2 satellite on board a Falcon 9 rocket from Launch Complex 39A at Kennedy Space Center in Florida, USA. Lift-off of the Falcon 9 rocket carrying the Es’hail-2 satellite took place at 23:46 Doha time. Es’hail-2 satellite separated from the second stage of the Falcon 9 rocket at 00:18 Doha time on 16 November and the solar panels were fully deployed about 2 hours after liftoff. The spacecraft is currently in its transfer orbit, and Es’hailSat expects to bring the satellite in to commercial service at 26°E orbital position by January 2019, upon completion of in Orbit Tests.

AMSAT-P4A Bandplan recommendation......
AMSAT P4a.jpg
Prinzip SSB.jpg
DSCN0862  UPconverter.jpg
Order: calvin@hides.com.tw INFO: oe7dbh@tirol.com
DSCN0848  LNB.jpg
Erhältlich bei oe7dbh@tirol.com
Available at oe7dbh@tirol.com

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 2016 - 2017 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

EsHailSat2 2017.jpg
Hier können Sie ausrechnen Elevation und Azimuth von ihren Standort

From http://www.aerospace-technology.com .......
Es'hail-2 is a new communication satellite scheduled to be placed into the geostationary transfer orbit in the fourth quarter of 2016. It will be launched aboard the Falcon-9 launch vehicle from Cape Canaveral Air Force Station, Florida, US.
The satellite will be positioned at 26° east orbital position and will provide TV broadcasting and direct-to-home (DTH) services across the Middle East and North Africa. It will be the first Amateur Radio communication satellite in Qatar.
Es'hailSa, a company based in Qatar, is the owner and operator. Es'hail-2 will become Qatar's second communications satellite, following the launch of Es'hail-1 in August 2013.
Satellite development......
"Es'hail-2 has a mass of approximately 3,000kg."
Es'hailSat awarded the design and build contract of the satellite to Japan-based satellite manufacturer, Mitsubishi Electric (MELCO) in September 2014.
MELCO will also supply the ground systems and provide the required training under a complete turnkey solution. This makes Mitsubishi the first Japanese satellite supplier to enter Arab's commercial communications satellite market.
Es'hail-2 has a mass of approximately 3,000kg and will have a lifespan of more than 15 years.
Communication capabilities......
The satellite will feature 24 Ku-band and 11 Ka-band transponders to provide direct broadcasting services for television, government and commercial content distribution.
In addition, it will carry two phase four Amateur Radio transponders, which will provide Radio Amateur Satellite Corporation the first geostationary communication capability to directly link Brazil to India in a single hop in real-time. It will also allow the AMSAT community to corroborate and exhibit their digital video broadcasting standard.
Satellite bus......
Al Yah 3 Communication Satellite, Al Yah 3 is an all Ka-band communications satellite .
Es'hail-2 will be based on the DS2000 satellite bus platform developed by MELCO. The satellite bus handles a broad range of communications payloads and can provide an output of up to 15kW, which is sufficient to power multiple payloads.
Its flexible design suits various payload applications, including hybrid communication payloads, multiple spot-beam broadband communications and meteorological satellites.
The electrical power system includes 100V-regulated dual bus with silicon, multi-junction Gallium arsenide solar array and NiH2 or Li-Ion batteries.
Launch vehicle......
In December 2014, Es'hailSat selected Space Exploration Technologies to launch the satellite. SpaceX will launch the satellite aboard Falcon 9, its own launch vehicle, from SpaceX's launch complex 40 at Cape Canaveral Air Force Station.
Falcon 9 is a two-stage rocket weighing 505,846kg and standing 68.4m tall. It can carry a payload of 13,150kg to LEO and 4,850kg to GTO.
Its first stage features nine Merlin engines and aluminium-lithium alloy tanks carrying liquid oxygen and rocket-grade kerosene (RP-1). It generates 1.3Mlb (million pounds) of thrust at sea level and 1.5Mlb in the vacuum of space.
The second stage incorporates a single Merlin vacuum engine that delivers the payload to the respective orbit. The engine can be restarted multiple times to place different payloads into different orbits.
This stage generates a thrust of 180,000lbf and an intermediate stage between the first and the second holds the release and separation system.

