RSGB Tonight @ 8 Video – Getting started on QO-100

Es'hail-2 Qatar-OSCAR-100On Monday, July 27 Dom Smith M0BLF gave an online talk – Getting started on QO-100as part of the RSGB Tonight @ 8 live webinar series.

Dom’s lockdown project was to complete a set up for the QO-100 amateur radio transponders that are hosted on the geostationary satellite Es’hail-2. This was the first amateur radio payload to be put into a geostationary orbit and provides constant and reliable coverage for amateur voice, data and television contacts over the whole of Africa, Europe and the Middle East and even as far as Brazil in the west, and Thailand in the east.

Getting started on QO-100 is a talk in two halves: first we’ll watch the video, showing the particular set-up chosen—and there are many!—and then there will be chance for a Q&A. The equipment list can be see at https://www.domsmith.co.uk/blog/2020/07/27/rsgb-webinar-on-qo-100/

Watch Getting Started on QO-100 by Dom Smith, M0BLF

Dom Smith, M0BLF has been a radio amateur for nearly 25 years since being licensed at the age of 14 in 1996. He is an active member of the Camb-Hams and Cambridge University Wireless Society (CUWS), and may often be heard contesting, climbing hills for Summits on the Air, and assisting Cambridgeshire RAYNET. He also enjoys travelling for DXPeditions, most recently as JW/M0BLF, VP2MUW and ZC4UW, and he manages QSL cards for most CUWS trips. On top of all that, he volunteers with Cambridge 105 Radio, the local community broadcast station, on the engineering team.

Professionally, Dom works as a Cloud Solutions Architect in the software team at the Royal Society of Chemistry and he holds a PhD in Hispanic Studies.

Watch other RSGB Tonight @ 8 videos at https://www.youtube.com/user/TheRSGB/videos

QO-100 information https://amsat-uk.org/satellites/geo/eshail-2/

QO-100 products in the AMSAT-UK shop https://amsat-uk.org/

Ofcom statement on 5725-5850 MHz

On Friday, July 24, Ofcom released their statement on 5725-5850 MHz and 5925-6425 MHz.

The main points are:
• Make 5925-6425 MHz available for Wi-Fi and other RLAN technologies
• The release of this spectrum will also enable very low power (VLP) outdoor use
• Remove the Dynamic Frequency Selection (DFS) requirements from channels used by Wi-Fi in the 5725-5850 MHz Amateur and Amateur Satellite Service allocation

The Amateur Satellite Service weak-signal downlink band, 5830-5850 MHz, is used by amateur payloads on Deep-Space and Interplanetary spacecraft as well as by satellites in Low Earth Orbit (LEO). Increased use of Wi-Fi across these frequencies could obliterate the weak amateur satellite signals.

Ofcom statement
https://www.ofcom.org.uk/consultations-and-statements/category-2/improving-spectrum-access-for-wi-fi

In 2013 CEPT looked at increased use of 5725-5850 MHz
https://amsat-uk.org/2013/08/29/cept-considers-use-of-5830-5850-mhz-satellite-band/

Wi-Fi Channels in the 5 GHz Band

OSCAR Satellite QSO Party 1 Aug – 22 Sept

Fun in space with Amateur RadioThe objective of the AMSAT-UK OSCAR Satellite QSO Party is to encourage all radio amateurs around the world to get on the air and make contacts via satellites during northern hemisphere summer. We would like to attract both seasoned die-hard operators as well as all newcomers who are just getting involved.

While points are given per QSO this isn’t a contest, but we hope it will encourage people to get on the air and enjoy the excitement of making contacts through satellites.

The AMSAT-UK OSCAR Satellite QSO Party will be supported by an online leaderboard which will be available from the start of the event which runs from 00:00 GMT on 1st August until 23:59 GMT on 22nd September.

Prizes will be awarded to those from first to thirteenth place and are open to both AMSAT-UK and non-members around the world.
● First Place £250 Amazon Voucher
● Second Place £150 Amazon Voucher
● Third Place £50 Amazon Voucher
● Fourth to Thirteenth Place One Year AMSAT-UK Membership

Download the rules for the AMSAT-UK OSCAR QSO Party

Leaderboard https://leaderboard.amsat-uk.org/

Unauthorized transmissions in 144 MHz satellite allocation

Water Vitalizer Interference - DC4CX

Water Vitalizer Interference – DC4CX

The DARC reports unauthorized transmissions are taking place in the 144 MHz satellite segment of the 2m amateur radio primary allocation.

