Maybe they should be "grounded"! ... hahahaSorry I couldn't resist !!!!Argiris [SV1TBV] -------- Original message --------From: Kevin Schuchmann via AMSAT-BB [email protected] Date: 9/20/24 5:41 PM (GMT+02:00) To: amsat bb [email protected] Subject: [AMSAT-BB] Re: Newer Starlink satellites are very "bright" at RF vexing radio astronomers I think that is a little harsh. When the first batches went up they were quite bright in the night sky and Starlink modified them with non reflective coatings and visors to reduce their brightness.I'm pretty sure Starlink will try and reduce their unintended RF radiation also, time will tell.KevinHide original messageOn Thursday, September 19th, 2024 at 10:27 PM, Bernd Peters via AMSAT-BB [email protected] wrote:Those satellites are built by a for-profit organization. They want to make money by providing internet services, they don't care about science or scientific research.73,Bernd - KB7AKOn Thu, Sep 19, 2024 at 8:58 PM Jon via AMSAT-BB [email protected] wrote:Then that is potentially rectifiable.Hope future satellites will be better off so that Radio Astronomy does not suffer.73VU2JO

On Thursday, September 19th, 2024 at 10:27 PM, Bernd Peters via AMSAT-BB [email protected] wrote:

Those satellites are built by a for-profit organization. They want to make money by providing internet services, they don't care about science or scientific research.73,Bernd - KB7AKOn Thu, Sep 19, 2024 at 8:58 PM Jon via AMSAT-BB [email protected] wrote:Then that is potentially rectifiable.Hope future satellites will be better off so that Radio Astronomy does not suffer.73VU2JOOn Fri, Sep 20, 2024 at 8:17 AM Wdwhalen via AMSAT-BB [email protected] wrote:Just some ideas based on time in the industry building satellites would be poor quality enclosures on the satellite, lack of filter pins on external cables, general poor workmanship or tolerances on electrical unit boxes meant to create faraday cages.Poorly manufactured or designed power supplies. Emissions from the phased arrays themselves that may have poor grounding or lack conformal coatings due to cost reductions. Lots of options to cause it. Bummer for the radio astronomers - that will be tough to work around for the foreseeable future. Bill - KI6IRZOn Sep 19, 2024, at 6:59 PM, Doug Person via AMSAT-BB [email protected] wrote:

Sounds really bad. Doug -- K0DXV

On 9/19/2024 6:15 PM, Jon via AMSAT-BB wrote:

Any idea how such broadband emissions come from a satellite?

73

Jon, VU2JO

On Fri, Sep 20, 2024 at 1:49 AM Joe Fitzgerald via AMSAT-BB [email protected] wrote:

While newer Starlink spacecraft have been modified to be less bright at visible wavelengths, the new generation is very bright in the RF wavelengths. See this article just published:

https://www.aanda.org/articles/aa/full_html/2024/09/aa51856-24/aa51856-24.ht...

de KM1P

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