From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pj1-x1033.google.com (mail-pj1-x1033.google.com [IPv6:2607:f8b0:4864:20::1033]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 2F8353CB37 for ; Fri, 23 Jun 2023 12:15:06 -0400 (EDT) Received: by mail-pj1-x1033.google.com with SMTP id 98e67ed59e1d1-25eb3db3004so429911a91.0 for ; Fri, 23 Jun 2023 09:15:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1687536905; x=1690128905; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=QYNcGd5sjA1HrCm504bXURZOJ8wUBwpi59WVEQEpmXw=; b=GGRQc7gnawiDvMe6rh+E/nXCdk0mIMvIhuWmkfC4X1wTZrf6HinPHhuH3o+Do/o6vg XGVpLRh3eiC8gmfqQX1Xeox6+w9pq+AZ4KsZG7/BlhnhUQYqcJ68qUZyyb+ndC8c39C+ dmJZahf9XFrjZluvPTmAQ+k8Ml7ygUwj/xDykXBu0dFN4KsQrAIid2iau/CUG8/3ofPH 12+4h7sPkVJ1HX/uHJWLEP0E8vXgS7SLTxhf5BAk0Rm0MJlWm3vzeuHdWwOVQzJloTcK ou39eF4jl+VJLAVPv9dFB2EKy2Jt428f+tsH8Q16IgTn72rfnSts+9b9rWDj23qJM4c4 6iZQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1687536905; x=1690128905; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=QYNcGd5sjA1HrCm504bXURZOJ8wUBwpi59WVEQEpmXw=; b=hky8i6rkT4Sza/u7jMIoQRtdrTNDTVTfnivWp8KcolHUd8LWM5NTmXSOzqWbxs99xH +CaRnd+HKk8ymIHBwN3oO92PRPfbE8PPhGnG3ET9zahEJNgYpHjLTeggDtTWvfmwCCE+ hLy0sQTdkAx0/deJAW+KvlSXnjbGwFYORxygu5CjqeEDUcA1Gd7KlWxHZwjhy/7TC/oQ sEKVy2SUJhQqKXa/hm8L7sHhOYbEZJG/8IJRU5bPcNASm2HL3qkbELpw9rXOU3dY3yP3 DIGce69XT2Q+ZXX1TrO9vbbPn+2rBHFsE0VLYImAKYmXHWtMPyEHdB/Prjjh2zEDwF7U a6/A== X-Gm-Message-State: AC+VfDzrHT6TP9C9VNjdIBL7216K/dEpz5M2tC6fhx2lpGnMd0KqyNiC 3cNDaJk4I5tuR57HCYYwGXiLIZGUfZe3JcithZtsSdkk X-Google-Smtp-Source: ACHHUZ5O7twRa+Xczs2v7aAETWDuXnrEdFseB0iL8q+dsnjYtMfrJyO7w4ulgZN/uugix+C70bZMMdXQX+qJuJgP/XY= X-Received: by 2002:a17:90b:250:b0:25c:1d12:7f9d with SMTP id fz16-20020a17090b025000b0025c1d127f9dmr15023610pjb.20.1687536905082; Fri, 23 Jun 2023 09:15:05 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Hesham ElBakoury Date: Fri, 23 Jun 2023 09:14:52 -0700 Message-ID: To: =?UTF-8?Q?David_Fern=C3=A1ndez?= Cc: Dave Taht via Starlink Content-Type: multipart/alternative; boundary="000000000000c5da5a05fece4d5e" Subject: Re: [Starlink] Signal Structure of the Starlink Ku-Band Downlink X-BeenThere: starlink@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: "Starlink has bufferbloat. Bad." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 23 Jun 2023 16:15:06 -0000 --000000000000c5da5a05fece4d5e Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable What was Elon Musk reaction to this research? Hesham On Fri, Jun 23, 2023, 9:12 AM David Fern=C3=A1ndez via Starlink < starlink@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 > > To: Hesham ElBakoury > > Cc: starlink@lists.bufferbloat.net > > Subject: Re: [Starlink] Signal Structure of the Starlink Ku-Band > > Downlink > > Message-ID: > > HGeGe39vAKTeG5RHBxSgioccOj+R4Nt7yeA@mail.gmail.com> > > Content-Type: text/plain; charset=3D"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 identifie= d > > 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=E2=80=AFAM Joe Hamelin = wrote: > > > >> > >> > https://radionavlab.ae.utexas.edu/wp-content/uploads/2023/01/starlink_str= ucture.pdf > >> > >> Here's the PDF. > >> > >> On Fri, Jun 23, 2023 at 2:55=E2=80=AFAM Hesham ElBakoury via Starlink = < > >> starlink@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 othe= r > >>> research efforts which try to do the same? > >>> > >>> Thanks > >>> > >>> Hesham > >>> > >>> > >>> _______________________________________________ > >>> Starlink mailing list > >>> Starlink@lists.bufferbloat.net > >>> https://lists.bufferbloat.net/listinfo/starlink > >>> > >> > >> > >> -- > >> -- > >> Joe Hamelin, W7COM, Tulalip, WA, 360-474-7474 > _______________________________________________ > Starlink mailing list > Starlink@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/starlink > --000000000000c5da5a05fece4d5e Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
What was Elon Musk reaction to this research?