A translation of the DARC post reads:

In the 144.010 MHz to 144.020 MHz range, illegally operated transmitters are increasingly being operated as “water vitalizers” or “water energizers”. The manufacturer specifies 144.015 MHz as the transmission frequency in its product description.

The DARC EMC department asks for further information with location information about conspicuous signals in this frequency range, in preparation for collective complaints.

The devices apparently generate fields with considerable field strength and a long range. The signals appear increasingly in the morning or in the evening. The illegal transmitters are typically in operation for 5 to 60 minutes (integer multiples of 5 minutes). The signal is generally very stable in frequency, but occasionally shows short-term fluctuations of up to a few 100 Hz. Otherwise the carrier is not further modulated.

The frequency range 144.000 MHz to 146.000 MHz is assigned to the amateur radio service in Germany as the primary exclusive user.

A video of the interference caused by these devices and a map showing some of the cases so far detected in Germany can be seen at https://www.darc.de/der-club/referate/emv/

LO-94 Amateur Radio in Lunar Orbit

Longjiang-2 / LO-94 in Lunar Orbit

Longjiang-2 / LO-94 in Lunar Orbit

Nature carries an article about the spacecraft Longjiang-2 / Lunar-OSCAR 94 (LO-94), built by students at the Harbin Institute of Technology, that carried the first Amateur Radio communication system to operate in lunar orbit.

As a part of China’s Chang’e-4 lunar far side mission, two lunar microsatellites for low frequency radio astronomy, amateur radio and education, Longjiang-1 and Longjiang-2, were launched as secondary payloads on 20 May 2018 together with the Queqiao L2 relay satellite.

On 25 May, 2018, Longjiang-2 successfully inserted itself into a lunar elliptical orbit of 357 km × 13,704 km, and became the smallest spacecraft which entered lunar orbit with its own propulsion system. The satellite carried the first amateur radio communication system operating in lunar orbit, which is a VHF/UHF software defined radio (SDR) designed for operation with small ground stations.

This article describes and evaluates the design of the VHF/UHF radio and the waveforms used. Flight results of the VHF/UHF radio are also presented, including operation of the radio, performance analysis of downlink signals and the first lunar orbit UHF very-long-baseline interferometry (VLBI) experiment.

Read the article at https://www.nature.com/articles/s41467-020-17272-8

Cartoon movie – Longjiang-2 / LO-94: Journey to the Moon
https://amsat-uk.org/2020/06/06/longjiang-2-lo-94-journey-to-the-moon/

Summer issue of OSCAR News now available

OSCAR News Issue 230 June 2020 Front CoverE-members of AMSAT-UK can now download the June 2020 edition of OSCAR News, issue 230, here.

The paper edition edition will be sent to postal members and should arrive in the next 2-3 weeks.

In this issue:
• From the Secretary’s Keyboard
• Meetings & Events
• Filtered 2400 MHz Driver Amplifier Kits Now Available
• AMSAT-UK Shop Update
• AREx – Gateway Amateur Radio Exploration
• AMSAT-UK Sunday Morning Nets
• Schedule released for E2STAYHOME satellite operation
• A Filtered S-Band Driver Amplifier for Software Defined Radios
• FUNcube-1 in continuous transponder mode
• The “Ekran” Heli-yag, a hybrid antenna for circular polarisation
• Huskysat-1 Transponder is Open
• Raspberry Pi FUNcube satellite telemetry decoder now available
• SMOG-P: A Successful Space Project
• Report from the IARU Region 1 Satellite Coordinator – July 2020

AMSAT-UK FUNcube Mission Patch

AMSAT-UK FUNcube Mission Patch

Membership of AMSAT-UK is open to anyone who has an interest in amateur radio satellites or space activities, including the International Space Station (ISS).

E-members of AMSAT-UK are able to download the quarterly publication OSCAR News as a convenient PDF that can be read on laptops, tablets or smartphones anytime, anyplace, anywhere. Join as an E-member at Electronic (PDF) E-membership

PDF sample copy of “Oscar News” here.

Join AMSAT-UK using PayPal, Debit or Credit card at
http://shop.amsat-uk.org/

E-members can download their copies of OSCAR News here.