Amsat20DL   coverage.jpg
AmsatEsHailSat data.jpg

From: http://www.ee.co.za/article/radio-amate ... lites.html 30.03.2016.
Radio amateurs have a long history in satellites: first it was medium sized satellites in low earth and Molniya orbits, but after the free launch opportunities as a secondary payload on a major launch dried up, the attention turned to CubeSats. As part of educational support programmes, NASA and other launch agencies provide free launches for CubeSats while Russia, India and China offer inexpensive launch opportunities.
The quest for a geostationary amateur radio satellites has always been there but free launches into a geostationary orbit have up to now not materialised. This will soon change. In the next few years radio amateurs will have access to two geostationary platforms, one that will service the Americas and another one, particular attractive to South Africans, that will be positioned at 26° East giving 24 hour access to Africa, Europe and the Middle East. These two geostationary projects will be included in commercial platforms similar to Amateur Radio Satellite (AMSAT) South Africa seeking to have an amateur radio transponder included in South Africa’s next satellite currently designated as EOS-1 (Earth Observation Satellite).
Following a proposal from the Qatar Amateur Radio Society, Es’Hailsat, the Qatar Satellite Company, announced that their new geostationary satellite, the Es’HailSat-2 communications spacecraft, will carry two transponders for use by radio amateurs.
Es’HailSat-2 will provide the first amateur radio geostationary communication capability linking Brazil and India with all areas in between. It will carry two AMSAT-DL-designed Phase 4 amateur radio transponders, consisting of one 250 kHz linear analogue transponder and an experimental digital modulation transponder with an 8 MHz bandwidth which is intended for digital experiments and DVB amateur television. The contract to build the two transponders was awarded to Mitsubishi Electric (Melco).
Uplinks will be in the 2.400-2.450 GHz range, and downlinks in the 10.450-10.500 GHz Amateur-Satellite Service allocations. Both transponders will be equipped with antennas capable of providing full coverage over about one-third of Earth’s surface. The Qatar Amateur Radio Society and Qatar Satellite Company are cooperating on the Amateur Radio project with AMSAT-DL (German Amateur Radio Satellite organisation) which is providing technical support.
On 28 December 2014 Es’HailSat-2 signed for a launch on Falcon 9, a two-stage rocket designed and manufactured by SpaceX. As the first rocket completely developed in the 21st century, Falcon 9 was designed from the ground up for maximum reliability and made history in 2012 when it delivered Dragon into the correct orbit for rendezvous with the International Space Station. Since then SpaceX has made a total of three flights to the space station, both delivering and returning cargo for NASA. Falcon 9, along with the Dragon spacecraft, was designed from the outset to deliver humans into space and under an agreement with NASA, SpaceX is actively working toward that goal.
Peter Gülzow, President of AMSAT DL providing technical support for the amateur radio payload on Es’Hailsat
“We have built and launched several successful amateur radio satellites and have pioneered new technologies that are today employed in commercial satellite projects,” Peter Gülzow, president of AMSAT DL said. One of the AMSAT DL developments is LEILA-2, a system that analyses the passband of the narrow band transponder and sends a marker tone on all stations that use too much uplink power. There will be two control stations, one in Doha with a back-up at AMSAT DL in Bochum, Germany.
“The idea that using frequencies in the 2 and 10 GHz bands will limit the number of amateurs who will use the transponders because of the perceived high cost of a ground station is ill-founded as many of the components required are readily available on the commercial markets at low cost,” Peter said. The launch is scheduled for December 2016
In the US another amateur radio geostationary project is also taking shape. Researchers at the Ted and Karyn Hume Centre for National Security and Technology are preparing to send an amateur radio transponder into a geosynchronous orbit in 2017. “Seven days a week, 24 hours a day, 365 days a year, a new ham band will be available for the Americas,” said Robert McGwier, research professor in the Bradly Department of Electrical and Computer Engineering and the Hume Centre’s director of research. “It will allow rapid deployment to disaster areas and support long-haul communications for first responders.”
A geosynchronous orbit has the same period as the Earth’s rotation — just under 24 hours. A satellite in such an orbit is easy to locate and access. In this case, the satellite will always be within a band of longitudes over the Americas, continually accessible to radio amateurs, and students and researchers at the Virginia Tech Ground Station.
The satellite itself will be operated by Millennium Space Systems on behalf of the United States Air Force. The Radio Amateur Satellite Corporation (AMSAT) will operate the radio, which will be designed and built by Virginia Tech students — making this project a unique collaboration among the university, non-profit organisations, private companies, and the USA Federal Government.
One of the additional benefits of these two geostationary satellite projects is that new equipment will be developed that is relatively easy to replicate and will not burn a hole in the pockets of radio amateurs. This is perhaps a challenge to the amateur radio fraternity to remain innovative and development focused.

