Nature Communications Article Features LO-94, First Lunar-Orbiting Ham Radio Spacecraft A July 9 Nature Communications article, “Design and flight results of the VHF/UHF communication system of Longjiang lunar microsatellites,” describes the Longjiang-2/Lunar-OSCAR 94 (LO-94) spacecraft, which carried the first amateur radio communication system into lunar orbit.
As a part of China’s Chang’e-4 lunar far side mission, two lunar microsatellites for low-frequency radio astronomy, amateur radio, and education — Longjiang-1 and Longjiang-2, were launched as secondary payloads on May 20, 2018, along with the Queqiao L2 relay satellite. Five days later, Longjiang-2 successfully inserted itself into an elliptical lunar orbit of 357 × 13,704 kilometers (221 × 8,496 miles) to become the smallest spacecraft to enter lunar orbit with its own propulsion system. The satellite carried a VHF/UHF SDR, designed for operation with small ground stations.
The article describes and evaluates the design of the VHF/UHF radio and the modes used. Flight results of the VHF/UHF radio are also presented, including operation of the radio, performance analysis of downlink signals, and the first lunar orbit UHF very-long-baseline interferometry (VLBI) experiment.
http://www.packtenna.com Read more
ARRL has announced the winners of the 2018 QST Antenna Design Competition. “Dozens of entries were received, but only three could win,” said... Read more
YAESU DR-2X Features Easy Migration…. The repeater controller, receiver and transmitter are all packaged into a 19” standard cabinet rack mount panel... Read more
SainSonic releases its debut radios – SainSonic RST599 two-way radios. This revolutionary design marks the start of an exciting new produ... Read more
This week, AMSAT News Service (ANS) cited an August 27 report from AMSAT Vice President-Operations Drew Glasbrenner, KO4MA, saying that a digital mobi... Read more
MFJ-566M, $29,95 Red/Black Micro Morse Code Key with aluminum base. Liquid smooth and shielded steel ball bearings. Hardened steel pin rotation and st... Read more
Icom are now able to provide a high quality ATEX approved PTT Headset that is approved to work with the IC-F3202DEX and F4202DEX series of ATEX radios... Read more