Archivos de la categoría AMSAT

IARU Team at WRC-19

The second week of the World Radiocommunication Conference reports on the status of two issues affecting the amateur satellite service.

In a report written by Dave Sumner, K1ZZ, first is an agenda item currently under review during this WRC-19 session; second is planning for future pressure on frequencies for the amateur satellite service.

Current WRC-19

While it does not directly affect us – work at WRC-15 saw to that – we are following an agenda item that seeks spectrum for telemetry, tracking and command in the space operation service for non-GSO satellites with short duration missions (CubeSats, among others).

We would like a solution to be found to cut down on the misuse of the very limited amateur-satellite spectrum for commercial applications. Discussions are focusing on spectrum near 137 MHz (down) / 149 MHz (up) but reaching agreement is proving to be very difficult.

Future – WRC-23

With the spectrum from 8.3 kHz to 275 GHz fully allocated and some bands above 275 GHz already identified for particular uses, any proposal for new allocations involves sharing with one or more incumbent services.
The pressures for spectrum access to accommodate new uses for commercial purposes are intense; for an established service such as ours, any WRC that does not reduce our own useful spectrum access is a success.

The idea of including the amateur two meter band in a study of non-safety aeronautical mobile service applications has not resurfaced. However, the IARU is concerned with a proposed item for WRC-23 entitled: “Review of the amateur service and the amateur-satellite service allocations to ensure the protection of the radionavigation-satellite service (space-to-Earth) in the frequency band 1240-1300 MHz.”

Our regulatory status is already clear. The amateur service is secondary in this band and the amateur-satellite service is permitted to operate in the Earth-to-space direction on a non-interference basis in the band 1260-1270 MHz. In the international Radio Regulations this is all the protection a primary service such as radionavigation-satellite requires; implementation is up to individual administrations.

The one well-documented case of interference to a Galileo receiver that prompted this proposed agenda item occurred more than five years ago and was quickly resolved by the administration concerned. There have been no known interference cases to user terminals.

An amateur service allocation of 1215-1300 MHz was made on a primary, exclusive basis in 1947, later downgraded to secondary to accommodate radiolocation (radar) and narrowed to 1240-1300 MHz. The radionavigation-satellite service was added in 2000. As a secondary service amateur radio has operated successfully in the band for many years.Given the relatively modest density and numbers of amateur transmissions in the band, we view the Galileo-oriented proposal for an agenda item as disproportionate.

The IARU recognizes the concern and does not want the amateur service to affect the operation of the Galileo system in any way. It has already updated its operational recommendations for amateur stations in Region 1. If necessary, further recommendations may be developed and rolled out globally.

In CEPT, two preliminary measurement studies of Galileo receiver performance/vulnerability (from 2015 and 2019) are currently being evaluated. Discussions can be more timely and focused within CEPT.

The IARU believes that this process already offers the potential for a satisfactory solution and thus the issue does not warrant WRC action and the commitment of ITU resources.

Source: http://www.iaru.org/news–events

Read the RSGB WRC-19 updates at https://rsgb.org/main/blog/category/news/special-focus/wrc-19/

UNB CubeSats Group photo by Annette Wetmore

On October 7, 8 and 9, 2019, the University of New Brunswick’s (UNB) Department of Electrical and Computer Engineering and CubeSat NB hosted the first of three Preliminary Design Review (PDR) meetings for the Canadian CubeSat Project initiated by the Canadian Space Agency (CSA).

The Canadian Space Agency is providing support and guidance to 15 teams of university and college students across Canada who are building satellites. These satellites are in the “CubeSat” format, based on a standardized architecture of 10 cm cubes. All 15 proposed satellites will be deployed from the International Space Station (ISS), possibly starting in 2021.

Radio Amateurs of Canada was present because many of the CubeSat projects are proposing to use Amateur Radio frequencies. RAC Atlantic Director Dave Goodwin, VE9CB, attended the PDR to offer RAC’s insight into these projects and to discuss the processes required to secure frequency coordination for these projects through the International Amateur Radio Union (IARU).

At the meeting at UNB, six teams led by students from UNB, the Université de Moncton, New Brunswick Community College, the University of Prince Edward Island, Dalhousie University (NS), Memorial University of Newfoundland with C-CORE, the Université de Sherbrooke (QC) and Concordia University (QC), presented their work to date on designing six satellites. They sought feedback and suggestions from other teams as well as the federal government agencies – the Canadian Space Agency (CSA), Global Affairs Canada (GAC), Innovation, Science and Economic Development Canada (ISED) – and NanoRacks, the US-based company that provides launch services for the Canadian CubeSat Project.

Following the Fredericton event, similar meetings were also held in London, Ontario and Victoria, British Columbia for Preliminary Design Reviews of the nine other CubeSats in the Canadian CubeSat Project in Ontario, western Canada, and northern Canada.

Designing and constructing CubeSats is a complicated, multi-year process. These projects will develop these students’ skills in many facets of engineering, science, technology, business and project management. Once in orbit, these satellites will assist pure and applied scientific research. Some of these satellites may offer facilities that Radio Amateurs across Canada and around the world can use.

– Dave Goodwin, VE9CB and Brent Petersen, VE9EX.

Source Radio Amateurs of Canada (RAC) Bulletin

RSGB Spectrum Forum Chair Murray G6JYB talking to delegates at WRC-19

IARU Team at WRC-19