Geostationary Amateur Radio Transponder Talk and Demonstration

Coverage area of Es'hail 2

Coverage area of Es’hail 2

On Saturday, October 14 at 1:45pm BST (1245 GMT) AMSAT-DL President Peter Guelzow DB2OS will give a presentation on the Es’hail-2 Geostationary Satellite Amateur Radio Transponders to the AMSAT-UK International Space Colloquium in Milton Keynes.

It is expected the presentation will include a demonstration of the P4A transponder simulator. All attendees are welcome to bring any equipment they have for CW/SSB or DATV for the 2.4 GHz and 10.5 GHz bands. The transponder mimics the real thing: 2400-2410 MHz uplink to 10489.5-10499.5 MHz downlink.

This year the AMSAT-UK Colloquium is taking place as part of the RSGB Convention at the Kents Hill Park Conference Centre, Timbold Drive, Milton Keynes, MK7 6BZ on the weekend of October 14-15. Tickets to the event are available at the door or you can book in advance at
http://rsgb.org/main/about-us/rsgb-convention/

The Colloquium is talking place in Lecture Room 5, download the programme schedule from
http://rsgb.org/main/about-us/rsgb-convention/rsgb-convention-programme/

Live streaming of Colloquium talks https://amsat-uk.org/2017/10/11/live-streaming-space-colloquium-mk/

New Geostationary Transponders

Es'hail-2 coverage from 26 degrees EastThe AMSAT-UK International Space Colloquium at the Holiday Inn, Guildford will hear presentations from Peter Gülzow DB2OS and Achim Vollhardt DH2VA on the new geostationary amateur radio satellite transponders currently planned to launch in the 3rd quarter of 2017.

The two transponders will provide SSB, Digimode, CW and Digital Amateur TV communications between five continents.

On Saturday, July 30 Peter Gülzow DB2OS will talk about the Phase 4A flight segment while Achim Vollhardt DH2VA will describe the ground station requirements.

The event over the weekend of July 30-31 is open to all, admittance is £10 per day, car parking is free. Those wishing to find out about amateur space communications are most welcome to attend.

Phase-4A Geostationary Transponders https://amsat-uk.org/2016/06/24/phase-4a-geostationary-transponders/

Further information on the event at https://amsat-uk.org/colloquium/

Phase-4A Geostationary Transponders

Es'hail-2 coverage from 26 degrees EastEs’hail 2 is a geostationary satellite which will carry two amateur radio transponders.

The launch of the Es’Hail-2 satellite into a geostationary orbit is currently planned for the 3rd quarter of 2017. The coverage area of the Narrowband (NB) and Wideband (WB) transponders should extend from Brazil to Thailand.

The two “Phase 4” amateur radio non-inverting transponders will operate in the 2400 MHz and 10450 MHz bands. A 250 kHz bandwidth linear transponder is intended for conventional analogue operations and an 8 MHz bandwidth transponder for experimental digital modulation schemes and DVB amateur television.

Narrowband Linear transponder
 2400.050 -  2400.300 MHz Uplink Right Hand Circular Polarization
10489.550 - 10489.800 MHz Downlink Vertical Polarization

Wideband digital transponder
 2401.500 -  2409.500 MHz Uplink Right Hand Circular Polarization
10491.000 - 10499.000 MHz Downlink Horizontal Polarization

Download the Eshail-2 P4-A Amateur Radio Leaflet 2016-06-24

A LEILA-2 system, similar to LEILA flown on AMSAT OSCAR-40 (P3-D) will be used for Traffic Control and Telemetry Beacons. The mayor difference is, that this is a ground-based system which will be installed at the Es’hailSat Satellite Control Center (SCC) near Doha in Qatar.

LEILA-2 will analyze the downlink power levels in the passband of the NB-transponder and automatically generate a Siren to remark users to decrease their uplink power.

LEILA-2 is a joint development of AMSAT-DL’s Achim Vollhardt DH2VA and AMSAT-UK’s Howard Long G6LVB.

LEILA is an German acronym for “LEIstungs Limit Anzeige”, which means: Power Limit Indicator.

The following video gives a first insight to the Es’hail-2 LEILA-2 hardware concept

Watch Es’hail 2 AMSAT-DL LEILA 2 Transponder

Es’Hail-2 Geostationary P4-A Transponder Frequencies

Es'Hail-2 Geostationary P4-A Transponder Frequencies

Es’Hail-2 Geostationary P4-A Transponder Frequencies

The launch of the Es’Hail-2 satellite into a geostationary orbit at 25.5 degrees East is planned for the 3rd quarter of 2017. The coverage area of the amateur radio Narrowband (NB) and Wideband (WB) transponders should extend from Brazil to Thailand.

