ARISS Voice Operation in 2 Meter WSPR Segment in IARU Regions 2 & 3

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KP4MD
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ARISS Voice Operation in 2 Meter WSPR Segment in IARU Regions 2 & 3

Here are a few points to consider in resolving the issue of potential interference with ARISS voice uplink operations in the 2 meter WSPR frequency segment outside of IARU Region 1:

  1. WSPR activity has occurred on 2 meters since the inception of WSPR and will continue into the future. Joe Taylor K1JT mentions 2 meter WSPR activity in the Pacific Northwest as early as April 2008 when the WSPR program was first released. http://groups.yahoo.com/group/wsjtgroup/message/4727
  2. The G4ILO WSPR page documents 144.490 MHz as the preferred 2 meter WSPR frequency in 2008. http://www.g4ilo.com/wspr.html
  3. In the IARU Region 1 band plan, 94 nations (a majority of IARU member societies) have concurred on 144.4905 MHz (144.489 MHz dial) as the designated world-wide WSPR frequency on 2 meters. 2 meter frequency allocations in Region 1 are much more constrained than elsewhere as their band encompasses only 144-146 MHz. Therefore Regions 2 and 3 should follow the lead of Region 1 rather than expect Region 1 to change its established band plan. http://www.iaru-r2.org/wp-content/uploads/R1-VHF-UHF-Bandplan.pdf
  4. Although IARU Region 2 (the Americas) currently lacks a VHF band plan, this is an agenda item for the IARU Region 2 General Assembly scheduled for September 2013. A good case may be made for 2 meter WSPR activity in Region 2 to continue in the current WSPR frequency segment of 144.4905 MHz. http://www.iaru-r2.org/band-plans/
  5. Since June of this year, WSPRnet statistics would indicate that 2 meter WSPR network activity has grown to account for probably over 99% of the current regular worldwide activity on 144.4905 MHz. https://picasaweb.google.com/lh/photo/z-JQdo2jRwePdiH_Os1LmNMTjNZETYmyPJ...
  6. By its nature and design, all WSPR network operation should occur within one 200 Hz segment on each band. On the other hand, the ISS has at its disposal several alternate 2 meter uplink frequencies that it regularly uses for scheduled voice operations. Therefore, it would seems logical that the ISS is more conveniently able to operate outside the 2 meter WSPR segment.

I believe that this matter can be reasonably and expediently resolved between AMSAT and WSPRnet to allow the continued operation of both ARISS and WSPR network stations on the 2 meter band.

Carol
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