[HCARC] Fwd: [Rmg] Transatlantic Contact Completed on 2 Meters!
W4wj at aol.com
W4wj at aol.com
Thu Oct 6 16:34:49 EDT 2016
An interesting FYI...
73
Don
W4WJ
____________________________________
From: n5ba at comcast.net
To: rmg at k5rmg.com
Sent: 10/6/2016 1:16:31 P.M. Central Daylight Time
Subj: [Rmg] Transatlantic Contact Completed on 2 Meters!
>From ARRL Web page
Transatlantic Contact Completed on 2 Meters!
10/05/2016
Amateurs in South America and Africa successfully completed a transatlantic
contact on 2 meters on October 4 and 5. Setting the new record were Marcos
da Silva, PY1MHZ, in Rio de Janeiro (GG87jc), who copied the 2 meter QRA64
signal of Pieter Jacobs, V51PJ, in Rosh Pinah, Namibia (JG82IE) via
tropospheric ducting. The distance between the two stations is 5987 kilometers
(approximately 3712 miles). Developed by Nico Palermo, IV3NWV, QRA64 has
been incorporated into the WSJT digital suite of Joe Taylor, K1JT.
The contact will not qualify for one of the Irish Radio Transmitters
Society (_IRTS_ (http://www.irts.ie/) ) _Brendan Awards_
(http://www.irts.ie/cgi/st.cgi?brendan) , which require that one of the transatlantic endpoints be
in Europe.
The contact took place on 144.250MHz, with PY1MHZ heard at a
signal-to-noise ratio (SNR) of –36 dB, and V51PJ copied at an SNR of –37 dB. The
contact took place from 2038 UTC on October 4 until 0028 on October 5.
PY1MHZ was running 400 W into a 2 × 12 element horizontal array, using a 16
dB preamp on receive. V51PJ was running 1 kW into a 2 × 13 element array.
“Look at those SNRs of –37 and –36 dB!” enthused Ward Silver, N0AX. “That’
s a signal 4000 times weaker than the noise, and it did not take massive
dishes or arrays.” He said the continued progress of digital-mode
development demonstrated by the WSJT suite of protocols “represents true innovation
by amateurs.”
Silver noted that the Brazil-to-Namibia path is 50 percent longer than the
Southern California-to-Hawaii path. He speculates that even longer
transpacific paths may exist, for which no amateur stations are currently
available.
Hans Blondeel Timmerman, PB2T, commented, “Only thanks to the persistence
and determination of these OMs was this historic achievement possible.” He
expressed appreciation to WSJT developer Joe Taylor, K1JT, for continuing
to provide state-of-the-art Amateur Radio digital software.
More information about the HCARC
mailing list