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Re: Solar 11 March 2025 (Dark Sky Observatory)
Thank you for the diagrams, Huub!
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The free-space modeling result is quite reminiscent of the HB9CV antenna, with its pronounced null point on the back of the radiation pattern. This becomes significantly less apparent when setting up the antenna at a height of approximately 4 meters, as recommended by the RJ team for the dual dipole. However, the vertical pattern is then quite well adapted to the task.
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Sabine
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Re: Solar 11 March 2025 (Dark Sky Observatory)
Hi Sabine,
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Given the pattern that Huub mentioned (thanks Huub!), the work involved in tilting the Moxon may not be worth it. On the other hand, one or three of these -- or something similar -- might do the trick without too much hassle: Use that with a short piece of straight tube to mount the Moxon at an angle. Or two pieces if the swivel doesn't lock. -- Dave On 3/17/25 13:52, Sabine Cremer wrote:
On Fri, Mar 14, 2025 at 08:59 AM, Dave Typinski wrote: |
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Introducing Radio JOVE 2.1 - a radio spectrograph system using the SDRplay RSP1B model receiver
¿ªÔÆÌåÓýDear Radio JOVE Enthusiast, ? The Radio JOVE Project announces Radio JOVE 2.1, a radio spectrograph system using the SDRplay RSP1B model receiver because the model RSP1A receiver is no longer available. This is an update to the 16-24 MHz radio spectrograph used to observe solar, Jupiter, Galactic, and Earth-based radio emissions. ? An Introduction to RJ 2.1:? The new RJ 2.1 manuals:? ? We will continue to support both hardware and software for those participants using the RJ 2.0 system as well as those using the original RJ1.1 receivers (and calibrators). If you have a working RJ 2.0 or RJ 1.1 system, no change in hardware or software is required. We welcome your contributions to our listserv and data archive. ? The reason for the update from Radio JOVE 2.0 to 2.1 is that the SDRplay SDR radio receiver model RSP1A is no longer available and is replaced by the model RSP1B, and this also requires a change in the intermediary software. The Radio-Sky Spectrograph (RSS) software is still the standard Radio JOVE recording and analysis software; however, intermediary software is required to convert the data from the radio to the preferred radio astronomy frequency-time display in RSS. The older SDRplay2RSS intermediary software for RJ 2.0 only works with the RSP1A radio (and older RSP2 models). The newer intermediary software for RJ 2.1, called SDR Console and SDRc2RSS, works with the RSP1B radio but is versatile enough to work with many SDR radios. ? Thank you for all that you do for Radio JOVE! ? Best regards, ? The Radio JOVE Team ? ? Chuck Higgins The Radio JOVE Project Middle Tennessee State University 1301 E. Main St., MTSU Box 412 Murfreesboro, TN ?37132 ? |
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Re: Solar 11 March 2025 (Dark Sky Observatory)
On Fri, Mar 14, 2025 at 08:59 AM, Dave Typinski wrote:
In that picture, it looks like your Moxon's beam is aimed at the horizon. Would it work better aimed at Jupiter's transit elevation? That would be a good idea. I just don't know how to adjust the mast mount so I can tilt the antenna.
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Sabine
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Re: Solar 11 March 2025 (Dark Sky Observatory)
On Thu, Mar 13, 2025 at 08:16 PM, Richard Gray wrote:
The antenna looks so professional because it is. It's a UK-made antenna from InnovAntennas.
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When I had it set up, I said to my neighbor Ruth with a lump in my throat: "That thing looks pretty ugly, doesn't it?" But she just laughed and said she thought it was great that I was doing such amazing things like radio astronomy, and that the antenna alone looked absolutely impressive.
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Ruth is a really great and nice woman.
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Sabine
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Re: 14 Mar 2025 Airglow and TPs
Hi Mark,
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TPs are teepees, named as such because in a spectrogram they resemble a Native American teepee. They're the result of the changing ionization state of the F layer(s) affecting the propagation of terrestrial HF band emission. Slides 15 to 23 here: ,%20Typinski%20(2017)%20Slides%20and%20Notes.pdf Here's a paper about the phenomenon: -- Dave On 3/16/25 12:48, Frederick Lehr via groups.io wrote:
On Sat, Mar 15, 2025 at 10:11 AM, Sabine Cremer wrote: |
salvador aguirre
Sabine Cremer
Dave Typinski
Chuck Higgins