Katarischer Kommunikationssatellit startet mit AMSAT-DL-Transpondern
Die Zusammenarbeit zwischen der katarischen Amateurfunkvereinigung QARS, der Qatar Satellite Company und der AMSAT-DL trägt Früchte: 2016 sollen Amateurfunknutzlasten an Bord des katarischen Satelliten Es'HailSat-2 ins All fliegen. Das Projekt kann die Tür für weitere Starts auf geostationären Satelliten öffnen. Die beiden Transponder auf dem geostationären Es'hail-2-Satelliten könnten Funkamateure von Brasilien über Europa bis nach Indien verbinden. Kleiner Wermutstropfen: Der Norden Amerikas wird nicht abgedeckt. Der Satellit soll Ende 2016 startbereit sein und auf 25,5 Grad Ost positioniert werden. Mit diesem Projekt wäre Phase 4, die vorletzte Phase der AMSAT-Missionsziele erreicht. Diese sieht die Positionierung einer Amateurfunknutzlast in einer geostationären Erdumlaufbahn vor. Es'HailSat-2 wird einen 250 kHz breiten Lineartransponder für konventionellen Analogbetrieb sowie einen 8 MHz breiten Transponder für experimentelle digitale Modulationsarten und DVB-ATV an Bord haben. Die genauen Uplink- und Downlinkfrequenzen sind noch nicht abschließend festgelegt. Fest steht jedoch, dass der Uplink im Bereich 2,400 bis 2,450 GHz und der Downlink im Bereich 10,450 bis 10,500 GHz innerhalb der jeweiligen Amateurfunkzuweisungen liegen wird. Die Antennen beider Transponder werden große Öffnungswinkel aufweisen, sodass die maximal mögliche Fläche, d.h. ca. ein Drittel der Erdoberfläche, abgedeckt wird. Genaue technische Parameter werden innerhalb der nächsten Monate festgelegt. Es ist zu erwarten, dass nur eine verhältnismäßig einfache Stationsausrüstung für den Betrieb über diesen Satelliten erforderlich ist. Dieses bahnbrechende Projekt wird eine Phase neuer, spannender Amateurfunkaktivitäten auslösen. Die technische Expertise stellt ein vom AMSAT-DL-Vorsitzenden Peter Gülzow, DB2OS, geleitetes Team von Funkamateuren zur Verfügung.

September 2014..... User frequenzen festgelegt !!
User TX freq. for dvb-s and dvb-t : 2401,500MHz ~ 2409,500MHz ..... polarisation right cirkular
User RX freq. : 10,491GHz ~ 10,499GHz ..... polarisation linear

Voraussichtlich ab ende 2016 !!..... verschoben auf Juli-September 2017
Empfohlene min. Antennengröße + LNB 1,6dB Nf ..... für ein guten Empfang:
Randgebiete ................. ab 90cm ( wie Brasil oder Asien )
Skandinavische Länder ..... ab 80cm
Mittel und Südeuropa ....... ab 70 / 60cm
Nordafrika und Saudiarabien ....... 55cm
Zentralafrika ...... 50cm
Schmalband Lineartransponder wird erlauben gleichzeitiges arbeiten von 90 SSB Stationen.
Breitband Digital Transponder wird erlauben gleichzeitiges arbeiten 2 bis 4 DVB-S Stationen ( je nach Signalbandbreite )
Narrowband linear transponder will allow simultaneous work of 90 SSB stations.
Broadband digital transponder will allow simultaneous work 2 to 4 DVB-S stations (depending on the signal bandwidth)

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 2015 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

