Solar Cycle 25
Above: Layers of the atmosphere. Credit: NASA
by DR.TONY PHILLIPS – spaceweather.com
The sun is entering one of the deepest Solar Minima of the Space Age. Sunspots have been absent for most of 2018, and the sun’s ultraviolet output has sharply dropped. New research shows that Earth’s upper atmosphere is responding.
“We see a cooling trend,” says Martin Mlynczak of NASA’s Langley Research Center. “High above Earth’s surface, near the edge of space, our atmosphere is losing heat energy. If current trends continue, it could soon set a Space Age record for cold.”
These results come from the SABER instrument onboard NASA’s TIMED satellite. SABER monitors infrared emissions from carbon dioxide (CO2) and nitric oxide (NO), two substances that play a key role in the energy balance of air 100 to 300 kilometers above our planet’s surface. By measuring the infrared glow of these molecules, SABER can assess the thermal state of gas at the very top of the atmosphere–a layer researchers call “the thermosphere.”
“The thermosphere always cools off during Solar Minimum. It’s one of the most important ways the solar cycle affects our planet,” explains Mlynczak, who is the associate principal investigator for SABER.
When the thermosphere cools, it shrinks, literally decreasing the radius of Earth’s atmosphere. This shrinkage decreases aerodynamic drag on satellites in low-Earth orbit, extending their lifetimes. That’s the good news. The bad news is, it also delays the natural decay of space junk, resulting in a more cluttered environment around Earth……READ FULL ARTICLE
GIBSON, Pa. — One person is dead after falling while trying to make repairs to a ham radio in Susquehanna County. The coroner tells Newswatch 16 the person was trying to hook up a guy wire when the tower collapsed. Officials ha... Read more
Loop Antennas HF Receive Antenna Type:Shielded Magnetic Loop HF Receive Antenna Remote Mounting Position:Elevated HF Receive Antenna Style:One-pie... Read more
VHF/UHF Log-Periodic Antenna Antenna, LPDA Type, VHF/UHF, 21 Elements, 50-1300 MHz, 500 W, 50 ohms, 6.66 ft. Boom Length, Type N, Female Create CLP-51... Read more
Introduction and Background This is an experimental project that may lead to further development in the future, but even as presented below, it does w... Read more
FR5200H / FR6200H IDAS VHF/UHF Digital Repeaters 50W 100% Duty cycle operation Employing a high performance power amplifier, together with the solid h... Read more
TYT MD-380 UHF 400-480MHZ Digital Radio(DMR) ■Remote kill/stun/activate ■Priority Scan ■Voice Prompt ■Complying with digital protocol ETSI TS10... Read more
Motorola Solutions continues to design digital radio solutions for firefighters and has added the APX 8000XE two-way radio and APX XE500 RSM to its li... Read more