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ARRL and TAPR 36th DCC 2017

General notes:

Copies of the papers presented at, or published for DCC are available in various ways. A paper printed in the proceedings will be available for purchase in most cases in hard copy as the DCC proceedings. It will in most cases also be available as an individual paper in PDF format as a free download via a link below the abstract (where available) It may also be available on CD-ROM. A paper printed in the proceedings may not have been presented at the conference. Also a presentation at DCC may not be in the printed proceedings. In those cases it may be available on DVD, CD-ROM or as a MP3 download. Links to what is available will be on the page specific to the particular year's DCC.

Printed copies are available at lulu.com. 36th.gif The price for the TAPR and ARRL 36th Digital Communications Conference 2017 Proceedings is:

    $ 20 US +applicable shipping/handling.
(Place Web Order) (This link takes you to lulu.com)

St Louis, MO

Steve Bible, N7HPR, Conference Manager

Local Hosts Mel Whitten, K0PFX

36th ARRL and TAPR Digital Communications Conference
September 15-17, 2017

DCC2017-HamSCI-W2NAF-et-al.pdf HamSCI and the 2017 Total Solar Eclipse
N.A. Frissell, W2NAF
J.S. Vega, WB2JSV
J.D. Katz, KD2JAO
S.W. Gunning, K2AEM
A.J. Gerrard, KD2MCQ
M.L. Moses, KM4EGE
G.D. Earle, W4GDE
J.D. Huba
M. Hirsch, W2NRL
H.W. Silver, N0AX
S.E. Reyer, WA9VNJ
J.R. Ackermann, N8UR
M.D. Suhar, W8RKO
D. Bern, W2LNX
Abstract: On 21 August 2017, a total solar eclipse will cause the shadow of the moon to traverse the United States from Oregon to South Carolina in just over 90 minutes. The sudden absence of sunlight due to the eclipse, especially solar UV and x-rays, provides an impulse function to the upper atmosphere that modifies the neutral dynamics, plasma concentrations, and related properties. In spite of more than 60 years of research, open questions remain regarding eclipse-induced ionospheric impacts. Ham radio operators. advanced technical skills and inherent interest in ionospheric science make the amateur radio community ideal for contributing to and and participating in large-scale ionospheric sounding experiments. This paper describes the Solar Eclipse QSO Party (SEQP), the HF Wideband Recording Experiment, and the Eclipse Frequency Measurement Test (FMT), three amateur radio experiments designed to study the 2017 total solar eclipse. These experiments are coordinated by HamSCI, the Ham radio Science Citizen Investigation, a citizen science organization that connects the amateur radio community to the professional space science research community for mutual benefit.

Keywords: HamSCI, eclipse, SEQP, ionosphere

Proceedings Paper     PowerPoint Presentation

Raspberry Pi 9600 Baud TNC (TNC-Pi9k)
by Mark Griffith, KD0QYN
Abstract: A new TNC has been developed by John Wiseman, G8BPQ, for the Raspberry Pi. Using the same form factor as the Pi and the existing TNC-Pi2, also developed by John, a new device was made that gives the Raspberry Pi and any packet applications that run on the Raspberry Pi operating systems, the capability to transfer data at new higher speeds, while still being affordable for most hams. This paper discusses the hardware and software issues of this new device as well as presenting detailed data on high speed (for amateur radio) data transfer tests.

Keywords: TNC, Raspberry Pi, 9600

Proceedings Paper     PowerPoint Presentation

The H.A.R.C. Database and Visualization Utilities
Joshua D. Katz, KD2JAO
Dr. Nathaniel Frissell,W2NAF
Abstract: HamSCI.s goal is to construct a symbiotic relationship between the formal research community and the Amateur Radio community. To facilitate this transfer of knowledge HamSCI must pioneer technologies that allow scientists to easily obtain and understand Amateur Radio data. This task necessitates the creation of warehousing and visualization facilities that allow scientists to easily understand and make use of our data sets. We are currently testing a database and visualization toolkit designed to handle our existing 2 billion-record long QSO log. This data set represents a compiled version of data gathered by the Reverse Beacon Network, WSPRNet, and PSKReporter. Our goal is to build a robust, fast, and queryable front end to the massive, and currently underutilized, data sources created by Amateur Radio operators.