With the success of Es’hail-1 and the growing demand for a range of satellite services in the MENA region, we are currently working on the manufacture of our second satellite Es’hail-2.
Scheduled for launch in 2018, this high-powered, advanced satellite will further boost broadband delivery, broadcasting and global connectivity in Qatar, the entire region and beyond.
Es’hail-2 is being manufactured in Japan by MELCO (Mitsubishi Electric Corporation).
Es’hail-2 will have Ku-band and Ka-band capabilities and support TV distribution, telecoms and government services to strategic stakeholders and commercial customers who value broadcasting independence, interference resilience, quality of service and wide geographical coverage.
The satellite will also provide greater capability for anti-jamming protection and redundancy and back-up for Es’hail-1.
Es’hail-2 will also provide the first Radio Amateur Satellite Corporation (AMSAT) geostationary communication capability that connects users across the visible globe in one single hop and in real-time.
It will allow also the AMSAT community to validate and demonstrate their DVB standard.
Two Geostationary Ham Radio Transponders
AMSAT-DL President, Peter Guelzow DB2OS, has confirmed there will be two amateur radio transponders on the Geostationary Es’hail 2 satellite planned to launch at the end of 2016.
Peter Guelzow DB2OS has provided the following information:
Es’HailSat-2 will carry two geostationary “Phase 4” amateur radio transponders !!
As a result of a concept proposed by the Qatar Amateur Radio Society, Es’ Hailsat, the Qatar Satellite Company, have announced that their new, geostationary, Es’HailSat-2 communications spacecraft will provide transponders for use by radio amateurs. The spacecraft is expected to be ready for launch by the end of 2016.
Es’HailSat-2 will provide a 250 kHz linear transponder intended for conventional analogue (e.g. SSB / CW) operations in addition to another transponder which will have an 8 MHz bandwidth. The latter transponder is intended for experimental digital modulation schemes and DVB amateur television.
Precise uplink and downlink frequencies remain to be finalized but the uplinks will be in the 2.400-2.450 GHz and the downlinks in the 10.450-10.500 GHz amateur satellite service allocations.
Both transponders will have broad beam antennas to provide full coverage over about 1/3rd of the earth’s surface. Precise operational plans will be finalised over the coming months but it is anticipated that only quite simple ground equipment will be required to use this satellite.
A team of amateurs, led by Peter Guelzow DB2OS (President of AMSAT-DL) are providing technical support to this ground breaking project which is expected to provide an exciting new phase of activity for radio amateurs for the 21st century.

DSCN0862  UPconverter.jpg
Order: calvin@hides.com.tw INFO: oe7dbh@tirol.com
Zuletzt geändert von oe7dbh am 23.11.2018, 16:22, insgesamt 9-mal geändert.

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Re: 26°E first Ham geostationary transponder SSB and DATV

Beitrag von PE1CMO » 28.07.2018, 09:56

The PCB board is at home. Now we must solder the components and half August I will test.

This board includes a 27 MHz (25 MHz possible) low noise reference for the LNB, IF out 739.5 MHz
GPS clock reference
down converter from 739 MHz to 70cm
input attenuator max 30 Watts for the 70cm tranceiver
up converter from 70cm to 2400 MHz 20 Watt out


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Re: 26°E first Ham geostationary transponder SSB and DATV

Beitrag von oe7dbh » 23.09.2018, 23:22

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Re: 26°E first Ham geostationary transponder SSB and DATV

Beitrag von oe7dbh » 21.11.2018, 09:44

Following the successful launch on November 15th of Es'hail-2 on board the SpaceX Falcon 9 launch vehicle, once the satellite has been positioned in a test orbital slot, Mitsubishi and Es'hailSat will begin the In Orbit Testing (IOT) program - the positioning should be achieved in the next few days.
The IOT phase will take a few months, during which time the amateur radio payload will not be turned on and AMSAT-DL will be commissioning the Amateur transponder ground station in Dohar.
Once IOT is complete, the satellite will be moved to the final orbital slot at 26 degrees East and there will be an announcement by AMSAT-DL that the transponders are available for use.
Before this announcement, no attempt should be made to use the transponders as any interference to the test program will delay the release and if excessive interference is seen this may cause the satellite owners not to make the facility available for amateur use.
( Source: https://forum.batc.org.uk/viewtopic.php ... 734#p17331 )

