Re: Topband: Solar eclipse and 160m propagation.
Bob, For your constituents who plan to operate the Eclipse event as a QSO party (August QST, pg 94, Ward Silver), N1MM+ has a contest definition in its >File >New Log in Database... dialog window. Select "eclipse." -larry (K8UT) -Original Message- From: Robert McGwier Sent: Friday, July 14, 2017 11:21 PM To: Tom Frenaye ; topband Subject: Re: Topband: Solar eclipse and 160m propagation. Virginia Tech, New Jersey Institute of Techology and others are putting teams into field to do measurements of several sorts during the eclipse. A student of mine is building low power, inexpensive ionosondes to measure the height of the F layer using radar pulses on HF and measuring the round trip time in the 3-6 MHz region before during and after the eclipse from the West coast to the East coast along the path of totality. A student of mine designed an SDR to measure scintillation on satellite signals as it passes through the ionosphere before, during, and after the eclipse. This was her master's thesis. She just graduated and was a recipient of "Future Leadership" position with Northrup Grumman. Most of the students involved at VT are members of the VT amateur radio association (K4KDJ). Current and former students of VT were the genesis of HAMSCI. They reached out to Ward Silver and Dave Pascoe who met with the students and me at Dayton two years ago and here we are. Dr Nathaniel Frissell, W2NAF and Magda Moses KM4EGE were both members of VTARA which I am honored to serve as faculty adviser. Nathaniel has moved on to NJIT and is taking RBN data during the Solar Eclipse QSO Party to try and observe shifting propagation. HAMSCI.org is something we hope leads to lots of "citizen science" by hand. Our science investigator is Dr Greg Earle, w4gde and he and this activity are supported by the national science foundation. I'm playing SDR and radio consultant to the VT team. 73s Bob N4HY On Wed, Jul 5, 2017 at 8:17 AM Tom Frenaye wrote: At 06:48 AM 7/5/2017, CT1EKD wrote: >Hi Topbanders >In 21th August we will have a solar eclipse... Do you know any >studies about propagation at eclipses, before, during and after ? Pedro - Here's a place to start. http://hamsci.org/ -- Tom e-mail: fren...@pcnet.comYCCC --> http://www.yccc.org/ Tom Frenaye, K1KI, P O Box J, West Suffield CT 06093 Phone: 860-668-5444 _ Topband Reflector Archives - http://www.contesting.com/_topband -- Bob McGwier Founder, Federated Wireless, Inc Founder and Technical Advisor, HawkEye 360, Inc Research Professor Virginia Tech Chief Scientist: The Ted and Karyn Hume Center for National Security and Technology Senior Member IEEE, Facebook: N4HYBob, ARS: N4HY Faculty Advisor Virginia Tech Amateur Radio Assn. (K4KDJ) Director of AMSAT Member of PVRC (Roanoke-Blacksburg), TAPR, life member of ARRL and AMSAT, NRVR.ORG (Rocketry) _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Solar eclipse and 160m propagation.
Virginia Tech, New Jersey Institute of Techology and others are putting teams into field to do measurements of several sorts during the eclipse. A student of mine is building low power, inexpensive ionosondes to measure the height of the F layer using radar pulses on HF and measuring the round trip time in the 3-6 MHz region before during and after the eclipse from the West coast to the East coast along the path of totality. A student of mine designed an SDR to measure scintillation on satellite signals as it passes through the ionosphere before, during, and after the eclipse. This was her master's thesis. She just graduated and was a recipient of "Future Leadership" position with Northrup Grumman. Most of the students involved at VT are members of the VT amateur radio association (K4KDJ). Current and former students of VT were the genesis of HAMSCI. They reached out to Ward Silver and Dave Pascoe who met with the students and me at Dayton two years ago and here we are. Dr Nathaniel Frissell, W2NAF and Magda Moses KM4EGE were both members of VTARA which I am honored to serve as faculty adviser. Nathaniel has moved on to NJIT and is taking RBN data during the Solar Eclipse QSO Party to try and observe shifting propagation. HAMSCI.org is something we hope leads to lots of "citizen science" by hand. Our science investigator is Dr Greg Earle, w4gde and he and this activity are supported by the national science foundation. I'm playing SDR and radio consultant to the VT team. 73s Bob N4HY On Wed, Jul 5, 2017 at 8:17 AM Tom Frenaye wrote: > At 06:48 AM 7/5/2017, CT1EKD wrote: > >Hi Topbanders > >In 21th August we will have a solar eclipse... Do you know any > >studies about propagation at eclipses, before, during and after ? > > Pedro - > > Here's a place to start. http://hamsci.org/ > > -- Tom > > > > > e-mail: fren...@pcnet.comYCCC --> http://www.yccc.org/ > Tom Frenaye, K1KI, P O Box J, West Suffield CT 06093 Phone: 860-668-5444 > > _ > Topband Reflector Archives - http://www.contesting.com/_topband > -- Bob McGwier Founder, Federated Wireless, Inc Founder and Technical Advisor, HawkEye 360, Inc Research Professor Virginia Tech Chief Scientist: The Ted and Karyn Hume Center for National Security and Technology Senior Member IEEE, Facebook: N4HYBob, ARS: N4HY Faculty Advisor Virginia Tech Amateur Radio Assn. (K4KDJ) Director of AMSAT Member of PVRC (Roanoke-Blacksburg), TAPR, life member of ARRL and AMSAT, NRVR.ORG (Rocketry) _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Solar eclipse and 160m propagation.
RR thanks for all replies. C U at this weekend contest. Pedro - CT1EKD Citando Bill Liles : Pedro, there are many reports about solar eclipses effects on propagation dating from 1912 on. One of the best is "Radio and the 1999 UK Total Solar Eclipse" by Dr. Ruth Bamford. It can be downloaded from https://arxiv.org/abs/1703.01491 It includes a number of plots of amplitude vs time at 1440 kHz. Bill Liles, NQ6Z _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Solar eclipse and 160m propagation.
Pedro, there are many reports about solar eclipses effects on propagation dating from 1912 on. One of the best is "Radio and the 1999 UK Total Solar Eclipse" by Dr. Ruth Bamford. It can be downloaded from https://arxiv.org/abs/1703.01491 It includes a number of plots of amplitude vs time at 1440 kHz. Bill Liles, NQ6Z _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Solar eclipse and 160m propagation
Read this: http://www.skyandtelescope.com/2017-total-solar-eclipse/how-to-hear-the-solar-eclipse/ Rob K5UJ _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Solar eclipse and 160m propagation
I just did an internet search of "radio propagation during an eclipse" and many pages of research articles came up. Remember, an eclipse is a local event whose path is a narrow swath with a width no more than 160 miles. See, for example, http://www.eclipse2017.org/2017/maps.htm. 73, Jeff KH6O Senior Chief, US Coast Guard (retired) _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Solar eclipse and 160m propagation.
At 06:48 AM 7/5/2017, CT1EKD wrote: >Hi Topbanders >In 21th August we will have a solar eclipse... Do you know any >studies about propagation at eclipses, before, during and after ? Pedro - Here's a place to start. http://hamsci.org/ -- Tom e-mail: fren...@pcnet.comYCCC --> http://www.yccc.org/ Tom Frenaye, K1KI, P O Box J, West Suffield CT 06093 Phone: 860-668-5444 _ Topband Reflector Archives - http://www.contesting.com/_topband
Topband: Solar eclipse and 160m propagation.
Hi Topbanders In 21th August we will have a solar eclipse... Do you know any studies about propagation at eclipses, before, during and after ? Pedro -CT1EKD _ Topband Reflector Archives - http://www.contesting.com/_topband
