[Starlink] Signal Structure of the Starlink Ku-Band Downlink

[David Fernández]

This may be a reaction, but not from Elon, of course:

https://www.esa.int/Applications/Navigation/Industry_invited_to_bid_for_low-Earth_orbit_satnav_demo

2023-06-23 18:50 GMT+02:00, contact at olegkutkov.me <contact at olegkutkov.me>:
>
> No reaction from SpaceX or Elon
>
>> On 23 Jun 2023, at 19:15, Hesham ElBakoury via Starlink
>> <starlink at lists.bufferbloat.net> wrote:
>>
>> 
>> What was Elon Musk reaction to this research?
>>
>> Hesham
>>
>> On Fri, Jun 23, 2023, 9:12 AM David Fernández via Starlink
>> <starlink at lists.bufferbloat.net> wrote:
>>>
>>> I think that paper has already been discussed in this list. It
>>> appeared in the news a while ago:
>>> https://www.theregister.com/2022/10/24/starlink_signal_decoded_for_use
>>>
>>> Regards,
>>>
>>> David
>>>
>>> > Date: Fri, 23 Jun 2023 06:17:08 -0700
>>> > From: Joe Hamelin <nethead at gmail.com>
>>> > To: Hesham ElBakoury <helbakoury at gmail.com>
>>> > Cc: starlink at lists.bufferbloat.net
>>> > Subject: Re: [Starlink] Signal Structure of the Starlink Ku-Band
>>> >       Downlink
>>> > Message-ID:
>>> >
>>> >  <CAO0-hXar-KaB=p=HGeGe39vAKTeG5RHBxSgioccOj+R4Nt7yeA at mail.gmail.com>
>>> > Content-Type: text/plain; charset="utf-8"
>>> >
>>> > Most interesting:
>>> >
>>> > " VIII. CONCLUSIONS We have developed and applied a blind signal
>>> > identification technique to uncover the frequency- and time-domain
>>> > structure of the Starlink Ku-band downlink signal. We further
>>> > identified
>>> > four synchronization sequences that can be used to *passively exploit*
>>> > Starlink signals for pseudorange-based positioning, navigation, and
>>> > timing
>>> > (PNT), and explicitly evaluated two of these. The results in this paper
>>> > illuminate the *path to use of Starlink signals as a backup to
>>> > traditional
>>> > GNSS* for PNT."
>>> >
>>> > On Fri, Jun 23, 2023 at 6:09 AM Joe Hamelin <nethead at gmail.com> wrote:
>>> >
>>> >>
>>> >> https://radionavlab.ae.utexas.edu/wp-content/uploads/2023/01/starlink_structure.pdf
>>> >>
>>> >> Here's the PDF.
>>> >>
>>> >> On Fri, Jun 23, 2023 at 2:55 AM Hesham ElBakoury via Starlink <
>>> >> starlink at lists.bufferbloat.net> wrote:
>>> >>
>>> >>> Has anyone looked at this paper (Signal Structure of the Starlink
>>> >>> Ku-Band Downlink) by Todd E. Humphreys ? This paper will be published
>>> >>> in
>>> >>> IEEE Transactions on Aerospace and Electronic Systems. Are there
>>> >>> other
>>> >>> research efforts which try to do the same?
>>> >>>
>>> >>> Thanks
>>> >>>
>>> >>> Hesham
>>> >>>
>>> >>>
>>> >>> _______________________________________________
>>> >>> Starlink mailing list
>>> >>> Starlink at lists.bufferbloat.net
>>> >>> https://lists.bufferbloat.net/listinfo/starlink
>>> >>>
>>> >>
>>> >>
>>> >> --
>>> >> --
>>> >> Joe Hamelin, W7COM, Tulalip, WA, 360-474-7474
>>> _______________________________________________
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>>> Starlink at lists.bufferbloat.net
>>> https://lists.bufferbloat.net/listinfo/starlink
>>
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