<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><br>No reaction from SpaceX or Elon<br><div dir="ltr"><br><blockquote type="cite">On 23 Jun 2023, at 19:15, Hesham ElBakoury via Starlink <starlink@lists.bufferbloat.net> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><div dir="auto">What was Elon Musk reaction to this research?<div dir="auto"><br></div><div dir="auto">Hesham</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Jun 23, 2023, 9:12 AM David Fernández via Starlink <<a href="mailto:starlink@lists.bufferbloat.net">starlink@lists.bufferbloat.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I think that paper has already been discussed in this list. It<br>
appeared in the news a while ago:<br>
<a href="https://www.theregister.com/2022/10/24/starlink_signal_decoded_for_use" rel="noreferrer noreferrer" target="_blank">https://www.theregister.com/2022/10/24/starlink_signal_decoded_for_use</a><br>
<br>
Regards,<br>
<br>
David<br>
<br>
> Date: Fri, 23 Jun 2023 06:17:08 -0700<br>
> From: Joe Hamelin <<a href="mailto:nethead@gmail.com" target="_blank" rel="noreferrer">nethead@gmail.com</a>><br>
> To: Hesham ElBakoury <<a href="mailto:helbakoury@gmail.com" target="_blank" rel="noreferrer">helbakoury@gmail.com</a>><br>
> Cc: <a href="mailto:starlink@lists.bufferbloat.net" target="_blank" rel="noreferrer">starlink@lists.bufferbloat.net</a><br>
> Subject: Re: [Starlink] Signal Structure of the Starlink Ku-Band<br>
> Downlink<br>
> Message-ID:<br>
> <CAO0-hXar-KaB=p=<a href="mailto:HGeGe39vAKTeG5RHBxSgioccOj%2BR4Nt7yeA@mail.gmail.com" target="_blank" rel="noreferrer">HGeGe39vAKTeG5RHBxSgioccOj+R4Nt7yeA@mail.gmail.com</a>><br>
> Content-Type: text/plain; charset="utf-8"<br>
><br>
> Most interesting:<br>
><br>
> " VIII. CONCLUSIONS We have developed and applied a blind signal<br>
> identification technique to uncover the frequency- and time-domain<br>
> structure of the Starlink Ku-band downlink signal. We further identified<br>
> four synchronization sequences that can be used to *passively exploit*<br>
> Starlink signals for pseudorange-based positioning, navigation, and timing<br>
> (PNT), and explicitly evaluated two of these. The results in this paper<br>
> illuminate the *path to use of Starlink signals as a backup to traditional<br>
> GNSS* for PNT."<br>
><br>
> On Fri, Jun 23, 2023 at 6:09 AM Joe Hamelin <<a href="mailto:nethead@gmail.com" target="_blank" rel="noreferrer">nethead@gmail.com</a>> wrote:<br>
><br>
>><br>
>> <a href="https://radionavlab.ae.utexas.edu/wp-content/uploads/2023/01/starlink_structure.pdf" rel="noreferrer noreferrer" target="_blank">https://radionavlab.ae.utexas.edu/wp-content/uploads/2023/01/starlink_structure.pdf</a><br>
>><br>
>> Here's the PDF.<br>
>><br>
>> On Fri, Jun 23, 2023 at 2:55 AM Hesham ElBakoury via Starlink <<br>
>> <a href="mailto:starlink@lists.bufferbloat.net" target="_blank" rel="noreferrer">starlink@lists.bufferbloat.net</a>> wrote:<br>
>><br>
>>> Has anyone looked at this paper (Signal Structure of the Starlink<br>
>>> Ku-Band Downlink) by Todd E. Humphreys ? This paper will be published in<br>
>>> IEEE Transactions on Aerospace and Electronic Systems. Are there other<br>
>>> research efforts which try to do the same?<br>
>>><br>
>>> Thanks<br>
>>><br>
>>> Hesham<br>
>>><br>
>>><br>
>>> _______________________________________________<br>
>>> Starlink mailing list<br>
>>> <a href="mailto:Starlink@lists.bufferbloat.net" target="_blank" rel="noreferrer">Starlink@lists.bufferbloat.net</a><br>
>>> <a href="https://lists.bufferbloat.net/listinfo/starlink" rel="noreferrer noreferrer" target="_blank">https://lists.bufferbloat.net/listinfo/starlink</a><br>
>>><br>
>><br>
>><br>
>> --<br>
>> --<br>
>> Joe Hamelin, W7COM, Tulalip, WA, 360-474-7474<br>
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</blockquote></div>
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