Hesham

On Fri, Jun 23, 2023, 9:12 AM= David Fern=C3=A1ndez via Starlink <starlink@lists.bufferbloat.net> wrote:
I think that paper has already been discussed in t= his list. It
appeared in the news a while ago:
https://www.theregi= ster.com/2022/10/24/starlink_signal_decoded_for_use

Regards,

David

> Date: Fri, 23 Jun 2023 06:17:08 -0700
> From: Joe Hamelin <nethead@gmail.com>
> To: Hesham ElBakoury <helbakoury@gmail.com>
> Cc: starlink@lists.bufferbloat.net
> Subject: Re: [Starlink] Signal Structure of the Starlink Ku-Band
>=C2=A0 =C2=A0 =C2=A0 =C2=A0Downlink
> Message-ID:
>=C2=A0 =C2=A0 =C2=A0 =C2=A0<CAO0-hXar-KaB=3Dp=3DHGeGe39vAKTeG5RHBxSgioccOj+R4Nt7yeA@mail.gmail.com><= br> > Content-Type: text/plain; charset=3D"utf-8"
>
> Most interesting:
>
> " VIII. CONCLUSIONS We have developed and applied a blind signal<= br> > identification technique to uncover the frequency- and time-domain
> structure of the Starlink Ku-band downlink signal. We further identifi= ed
> four synchronization sequences that can be used to *passively exploit*=
> Starlink signals for pseudorange-based positioning, navigation, and ti= ming
> (PNT), and explicitly evaluated two of these. The results in this pape= r
> illuminate the *path to use of Starlink signals as a backup to traditi= onal
> GNSS* for PNT."
>
> On Fri, Jun 23, 2023 at 6:09=E2=80=AFAM Joe Hamelin <nethead@gmail.c= om> wrote:
>
>>
>> https://radionavlab.ae.utexas.edu/wp-content/uploads/2023/01/starlink_st= ructure.pdf
>>
>> Here's the PDF.
>>
>> On Fri, Jun 23, 2023 at 2:55=E2=80=AFAM Hesham ElBakoury via Starl= ink <
>> starlink@lists.bufferbloat.net> wrote:
>>
>>> Has anyone looked at this paper (Signal Structure of the Starl= ink
>>> Ku-Band Downlink) by Todd E. Humphreys ? This paper will be pu= blished in
>>> IEEE Transactions on Aerospace and Electronic Systems. Are the= re other
>>> research efforts which try to do the same?
>>>
>>> Thanks
>>>
>>> Hesham
>>>
>>>
>>> _______________________________________________
>>> Starlink mailing list
>>> Starlink@lists.bufferbloat.net
>>> https://lists.bufferbloat.net= /listinfo/starlink
>>>
>>
>>
>> --
>> --
>> Joe Hamelin, W7COM, Tulalip, WA, 360-474-7474
_______________________________________________
Starlink mailing list
Starlink@lists.bufferbloat.net
https://lists.bufferbloat.net/listinfo/sta= rlink
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