开云体育

Dear Radio JOVE Community, The Radio JOVE Project is a NASA Partner citizen science project where participants purchase, assemble, and operate their own 16-24 MHz radio spectrograph to observe solar, Jupiter, Galactic, and Earth-based radio emissions. Learn to become a citizen scientist and contribute scientific-quality data to our data archive. Visit Getting Started to learn how to participate in Radio JOVE. Regards, The Radio JOVE Team

Dera Radio Jove experts. I am a complete newbie in the radio field and have a few stupid questions ... 1. I plan to use a HackRF one with portapack instead of the SDRPlay to receive Radio Jove Signals (https://hackrf.readthedocs.io/en/latest/hackrf_one.html#minimum-detectable-input-power). The HackRFone is more versatile, cheaper and covers a larger Bandwidth, but is it sensitive enough ? 2. Is it a problem if the Wave Impedance between the F connector (75 Ohms) from the Antenna and the SMA connector (50 Ohms) on the HackRF input side vary (25 Ohms differrence) ? What would be the danger ? How to mitigate ? 3. Same for the coaxial cable impedances ? What if I use a coax cable from an old sattellite dish instead of RG-58 cable ? 4. For the Dipole Antenna wire, can I use a ca 2mm diameter insulated loudspeaker copper wire ? 5 Can I set up the 2 Antenna Dipoles in my shed under a metal free roof, made out of teracotta roof tiles (unter Ziegeldach in alten Fachwerkschuppen) ? Or does a ceramic tile roof dampen or create a false (thermal?) radiation itself, which would impair the 20.1 MHZ Jove Signals ? I hope here are Radio Jove Antenna experts who can help me set up a Jove Antenna with HackRF as SDR Receiver, Cheers, Dan.

https://skyandtelescope.org/astronomy-news/newborn-jupiter-was-twice-as-big-as-it-is-today/ -- Hawk's Nest Radio Astronomy Observatory http://hnrao.weebly.com/ Virus-free.www.avast.com

A flare can occur without producing radio bursts and solar radio bursts can occur without there being a flare. You said: A flare can occur without producing radio bursts and solar radio bursts can occur without there being a flare ChatGPT said: Yes, that's correct — and it's an important nuance in solar and space weather physics: 1. A flare can occur without producing radio bursts This happens when the flare's energy is primarily confined to thermal emissions (X-rays, EUV) and doesn’t accelerate enough high-energy electrons to generate detectable radio waves. Reasons include: The flare is weak or compact and doesn't inject electrons into open magnetic field lines. Magnetic confinement or geometry prevents electrons from escaping into the corona or interplanetary space. Instrument sensitivity or interference might obscure faint radio signals. 2. Solar radio bursts can occur without a visible flare This occurs because radio bursts are generated by nonthermal electron populations, which may originate from: Coronal mass ejections (CMEs) without associated flares (especially type II and type IV bursts). Active region dynamics like small-scale reconnection or magnetic restructuring. Noise storms or type I bursts, which are often long-lived and unrelated to discrete flares. Type III bursts from electron beams escaping along open field lines, which may occur without significant soft X-ray flare signatures. In summary: Not all flares produce radio bursts. Not all radio bursts come from flares. Both phenomena trace different aspects of solar magnetic energy release and particle acceleration.