Nach dem erfolgreichen Start von Es'hail-2 am 15. November an Bord der Trägerrakete SpaceX Falcon 9 beginnen Mitsubishi und Es'hailSat, sobald der Satellit in einem Testorbital positioniert wurde, mit dem In-Orbit-Testprogramm (IOT) - Die Positionierung sollte in den nächsten Tagen erreicht werden.
Die IOT-Phase wird paar Monate dauern. In dieser Zeit wird die Amateurfunk-Nutzlast nicht eingeschaltet und AMSAT-DL wird die Amateur-Transponder-Bodenstation in Dohar in Betrieb nehmen.
Sobald die IOT abgeschlossen ist, wird der Satellit bei 26 Grad Ost in den endgültigen Orbitalschlitz verlegt, und AMSAT-DL meldet, dass die Transponder zur Verfügung stehen.
Vor dieser Ankündigung sollte kein Versuch unternommen werden, die Transponder zu verwenden, da Interferenzen mit dem Testprogramm die Freisetzung verzögern. Wenn übermäßige Interferenzen festgestellt werden, kann dies dazu führen, dass die Satellitenbesitzer die Anlage nicht für Amateure zur Verfügung stellen.

Dopo il successo del lancio del 15 novembre di Es'hail-2 a bordo del veicolo di lancio SpaceX Falcon 9, una volta che il satellite è stato posizionato in uno slot orbitale di test, Mitsubishi ed Es'hailSat avvieranno il programma IOT (In Orbit Testing) - il posizionamento dovrebbe essere raggiunto nei prossimi giorni.
La fase IOT richiederà alcuni mesi, durante i quali il payload della radio amatoriale non verrà attivato e AMSAT-DL effettuerà la messa in servizio della stazione di terra del transponder amatoriale a Dohar.
Una volta completato IOT, il satellite verrà spostato nello slot orbitale finale a 26 gradi est e verrà annunciato da AMSAT-DL che i transponder sono disponibili per l'uso.
Prima di questo annuncio, non si dovrebbe tentare di utilizzare i transponder poiché qualsiasi interferenza con il programma di test ritarderà il rilascio e, se si notano interferenze eccessive, i proprietari dei satelliti potrebbero non rendere disponibile la struttura per uso amatoriale.

Après le lancement réussi le 15 novembre d'Es'hail-2 à bord du lanceur SpaceX Falcon 9, une fois le satellite placé dans une fente orbitale de test, Mitsubishi et Es'hailSat lanceront le programme de tests en orbite (IOT) - le positionnement devrait être réalisé dans les prochains jours.
La phase IOT prendra quelques mois, au cours desquels la charge utile de la radio amateur ne sera pas activée et AMSAT-DL mettra en service la station terrestre à transpondeur amateur à Dohar.
Une fois l'IOT terminée, le satellite sera déplacé vers la position orbitale finale à 26 degrés Est et AMSAT-DL annoncera que les répéteurs sont disponibles.
Avant cette annonce, aucune tentative d'utilisation des transpondeurs ne devrait être tentée, car toute interférence dans le programme de test retarderait la libération et, si une interférence excessive était constatée, les propriétaires de satellites pourraient ne pas rendre l'installation disponible pour un usage amateur.


