Tag Archives: Ham Radio

Jun 24 2016

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

Jun 22 2016

India launches ham radio satellites

Swayam-1 CubeSat Flight Model - Credit COEP

Swayam-1 CubeSat Flight Model – Credit COEP

On June 22, 2016 the Indian Space Agency ISRO successfully launched several satellites carrying amateur radio payloads.

The CSAT Swayam satellite was one of those launched. The 1U CubeSat carries a digital store and forward messaging system for use by the amateur radio community.

Rupesh Lad VU2LRD / VU2COE from the College of Engineering Pune CSAT Team says:

“We are eagerly waiting for your reception report of CW Morse Beacon at 437.025 MHz. You can also get the decoded Beacon Data by entering beacon in Swayam Beacon Decoder available on our website.”

The post launch TLEs for tracking the satellite are at http://www.coep.org.in/csat

Download the COEP Swayam Leaflet PDF

Frequencies of other satellites on the launch
https://amsat-uk.org/2016/05/25/amateur-satellite-launch-from-india/

Spaceflight Now story https://www.nasaspaceflight.com/2016/06/pslv-xl-launch-20-satellites/

Jun 21 2016

Amateur Satellites at Skills Night

Steve Hedgecock M0SHQ with Elk 145/435 MHz Log Periodic Antenna

Steve Hedgecock M0SHQ with Elk 145/435 MHz Log Periodic Antenna

Steve Hedgecock M0SHQ explained how to operate via the amateur radio satellites at Skills Night hosted by the Chelmsford Amateur Radio Society on Monday, June 20, 2016.

He showed how to use the Elk dual-band 145/435 MHz Log Periodic Antenna to track the satellites and make contacts over thousands of kilometres using just 5 watts from a handheld transceiver.

Steve described how he recently managed to use the AO-85 satellite to contact the Isle of Arran DXpedition station GS3PYE using 5 watts and just the handheld’s quarter wave whip antenna. It should be noted though that a small handheld Yagi is recommended for AO-85.

As part of his display Steve had the popular book Getting Started with Amateur Satellites which is an excellent introduction for newcomers.

Sam Jewell G4DDK with one of his popular Microwave antennas

Sam Jewell G4DDK with one of his popular Microwave antennas

Also attending the Skills Night was long-time supporter of AMSAT-UK Sam Jewell G4DDK. He brought along his stall of UHF/Microwave antennas, pre-amps and other useful accessories.

Dave Powis G4HUP had his extensive selection of his kits, plus tools for working with SMD (Surface Mount Devices). During the evening he provided advice to attendees on a range of RF and construction related topics.

Both Dave and Sam have been regular attendees at the AMSAT-UK International Space Colloquium in Guildford which this year takes place July 30-31, further information at https://amsat-uk.org/colloquium/

hupRF kits http://www.huprf.com/

G4DDK kits and accessories http://www.g4ddk.com/

Further information on the monthly Skills Night meetings can be found at http://g0mwt.org.uk/skills

Dave Powis G4HUP with his RF kits

Dave Powis G4HUP with his RF kits

Jun 21 2016

Colloquium – Final Call for Speakers

FUNcube-1 flight model - Image credit Wouter Weggelaar PA3WEG

AO-73 (FUNcube-1) – Image credit Wouter Weggelaar PA3WEG

This is the final call for speakers for the AMSAT-UK International Space Colloquium 2016 which will be held from Saturday, July 30 to Sunday, July 31, 2016 at the Holiday Inn, Guildford, GU2 7XZ, United Kingdom.

AMSAT-UK invites speakers, to cover topics about Amateur satellites, CubeSats, Nanosats, space and associated activities, for this event.

They are also invited to submit papers for subsequent publishing on the AMSAT-UK web site or Oscar News.

Those wishing to participate should contact Dave, G4DPZ, dave at g4dpz dot me dot uk

Further information https://amsat-uk.org/colloquium/

73 Dave G4DPZ

Jun 19 2016

K1D to Operate Satellites on Field Day

Drew Glasbrenner M-KO4MA AUK Colloquium 2015

Drew Glasbrenner M/KO4MA working FO-29 at the AMSAT-UK Colloquium 2015

Field Day is always the fourth full weekend of June, beginning at 1800 UT Saturday and running through 2059 UTC Sunday. Field Day 2016 is June 25-26.

In an effort to encourage more kids and their families to get involved in the hobby, the kids at Ham Radio (dot) World are working to put an all-kids Special Event ARRL Field Day station on the air in 2016. This station will have the special event call sign of K1D and it will be set-up, operated, and put away by kids who are ham radio operators.

Kids of all ages and their parents (both licensed hams and non-hams alike) are encouraged to come out and participate in this exciting event.  New hams and even non-hams can experience the excitement of talking to people around the world with the Get On the Air (GOTA) station, which will have the callsign K4G. Both stations will operate from grid EL99IA in Deland, Florida, USA.

The kids will be on the HF bands and on the Amateur Radio satellites.

K1D will be joined by AMSAT’s Vice-President Operations, Drew Glasbrenner, KO4MA, who will be a kid-for-a-day to help get the kids on the linear satellites.  Look for them and give them a shout!

Field Day http://www.arrl.org/field-day

Ham Radio World http://hamradio.world/

Source ANS http://www.amsat.org/?page_id=443

Jun 17 2016

Data modes on ham radio satellites

Tony Bombardiere K2MO has released a video showing operation of PSK31, PSK63 and Hellshreiber on the amateur radio satellites.

He demonstrates WinPSK and IZ8BLY’s Hellschreiber which both have satellite capabilities. Essentially, the applications make it easy for the operator to monitor digital signals on the satellites downlink while simultaneously transmitting on the satellites uplink; it’s accomplished by utilizing the sound cards full-duplex operation.

Watch Digital Modes Via Satellite

DopplerPSK software http://www.frontiernet.net/~aflowers/dopplerpsk/dopplerpsk.html