Es'hail-2 coverage area

Es’hail-2 coverage area

Es’hail 2 will carry two “Phase 4” amateur radio non-inverting transponders operating in the 2400 MHz and 10450 MHz bands. A 250 kHz bandwidth linear transponder intended for conventional analogue operations and an 8 MHz bandwidth transponder for experimental digital modulation schemes and DVB amateur television.

Narrowband Linear transponder
 2400.050 -  2400.300 MHz Uplink
10489.550 - 10489.800 MHz Downlink

Wideband digital transponder
 2401.500 -  2409.500 MHz Uplink
10491.000 - 10499.000 MHz Downlink

Equipment requirements:

X-Band 10 GHz Downlink:
– 89 cm dishes in rainy areas at EOC like Brazil or Thailand
– 60 cm around coverage peak
– 75 cm dishes at peak -2dB
– NB: linear vertical polarisation
– WB: linear horizontal polarisation

S-Band 2.4 GHz NB-Uplink:
– narrow band modes like SSB, CW
– 5W nominal Uplink power (22.5 dBi antenna gain, 75cm dish)
– RHCP polarisation

S-Band 2.4 GHz WB-Uplink (DATV):
– wide band modes, DVB-S2
– peak EIRP of 53 dBW (2.4m dish and 100W) required
– RHCP polarisation

Presentation on Es’hail by Peter Guelzow DB2OS, President of AMSAT-DL, at the 2013 AMSAT-UK Colloquium http://www.batc.tv/streams/amsat1306

Geostationary / Geosynchronous ham radio satellite transponders

Possible coverage of Geosynchronous satellite 74 degrees West - Credit Bill Reed NX5R

Possible coverage of a Geosynchronous satellite at 74 degrees West – Credit NX5R

EngineerIT magazine reports on the quest by radio amateurs to get transponders on geostationary satellites.

Coverage area of Es'hail 2

Coverage area of Es’hail 2

The article quotes President of AMSAT DL, Peter Gülzow DB2OS, and describes the transponders planned for the Es’Hail-2 satellite, expected to be launched in the 3rd quarter of 2017 into a geostationary orbit at 26 degrees East.

Also mentioned is a project to build a transponder for a US satellite which could be in a geosynchronous orbit around 74 degrees West.

Read the EngineerIT article at
http://www.ee.co.za/article/radio-amateurs-quest-geostationary-satellites.html

What is a Geosynchronous orbit ? https://amsat-uk.org/satellites/geosynchronous/

Es’Hail-2 https://amsat-uk.org/satellites/geosynchronous/eshail-2/

AMSAT Phase 4 Update for Palomar Amateur Radio Club November 4, 2015
http://www.ntms.org/files/Feb2016/PARC_4on4.pdf
https://amsat-uk.org/2015/11/08/geosynchronous-ham-radio-project-video/

Fox-1 launch 2015 and Geosynchronous Sat on 5 and 10 GHz 2017

Millennium Space Systems AQUILA M8 Series Satellite Structure

Millennium Space Systems AQUILA M8 Series Satellite Structure

ARRL Publications Manager and QST Editor Steve Ford, WB8IMY, reports on Amateur Satellite news from the Dayton Hamvention.

AMSAT FOXThe ARRL website reports the launch of the Fox-1 CubeSat has been delayed until October 8, 2015. Fox-1 will carry a 435/145 MHz FM Voice Transponder, see http://www.amsat.org/?page_id=1113

The ARRL story continues: AMSAT Vice President-Engineering Jerry Buxton, N0JY, said that a geosynchronous satellite, planned to launch in 2017, will offer uplinks on 5 GHz and downlinks on 10 GHz.

Buxton explained that the geosynchronous footprint will not be absolutely fixed; some variation may require some up/down movement of the user’s dish at certain times — although not continuously. He said AMSAT is working on this issue in terms of what to recommend for ground stations, but that even in the worst case, a user with a fixed antenna would still be able to enjoy several hours of access each day.

The transponder for the new satellite will be software defined and capable of supporting many different modes, including analog SSB.

AMSAT announced in late April that, if all goes according to plan, an Amateur Radio payload will go into space on a geosynchronous satellite that’s planned for launch in 2017. The satellite’s potential footprint could extend over the US from the Mid-Pacific to Africa. AMSAT has accepted the opportunity to be a “hosted payload” on a spacecraft that Millennium Space Systems (MSS) of El Segundo, California, is under contract to design, launch, and operate for the US government. The Amateur Radio payload must be delivered for testing and integration by next spring.

Source http://www.arrl.org/news/dayton-hamvention-2015-day-1-big-crowd-some-rain-satellite-news

A graphic showing an example of a typical Geosynchronous orbit can be seen at
http://www3.sympatico.ca/n.rieck/docs/sirius.html

 The 2.325 GHz signals from the Sirius satellites in Geosynchronous orbit over North America have been received in the UK.