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Listener Forum / Pi high noise floor
« Last post by noraatorium on November 11, 2023, 08:48:10 AM »

I am fighting with a high noise floor on the Pi which is about 40dbi higher vs when the same gear is plugged into a computer next to the Pi.
I get the high noise floor even with an antenna unplugged and gain set to nothing.
Tried different Pis, power supplies, rtlsdr dongles, antennas, grounding the Pi. I assume the Pi is hyper-sensitive to interference but is there a way to prevent that?
Encasing it in a metal box?

(Thank you William Hoffman)

I had posted a similar article topic back in March, heard back from quite a few folks.
With the recent events, came across this article on it from Monday.(same author)

By William Hoffman
Special to The Seattle Times
Off-duty pilot Joseph David Emerson’s reported attempt to hinder the engines on a San Francisco-bound flight amid what is thought to be a mental health-related episode filled the news. But while the story is compelling, we as clinicians taking care of pilots see rare events like these as a symptom of the broader issue pilots face related to mental health. It leaves many asking how we can do better — here’s how. 

Airline pilots are required to meet medical standards to fly. If they disclose new health information during their required periodic health assessments, they run the risk — usually temporary — of loss of their ability to work and fly. When it comes to a pilot struggling with mental health, this paradigm can inadvertently leave pilots weighing the benefits of seeking care against the risks to their career. While most pilots can return to duty, the system may inadvertently encourage some pilots to delay care until the symptoms become unmanageable alone.

For these reasons, some have argued that pilots face a barrier to seeking health care. The data speaks to this observation. In our recent study of 3,765 U.S. pilots, 56.1% reported a history of health care-avoidance behavior, including not disclosing health information during aeromedical screening or avoiding care when they felt it was needed. A follow-up study found similar rates in U.S. and Canadian pilots. 

While pilot medical standards will likely always exist in some form, there are multiple ways to address the barriers pilots face in seeking care. First, the resources and services U.S. airline pilots have access to are often highly variable when it comes to mental health. For example, a senior pilot at a major U.S. airline facing a life stressor may have access to different tools compared to a junior pilot flying for a small company. Availability of effective programs like peer support, employee assistance and other wellness programs differ based on the presence of a union, the employer and where pilots fly. Airline pilots in Europe are required by law to have access to peer support services, but such rules do not yet exist here. Further, disability programs for pilots who need to step away from flying for mental health reasons are variable. In fact, the largest pilot union in the U.S. places specific limits on disability payments for pilots who aren’t working because of their mental health.

Some pilots do not have such a disability safety net at all, leaving them without pay while working to regain their certificate. Further, the tests often required to regain certification related to mental health are often not covered by insurance.

Longer-term, we should study ways to transition from our clinical approach to mental health in aviation — one focused on diagnoses and use of services as a marker for risk — to one focused on performance. Regardless of what is listed in the medical record related to mental health, can the pilot perform their duties when it’s time to fly? Using a clinical information as a marker for aviation risk is fraught with limitations. Reasons range from variability between health care provider documentation and diagnostic practices, to health care access. Further complicating the picture is — outside of the extremes — the fact it is not entirely certain whether a pilot with a mental health diagnosis is unfit to fly most of the time and in most circumstances.

Certainly, pilots with a severe mental health condition should not be flying. Instead, we are interested in figuring out how we might help pilots with mild symptoms — perhaps facing one of life’s common stressors — get support when needed to prevent the symptoms from worsening. In a performance-based approach, objectives tools measuring biometric data like sleep patterns or cognitive testing measuring working memory aim to help a pilot inform their preflight health assessment. How such an approach might be implemented is an open research question that leaders should prioritize. While questions remain, there are many opportunities to address this problem to further support aviation’s exceptional safety record — all stakeholders stand to gain. 

William Hoffman is a neurologist and affiliated assistant professor of aviation at the University of North Dakota John D. Odegard School of Aerospace Science with an interest in air crew brain health and pilot health care behavior.
Aviation Accidents/Incidents / Re: First Officer Pulls Gun on Captain
« Last post by tyketto on November 08, 2023, 06:19:42 PM »
Any ATC audio would be hard to find anyway since the only information about this flight is that it happened over the US and that it appears to have been a Delta flight.  No mention of the time it happened and where in the route it happened.  I don't think it's clear if they even diverted or not.

