Uploaded September 2026 | Updated September 2026, 17 hours ago
This presentation covered the technical design and implementation of the Spiral signal for Earth-Venus-Earth (EVE) communication. Beginning with the theoretical foundations of the design drawn up by Pete Wyckoff and the challenges of operating in different frequency bands, it progressed through the Python implementation by Michelle Thompson, and then covered what is required to test the design with an EME station.
The team discussed the need to modify the system for a 1299.5 MHz frequency, required because of the cancellation of @DeepSpaceExplorationSociety 2304 MHz plans. Adjusting for 1299.5 MHz, used by Dwingeloo, Stockert, Effelsberg, and ATA, provides an additional 1.5 dB of capacity. The team reviewed the current Python implementation that works with UHD and Python.
The discussion also covered station construction costs, which have increased to just over $3000. Michelle covered potential participation sites for future EVE attempts.
Moon Tracking System Construction Demo
Paul demonstrated the mechanical construction of a moon tracking system in his garage workshop, showing the Yaesu G5500DC controller with a dish that could rotate in both azimuth and elevation. He identified clearance issues with the current boom arrangement and proposed replacing the horizontal boom with square tubing to resolve mechanical conflicts and improve balance.
EME Satellite Dish Positioning Solutions
The team discussed challenges with their EME dish setup, particularly regarding the offset positioning of the dish and rotator. Oscar proposed solutions including repositioning the elevation rotor and adding counterweights to balance the system. The group agreed that while the current "square" mounting approach was a temporary emergency solution, they would explore Oscar's counterweight and repositioning suggestions in a follow-up meeting to better center the dish's center of gravity with the rotator's axis.
Thank you to everyone making this signal design review a success!
This presentation covered the technical design and implementation of the Spiral signal for Earth-Venus-Earth (EVE) communication. Beginning with the theoretical foundations of the design drawn up by Pete Wyckoff and the challenges of operating in different frequency bands, it progressed through the Python implementation by Michelle Thompson, and then covered what is required to test the design with an EME station.
The team discussed the need to modify the system for a 1299.5 MHz frequency, required because of the cancellation of @DeepSpaceExplorationSociety 2304 MHz plans. Adjusting for 1299.5 MHz, used by Dwingeloo, Stockert, Effelsberg, and ATA, provides an additional 1.5 dB of capacity. The team reviewed the current Python implementation that works with UHD and Python.
The discussion also covered station construction costs, which have increased to just over $3000. Michelle covered potential participation sites for future EVE attempts.
Moon Tracking System Construction Demo
Paul demonstrated the mechanical construction of a moon tracking system in his garage workshop, showing the Yaesu G5500DC controller with a dish that could rotate in both azimuth and elevation. He identified clearance issues with the current boom arrangement and proposed replacing the horizontal boom with square tubing to resolve mechanical conflicts and improve balance.
EME Satellite Dish Positioning Solutions
The team discussed challenges with their EME dish setup, particularly regarding the offset positioning of the dish and rotator. Oscar proposed solutions including repositioning the elevation rotor and adding counterweights to balance the system. The group agreed that while the current "square" mounting approach was a temporary emergency solution, they would explore Oscar's counterweight and repositioning suggestions in a follow-up meeting to better center the dish's center of gravity with the rotator's axis.
Thank you to everyone making this signal design review a success!