Sobald es soweit ist und Transponder freigegeben ist, egal ob man aktiv teilnehmen wird oder passiv nur als Zuhörer bzw. Zuschauer braucht
jeder eine Empfangsantenne mit LNB. Wie oben bereits mitgeteilt wurde ...das dauert noch paar Monate,
wenn man aber bereits jetzt eine Antenne montieren will dann:
Nachdem ein geeignete Standort gefunden wurde ( mit freie Sicht Richtung 26°Ost ) und Antenne montiert ist , kommt nächste Schritt ---> Antennenrichtung richtig einstellen in horizontale und vertikale Position !
Zu diesen Zeitpunkt sollte bereits LNB an die Antenne dran sein, ob das ein original noch nicht umgebauter LNB oder bereits umgebauter ( für AMSAT P4-A ) LNB ist ist dem Benützer überlassen. Jetzt gibt es zwei Möglichkeiten:
1. ein DVB-S Haushaltgerät verwenden für die Badr4 Satellit suche ( Badr4 ist einziger Satellit am 26°Ost der auch Europa versorgt )
2. ein Sat Messgerät verwenden bei der suche
Bei erste variante mit einem original LNB dran werden sie lange Zeit brauchen bis Sie richtige Richtung eingestellt haben ( schon aus dem Grund weil Satellitensignal Badr4 Beam BSS sehr schwach ist, ca. 1/10 von Astrasignal auf 28°Ost ) , zu empfehlen ist erst Astra28°Ost zu finden ---> Antennenelevation auf maximum einstellen und fest einziehen ( die ändert sich nicht mehr ) ---> erst dann Satreceiver auf 11996MHz horizontal einstellen, die Antenne ganz ganz wenig Richtung Westen drehen genau um 2° …wenn alles korrekt gemacht ist und Sie Glück haben sollte Receiver in Transponder Suchmodus bereits die freien 10 Fernsehe und 9 Radio Programme gefunden haben.
Jetzt Antenne Feineinstellung auf maximum Empfangssignal noch machen und Schrauben fest anziehen. Jetzt ist die Antenne bereit für LNB tausch. Falls Sie die ganze Prozedur mit bereits umgebauten LNB machen ---> zb. mit LNB LO freq 9500MHz dann müssen Sie am Receiver 12246MHz Empfangsfrequenz einstellen.

Ich habe die variante 2 genommen, mit Hilfe eines Antennen Sat Messgeräts ……da geht die ganze Prozedur etwas schneller und man hat mehr Überblick und Sicherheit ( feinere Einstellmöglichkeit ) , ich habe gleich einen umgebauten LNB dran montiert ( mit 1GHz Ausgabe für DATV und 70cm Ausgabe für SSB )
Ich habe alle schritte gleich wie oben gemacht ( erst Astra 28°finden...Elevation fixiren… ) IF Frequenz berechnet ( 11996-10328,135MHz "22kHz" = 1667,865MHz ) und am Sat Messgerät eingestellt ----> Antenne horizontal gedreht um 2°Richtung westen ( am Analyzer beim drehen habe ich gesehen wie Astra Peaks kleiner werden und wenn auch viel schwächer Badr4 Peaks gekommen sind )
LNB auf maximum Signal gedreht....
Antennenhalterung festgezogen und das wars ( jetzt sind beide Antennen bereit für die Verwendung ).
Im haus habe ich nochmals die Signalstärke gemessen ( diesmal habe ich LNB port2 genommen ohne 22kHz Verwendung 11996-10057,4= 1938,6MHz )
OK , jetzt ist nur abzuwarten bis die Signale in Amateurfunkbereich kommen !!! Signal am LNB Kabelende derzeit sieht so aus:
SSB Bereich gezoomt , noch sieht schön sauber aus ohne Störungen

EshailSat2 Position derzeit: https://www.n2yo.com/?s=43700

Sehr braver Schreiberling
Beiträge: 78
Registriert: 19.04.2013, 09:04

Re: 26°E first Ham geostationary transponder SSB and DATV

Beitrag von DL3DCW » 02.12.2018, 18:04

Vielen Dank für die Anleitung!

Habe es gestern genauso gemacht. Klappte mit einem SAT-Messgerät recht einfach. Erreiche an einem 85cm Spiegel ein CN von etwa 12dB auf 11996H. Dank Badr4 empfange ich nun über 300 arabische TV-Sender ;-)

Sehr braver Schreiberling
Beiträge: 78
Registriert: 19.04.2013, 09:04

Re: 26°E first Ham geostationary transponder SSB and DATV

Beitrag von DL3DCW » 08.12.2018, 11:57

Habe nun auf 24° Ost gedreht da EsHail2 dort im Moment zwischengeparkt wird. Die Engineering Beacons auf 10706 MHz und 11205 MHz sind aktiv und konnten mit einem CN von mehr als 30dB CN empfangen werden. Baken und Transponder der AMSAT sind erwartungsgemäß nicht zu hören. Das wird auch wohl noch etwas dauern.

Station: 85cm Offsetspiegel, Octagon OSLO (Originalzustand), Nooelec NESDR Nano, Raspberry Pi 3+ mit 7" Touchdisplay, Software GQRX