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WSPR - Weak Signal Propagation Reporter
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WSPR - Weak Signal Propagation Reporter Facebook Group
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Here is an updated map of 144 MHz WSPR Study Stations and Propagation Paths.  Download and open the KML file in Google Earth to view the elevation profiles.
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Combining three days of recent 144 MHz WSPR study group data, observed clusters of spot reports indicate specific times of the day when propagation appears to favor those signal paths to other study group stations.  See more at http://www.qsl.net/kp4md/144_mhz_wspr.htm
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Ham Radio Digital Modes
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Pacificon/ARRL National Convention attendees are welcome to a VHF/UHF WSPR Propagation Group meeting this Saturday October 13 from 12-1 pm in Salon D at the Marriott Santa Clara, California.

At our meeting this Saturday, we plan a PowerPoint presentation with VHF WSPR basics for newcomers, followed by a forum to share our accomplishments, challenges, and for questions, answers and discussion about the future direction of VHF/UHF WSPR activity.

We would welcome receiving any suggestions, photos, slides etc via e-mail even if you are unable to attend.

Carol, KP4MD/W6

http://groups.google.com/group/2-meter-wspr
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Have them in circles
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This Radio Mobile coverage map for the 5 element 432 MHz Yagi at 17 feet at station KP4MD near Sacramento, California with a fixed 230° bearing shows the 3 dB beam width extending from Santa Rosa to San Jose on the Pacific Coast. The 2000+ foot coastal ranges present a formidable obstacle for this radio circuit. The Northern California VHF/UHF WSPR Study Group tested these paths on 432.301500 MHz from Tuesday night through Wednesday 18 DEC 2013.
Results - The Propagation map shows 432 MHz WSPR contacts achieved over the Pacific Coast ranges with 50 watts transmitter power.
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Interpreting WSPR Data for Other Communication Modes 

Using the Weak Signal Propagation Reporter Network to Estimate Suitability of Radio Propagation Conditions for other Communication Modes
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Robert Adlington's profile photoCarol F. Milazzo's profile photo
 
I am a sad nerd lol. I sit on front my PC at work watching my WSPR received signal reports!
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Here are a few points to consider in resolving the issue of ARISS voice 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_Os1LmNMTjNZETYmyPJy0liipFm0?feat=directlink
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
KP4MD/6
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Worldwide 2 meter WSPR activity on 144.4905 MHz has increased over 100 fold in the last 6 months, with operations currently primarily in North America, Europe and Australia.  This has increased the potential for mutual interference with ARISS voice schedules which use an uplink frequency of 144.49 MHz in IARU Regions 2 and 3.  ARISS uses 145.20 MHz for the voice uplink in Region 1.

A recent example for potential interference was the recent six minute ARISS voice contact with the Sunset Hills Elementary School in Poway, California at 1724 UTC on 20 September, 2012.  No interference is observed during this video recording of the event at http://www.ustream.tv/recorded/25558153  The 2 meter WSPR database also recorded that no WSPR network stations in the DM grid square area were transmitting at that time until 1730 UTC at the end of the ISS pass.  

AMSAT is interested in this matter, and Frank Bauer, KA3HDO, has related the difficulty with which ARISS coordinated its current frequencies:

"It took a lot of coordination over many years to get SAREX, now ARISS, on a consistent band plan.  I have been doing frequency coordination for ARISS and SAREX since 1991.  It was very painful to get this coordinated internationally.  Especially within Regions 1 and 2. I think you know that ARISS can’t use 145.20 in Region 2. 
 
The big issue we (ARISS) have on 2 meters is that we need the transmit and receive frequencies to be split on voice.  And they will need to be separated beyond the OSCAR weak signal subband (145.8-146).  This would not have been an issue if the second OSCAR subband (around 144.3-144.5) was still in place.  But that was reallocated to other domains."

Since the ARISS voice schedules are infrequent and announced in advance, I believe it prudent and feasible for 2 meter WSPR stations in IARU Regions 2 and 3 to avoid transmitting during the rare ISS passes over their area with scheduled ARISS voice operations pending other resolution of this frequency coordination matter between WSPRnet and AMSAT.
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09 Oct 2012 - New West Coast 2 meter WSPR DX record - 672 km W7PUA to WA6M
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Have them in circles
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A Google+ page devoted to amateur radio operators who utilize the WSPR mode and anyone interested in very low powered (QRP) experimental radio transmission.