One could guess that since this is happening in a court in Utah, that they have jurisdiction.. That said, that puts a Delta flight in Utah, so one could assume KSLC from that..

"loss of 5, gain of 10" on both approaches - airspeed lost 5 knots and gained 10 knots during the approaches, so probably mandatory go-arounds for wind shear and an unstable approach.
Thanks for your effort KB4TEZ

how in the world????

A plane took off from Stansted Airport with missing windows due to damage caused by high-powered lights during a filming event.

The Air Accidents Investigation Branch (AAIB) said the Airbus A321 jet, previously used by the Government, returned to the Essex airport after a crew member discovered the issue early in the flight last month.

It warned the incident could have resulted in “more serious consequences”.

An inspection revealed two cabin windowpanes were missing and two others were out of position.

For the missing windowpanes, the only object filling the space was the scratch pane, which is a cosmetic piece of plastic designed to prevent passengers touching the outer panes.

 The aircraft was operated by Titan Airways and used by TCS World Travel, a US-based luxury holiday company.

The incident happened a day after it was used for filming on the ground, when powerful lights were set up close to the plane to “give the illusion of a sunrise”, the AAIB said in a preliminary report.

They shone on the right side of the aircraft for around five-and-a-half hours, before being moved to the left side for four hours.

The AAIB said the lights were designed to be deployed no closer than 10 metres from the object being illuminated, but they were between six metres and nine metres from the damaged windows.

It did not disclose what the filming event was for.

The plane took off for the positioning flight to Orlando, Florida, on 4 October with 11 crew and nine passengers, who were all employees of the tour or aircraft operator, the report said.

The passengers sat together in the middle of the plane.

After take-off and the seatbelt signs being switched off, a crew member walked towards the back of the aircraft and spotted that the seal around one of the windows was “flapping”, the AAIB said. He reported this to the crew who decided the plane should return to Stansted, where it landed safely.

It reached an altitude of 14,500 feet during the flight.

The AAIB said “the cabin had remained pressurised normally”.

An examination of the area around the missing or damaged windows found foam used to hold them in place had either melted due to high temperatures or was missing.  In conclusion, the report said: “Whereas in this case the damage became apparent at around FL100 (10,000 feet) and the flight was concluded uneventfully, a different level of damage by the same means might have resulted in more serious consequences, especially if window integrity was lost at higher differential pressure.”

Titan Airways and TCS World Travel have been approached for comment.
news feed courtesy of

United #UA4295 to Colorado Springs declared an emergency and returned to Denver

Found this very interesting, short commute flight from KDEN to KCOS, and it didn't go well.
Not one, but two go arounds.
Then as opposed to trying a third time, diverts back to Denver declaring a fuel emergency.

Was able to grab most of the audio, but some conversation pieces missing (due to the scanner/berry set up at both sites)

Would love to hear anyones thoughts on this one.

John W
Aviation Accidents/Incidents / Re: First Officer Pulls Gun on Captain
« Last post by RonR on November 07, 2023, 08:09:31 AM »
Any ATC audio would be hard to find anyway since the only information about this flight is that it happened over the US and that it appears to have been a Delta flight.  No mention of the time it happened and where in the route it happened.  I don't think it's clear if they even diverted or not.
Aviation Accidents/Incidents / Re: First Officer Pulls Gun on Captain
« Last post by KB4TEZ on November 07, 2023, 07:53:17 AM »
Probably only cockpit recorder only, so I'm sure that's not gonna come out.
(maybe after the court case is done)

Aviation Audio Clips / JetBlue airplane collides with tug vehicle at SFO tarmac
« Last post by KB4TEZ on November 07, 2023, 06:07:51 AM »

here's the audio.

A JetBlue airplane collided with a pushback tractor, or tug vehicle, on the SFO tarmac Monday.

The incident happened around 4 p.m.

SFO officials said the plane, bound for Boston, had just left the gate when the tug vehicle struck one of the plane's engines, damaging it.

Tug vehicles are used to pull airplanes out of the gate to prepare for takeoff.

The plane taxied back to the gate where the passengers were unloaded.

No one was hurt.
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