Keywords: Database, HamSCI, Contest Logs

Proceedings Paper     PowerPoint Presentation

Development and Design of Firmware Programming Tools
by Dave Larsen, KV0S
Abstract: Over the past 10 years, the High Performance Software Designed Radio project has moved from the early attempt of producing an audio interface and a USB interface to a sophisticated single board single FPGA (Field Programmable Gate Array). In this process, the communication protocol and the software tools to manage that process have changed several times. Some of the reason things are organized in certain ways are an artifact of the history of the changes. This paper will chronical these changes and some of the resulting software that allow the loading and replacement of the firmware in the radio boards.

Keywords: FPGA, openHPSDR, firmware, software

Proceedings Paper     PowerPoint Presentation

Ground Based DVB-S2 Repeater for GEO Satellites
by Wallace A. Ritchie WU1Y
Abstract: In 2018 Es.Hail-2, the first satellite to provide Amateur Radio Service from Geostationary Orbit will be launched from Florida. The satellite.s narrowband and wideband transponders will cover about 1/3 of the globe. Most two-way amateur to amateur communication will take place through the satellite.s narrowband linear transponder. This paper explores means to expoit the satellite.s wideband transponder to provide two-way digital voice communications with the aid of a DVB-S2 repeater located at a relatively large earth station on the ground. This mode could provide digital voice and data service between modestly equipped stations while paving the way for the digital satellite based repeaters that are planned for future AMSAT satellites. KW = DVB-S2. Repeater, Satellite

Keywords: DVB-S2. Repeater, Satellite

Proceedings Paper    PowerPoint Presentation

Modulation . Demodulation Software Radio
by Alex Schwarz, VE7DXW
Abstract: Build your own local Space Weather Station with the Scanning RF-Seismograph V1.6 (Solar Eclipse ed.)

Keywords: RF-Seismograph, Background noise

Proceedings Paper    PowerPoint Presentation

Developing a Solar Eclipse Simulation for Greater Good
Joshua S. Vega, WB2JSV
Dr. Nathaniel A. Frissell, W2NAF
Joshua D. Katz, KD2JAO
Dr. Joseph D. Huba
Abstract: This paper presents our methodology for simulating the upcoming total solar eclipse that will be taking place on August 21, 2017. By taking advantage of a high-performance distributed computing cluster as well as a number of third-party scientific computing libraries we were able to efficiently simulate a large number of HF amateur radio contacts before, during, and after the upcoming eclipse. The data generated from the simulations allows us to peek into how the amateur radio community and radio propagation as a whole will be affected in preparation for the actual eclipse. Keywords: eclipse, ionosphere, propagation, simulation

Keywords:eclipse, ionosphere, propagation, simulation

Proceedings Paper    PowerPoint Presentation

Tracking Wildlife with Software Defined Radio in the VHF Band
by Dave Witten, KD0EAG
Abstract: Recent work in many fields involves use of technologies of interest to or popularized by radio amateurs. The low-cost, light weight, and low power demands of simple Software Defined Radios (SDRs) in particular have led to new capabilities in many fields. When combined with the processing power of small development boards such as Raspberry Pi and Arduino and the platform mobility provided by relatively affordable Unmanned Aerial Vehicles (UAVs) new areas of application appear. This paper discusses the recent testing of a system intended to assist the tracking of invasive carp species in the Mississippi river. It may also have potential for use in the 144 MHz band (or elsewhere) for .fox hunting., tracking sources of interference, and similar purposes. Keywords: Tracking, UAV, RTL-SDR

Keywords: Tracking, UAV, RTL-SDR

Proceedings Paper    PowerPoint Presentation

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