Tag Archives: Satellite

Featured, General, Newsletter, On The Air, Space

Making Contacts Through LEO Satellites

I’ve been having a lot of fun this past week learning to operate using satellites. It is amazing how many LEO satellites are operational right now!

LEO Satellites - Antennas
Satellite Antennas

We built an improved portable LEO satellite station a little while back and used it for the first time during a Technician License Class that we taught earlier this spring.

We decided to set up the station in our back yard about a week ago. The idea was to spend some more time learning to operate the station and to improve our satellite operating skills.

The past week has been a productive one. Here are some stats for our satellite operations during the last 7 days –

  • Contacts Made: 78
  • Modes Used: SSB Phone, FM Phone, CW and Packet (APRS FM)
  • Satellites Worked – 9 Total plus the ISS: AO-7, AO-85, ARISS (International Space Station), FO-29, SO-50, XW-2A, XW-2B, XW-2C, XW-2D, and XW-2F
  • States Worked: 23
  • Grids Worked: 49

The week began with a visit from Curtis, N1CMD who has quite a bit of experience with Digital Packet operation via the digipeater on the ISS. After some experimentation, Curtis helped me to find a setup using a SignaLink Sound Card and a second, windows computer that works well for Packet QSOs. I tested the setup using the terrestrial APRS network to get all of the hardware and software working correctly. The combination was then used to make a first packet contact using the ISS.

Operational LEO Satellites

The LEO satellites which are currently operational support a mix of split band modes. All of the satellites that we’ve worked so far use either 2M/70cm or 70cm/2M up and downlinks. The satellites support a variety of operating modes including via single channel FM, linear transponders, and APRS packet systems. Operating skills such as proper adjustment of up and downlink frequencies, Tx power management and setup of the digital packet system have been at least partially mastered this past week.

There are a great bunch of folks who are regulars on the satellites and we have made some new friends in our short time operating through satellites. The single channel FM satellites are usually too busy to support rag-chewing. The linear transponder satellites (there are many of these) support several conversations at the same time and we have had some nice rag-chew sessions on these birds.

There is also a good bit of DX to be had via satellites. This past week we have worked Patrick, FJ/N2IEN in Saint Barthelemy; Chris, 9Y4D in Trinidad and Tobago; Burt, FG8OJ in Guadeloupe; Fausto, HC9VF in Ecuador; and several stations in Canada.

We are planning to set up our portable satellite station at Field Day this year. Curtis will be the main operator/station master for our satellite station. If you are interested in learning more about satellite operations, please let Curtis or I know and we’ll help you to learn more during Field Day 2017.

Fred, AB1OC

Featured, General, Newsletter, Space

New Amateur Satellite: EO-88 aka Nayif-1

Source: EO-88 aka Nayif-1 | AMSAT-UK

AMSAT-UK and AMSAT-NL are delighted to announce that a FUNcube communications package has been selected as a major payload for the Nayif-1 CubeSat mission.

Nayif-1 Mission Patch

This mission is intended to provide Emirati students with a tool to design and test systems in space. It is being developed by the Emirates Institution for Advanced Science and Technology (EIAST) in partnership with American University of Sharjah (AUS).

It is expected that this payload will provide a large amount of valuable environmental data from space together with a new, enhanced, UHF to VHF linear transponder.

The AMSAT team will be working closely with the Emirati students, in collaboration with support partner, ISIS – Innovative Solutions In Space B.V. from the Netherlands, to develop this new system in time for the launch which is scheduled to take place early 2016.

Looks like this new satellite is now available for Amateur Radio use. I have not had a chance to try to work contacts through it yet. Here’s the transponder information:

Communication subsystem

Inverting SSB/CW transponder 300 mW

  • 435.045 – 435.015 MHz Uplink
  • 145.960 – 145.990 MHz Downlink

Operational when in eclipse

Telemetry subsystem

145.940 MHz BPSK Telemetry 300 mW

Operational when in sunlight

More information about EO-88 may be found on the AMSAT-UK page for this satellite.

Featured, General, Newsletter, Space

ARISS to Swap Out Handheld VHF Transceivers on Space Station

The 10th SpaceX International Space Station cargo resupply mission delivered investigations to study human health, Earth science, and weather patterns last Thursday. It also carried a new Ericsson 2-meter handheld radio to replace one that failed a few months ago, disrupting the Amateur Radio on the International Space Station (ARISS) program. The VHF radio in the Columbus module was used for school group contacts and for Amateur Radio packet, temporarily relocated to UHF after the VHF radio failure. ARISS International Chair Frank Bauer, KA3HDO, said the new Ericsson radio will, at some point, be installed in Columbus, replacing the Ericsson UHF radio now supporting APRS packet and some school contacts. Bauer made it clear that the new Ericsson transceiver is an interim measure for ARISS.

Looks like the ISS will have crew Amateur Radio communications back sometime in the not too distant future. You can read the full article from the March ARRL Newsletter here.

Fred, AB1OC

Radio Amateurs Developing Skills Worldwide