Category: Astronomy

via the ARRL: Simple 40-Meter Dipole Supports Advanced Mars Radar

The venerable HF dipole has found a new home and purpose in space. The Mars advanced radar for subsurface and ionospheric sounding (MARSIS) on Mars Express uses a simple 40-meter dipole as the antenna for its subsurface sounding radar. The dual-channel low-frequency sounder operates between 1.3 and 5.5 MHz for subsurface sounding and between 100 […]

via the ARRL: Amateur Radio Reports: Arecibo Observatory Dish Sustained Serious Damage from Maria

Articles on the National Geographic and Space.com websites report that scientists and Amateur Radio operators have confirmed that Puerto Rico’s Arecibo Observatory came through Hurricane Maria largely intact but “with some significant damage.” Universities Space Research Association (USRA), which helps to operate the Observatory, said it learned via “short wave radio contact” that staff and […]

via the ARRL: HamSCI Presents Initial Eclipse Results at ARRL-TAPR Digital Communications Conference

At the 36th annual ARRL and TAPR Digital Communications Conference (DCC), held September 15–17 this year in St. Louis, HamSCI members presented preliminary evidence that the August 21 solar eclipse had a significant effect on HF propagation. The DCC is geared toward technically minded Amateur Radio operators who specialize in building and designing hardware and […]

The Great American Eclipse: Virginia Tech researcher grapples with a year’s worth of data

Stationed in an empty field at Shaw Air Force Base near Sumter, South Carolina, Virginia Tech electrical engineering professor Greg Earle and his team waited for the total solar eclipse of 2017. Rather than traveling toward the path of totality to see one of “nature’s most awe-inspiring sights,” Earle prepared to put his three-year-old hypothesis […]

via the ARRL: Space Weather Prediction Center Says Solar Phenomena May Continue

The Space Weather Prediction Center (SWPC) said today that G4 (Severe) geomagnetic storm levels were observed at 2350 UTC on September 7 and again at 0151 UTC and 1304 UTC on September 8, due to the effects of a coronal mass ejection (CME). A G3 (Strong) or greater warning was in effect until 1500 UTC […]

via the ARRL: Solar Flares Spark Radio Blackouts, Auroral Displays Possible

NOAA’s Space Weather Prediction Center (SWPC) has issued a strong (G3) geomagnetic storm watch for September 7 through September 9. The SWPC said the watch for September 7 remains in effect due to the arrival of a coronal mass ejection (CME) and the effects of a CME on September 4. “Additionally, a G3 watch is […]

More Professional and Citizen Research Suggests Eclipse Briefly Affected HF Propagation

Both professional and citizen scientists conducted formal and informal investigations into the effect of the August 21 solar eclipse on HF radio propagation. Nathaniel Frissell, W2NAF, of HamSCI, has said it will take some time to get a more scientific analysis of data compiled during the Solar Eclipse QSO Party. Frissell and others are investigating […]

Solar Eclipse QSO Party a Hit, Science Conclusions Await Additional Analysis

The 2017 Solar Eclipse QSO Party (SEQP) is history, and, while logs are still coming in, the preliminary participation numbers look good, according to Nathaniel Frissell, W2NAF, of HamSCI. “Although the final numbers are not yet in, preliminary reports show that over 670,000 spots were detected by the Reverse Beacon Network (RBN), and over 542,000 […]

Solar Eclipse QSO Party Signup So Far Has Attracted More Than 250 Eclipse Enthusiasts

The Solar Eclipse QSO Party (SEQP) now is just a week away — Monday, August 21 — and more than 250 radio amateurs in the US and elsewhere already have signed up to take part. The SEQP is a special operating event organized by the Ham Radio Science Citizen Investigation (HamSCI), led by Nathaniel Frissell, […]

via the ARRL: Amateur Radio Communication Resources to be Available during Eclipse Day

ARRL, the American Red Cross, and The Salvation Army Team Emergency Radio Network (SATERN) will partner on Monday, August 21, to provide a nationwide communication link for local and regional American Red Cross units should a communications failure occur during the solar eclipse. “Concern has been expressed by public safety, emergency management, and others that […]

via HACKADAY: Crowdsourcing The Study Of An Eclipse’s Effect On Radio Propagation

If you are an American, you’ll probably now find yourself in one of three camps. People who are going to see the upcoming solar eclipse that will traverse your continent, people who aren’t going to see the eclipse, and people who wish everyone would just stop going on incessantly about the damn eclipse. Whichever of […]

Will you be able to call 911 during the solar eclipse? Emergency managers prepare for cell towers to jam (Oregon)

When an expected 1 million people converge on Oregon for next month’s solar eclipse — what many call the most dramatic celestial event viewable from Earth — they will be calling, texting, tweeting and posting selfies of their experience to Snapchat and Instagram. Perhaps the only people not smiling at the thought of this solar […]

Arecibo Observatory Ionospheric Heating Campaign Under Way

Arecibo Observatory in Puerto Rico is conducting an ionospheric heating campaign July 24-31, using HF. “The new Arecibo ionosphere HF heater nominally transmits 600 kW net power and has a unique Cassegrain dual-array antenna design that increases gain of three crossed dipoles for each band, using the signature 1000-foot spherical dish reflector,” explained Chris Fallen, […]

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