Public Reports and Presentations
[February 8, 2019]
Geographically-spaced Synchronized Signal Detection System, by Skip Crilly, New Hampshire Astronomical Society, February 8, 2019.
Abstract: Radio Frequency Interference (RFI) is a confounding problem in radio SETI, as false positives are introduced into receiver signals. Various methods exist to attempt to excise suspected RFI, with a possibility that true positives are rejected, and that un-excised RFI remain as false positives. Uncertain far side-lobe antenna patterns add to the uncertainty. To ameliorate the RFI problem, a system having geographically-spaced simultaneous and synchronized reception has been implemented. A radio telescope at the Green Bank Observatory in Green Bank, West Virginia has been combined with a radio telescope of the Deep Space Exploration Society, near Haswell, Colorado to implement a spatial filter having a thrice-Moon-distance transmitter rejection. Approximately 135 hours of simultaneous synchronized pulse observations have been captured from November 2017 through February 2019. This presentation describes the problem, observation system, observed results and a proposedhypothesis to be subjected to attempts at refutation through further experimentation and RFI and ETI transmitter signal model development.
DSES President Dr. Richard Russel has been measuring signal strengths 0f stations in the Very Low Frequency (VLF) band for the past year, looking for changes in ionospheric propagation due to solar flares. He uses a Sudden Ionospheric Disturbance (SID) monitor small radio telescope. His SID detector is located in Colorado Springs, CO. The measurements are sensitive to the changes in radio propagation at sunrise and sunset.
With his baseline of historical data at sunrise and sunset, he then predicted what could be expected during the August 20, 2017 solar eclipse. He presented his prediction work at the 2017 Society of Amateur Radio Astronomers Annual Conference at NRAO Greenbank, WV on July 25, 2017. His paper was titled, “Ionospheric Reflection Variation During Sunrise and Sunset and Predictions for the 2017 Total Eclipse”.
During the eclipse he made measurements, and found the results matched closely with his predictions. The link presents a summary of his work. Plus it has YouTube links to this and another of his talks at the SARA conference. The second talk is titled, “The Use of Monte-Carlo Analysis to Evaluate Radio Astronomy Source Detection”.
[July 27 – 30, 2017]
Ray Uberbecken presented “Using High Power FM stations to Monitor Meteor Activity Utilizing the 19-kHz Pilot Carrier” at the 2017 Central States VHF Society Conference in Albuquerque, NM. Conference (Dates: July 27 – 30, 2017). Ray’s topic is about an original engineering design and technique he developed for meteor scatter, This approach can replace using broadcast analog TV signals, most of which now are gone.
[ April 2017]
Society of Amateur Radio Astronomers Western Conference 2017 DSES Presentation and VLA Tour. Presenters: Dr. Richard Russel, President, Bill Miller, Secretary, Dave Molter, Board Member, Glenn Davis, Member:
- “Efficiency Analysis of the Plishner Radio Astronomy and Science Center Solar Power Systems”, by Bill Miller.
- “Plishner Radio Astronomy and Space Science Center 60-Foot Dish Position Indication System Development”, by David Molter, Glenn Davis, and Richard Russel.
- “The Use of Statistical Process Control to Improve the Detection of Extraterrestrial Radio Sources”, by Richard Russel.
[ December 2016]
Deep Space Exploration Society 2016 Highlights
- Geographically-spaced Synchronized Signal Detection System, by Skip Crilly, New Hampshire Astronomical Society, February 8, 2019.
- Milky Way Rotation Rate and Mass Estimation Using HI Measurements, by R. Russel, Radio Astronomy, NovemberDecember 2018, pp.77-83, radio-astronomy.org
- Dark H1 Cloud Observation using the Deep Space Exploration Society 18-Meter Dish with the RASDR4, by T. Bigbee, R. Russel, S. Plock, Radio Astronomy, September – October 2018, pp. 64-76, radio-astronomy.org
- SpectraCyber Neutral Hydrogen Measurements using the Deep Space Exploration Society 60-foot Antenna System, R. Russel, G. Agranat, Radio Astronomy, September – October 2018, pp. 58-63, radio-astronomy.org
- Geographically-spaced Synchronized Signal Detection System, by Skip Crilly, SARA Annual Conference – June 10-13, 2018, Greenbank Observatory, West Virginia.
- Abstract: A system has been designed and implemented that makes simultaneous geographically spaced time-and-frequency-synchronized measurements of hypothetical extraterrestrial narrowband signals in the 1405-1448 MHz band. One radio telescope is the Deep Space Exploration Society sixty foot Plishner Telescope in Haswell, Colorado, and another radio telescope is the Forty Foot Telescope at the Green Bank Observatory in Green Bank, West Virginia. A GPS signal-locked reference oscillator and a digital back-end is used at each site to permit differential Doppler measurements of radio pulses to a resolution of 3.73 Hz. This presentation will describe signal search strategy, the receiver system, observations of simultaneous close-frequency pulses, and future plans to enhance capabilities of the system.
- Galactic Navigation Position Data Using Interstellar Medium HI Velocity Measurements, Dr. Richard Russel. SARA Annual Conference – June 10-13, 2018, Greenbank Observatory, West Virginia.
- Abstract: This paper explores the use of HI Doppler measurements as an aid to galactic navigation. Historic HI measurements of the Milky Way are used to determine the galactic rotation rate. The location of the interstellar medium producing the HI signals can then be calculated. Knowing the location of the HI signals, the HI frequency corrections can be made for a spacecraft moving between two points in the galaxy. This data can then be used to supplement optical, pulsar and other galactic navigational aids.
- Earth’s Orbital Position Using Galactic HI Interstellar Medium Velocity Measurements, Dr. Richard Russel. SARA Annual Conference – June 10-13, 2018, Greenbank Observatory, West Virginia.
- The use if neutral hydrogen (HI) velocity measurements have been used to map the rotation rate of the Sun around the center of the Milky Way. By mapping the location of the HI interstellar medium (ISM) clouds, the predicted received velocity can be obtained at any point in the galaxy. This enables the use of the HI ISM velocity measurements to be used to determine the position of the HI receiver. The position of the Earth in the Milky Way can therefore be mapped using the HI measurements. The Earth’s orbital path around the Sun can therefore be tracked over time. This orbital geometry includes the Doppler corrections for the Earth’s rotation and orbital path around the Sun as well as the rotational velocity of the Sun and HI ISM sources.
Deep Space Exploration Society Paper Abstracts__ 2017-2018
– This is a Word document with abstracts of papers given at the Society of Amateur Radio Astronomers Annual Conferences, from 2017 through early 2018.
Earlier versions of the above papers:
- Galactic Navigation Position Data Using Interstellar Medium HI Velocity Measurements, Dr. Richard Russel. SARA Western Conference – March 23-25, 2018, Stanford University, Palo Alto, CA.
- Geographically-spaced Synchronized Signal Detection System, by Skip Crilly, SARA Western Conference – March 23-25, 2018, Stanford University, Palo Alto, CA.
Last updated February 13, 2019 (GCA)