From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ot1-x332.google.com (mail-ot1-x332.google.com [IPv6:2607:f8b0:4864:20::332]) (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 453EB3CB37 for ; Wed, 7 Sep 2022 00:30:28 -0400 (EDT) Received: by mail-ot1-x332.google.com with SMTP id m21-20020a9d6ad5000000b00638df677850so9481039otq.5 for ; Tue, 06 Sep 2022 21:30:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=perens.com; s=google; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date; bh=kydcKJrdbvHYwDEGH3rO+DlmQ5/x6YoM3XSTxiSLDm0=; b=aYXUOP+WNbGDGwPy8UJ+/vcS2P+Xj4+xabQ4yv1WyKRardhqtEoFv64Q92Rkvf17Jp fFkfKuKjRDomqGedhavwDXieZ/U5IH9s5zcL+nvk+fHznOejJH4Z4+lQdgV+zBcUQC/J fOjlgA1KSb4u1NTZ4B0cblGbar4c49pWJvazE= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date; bh=kydcKJrdbvHYwDEGH3rO+DlmQ5/x6YoM3XSTxiSLDm0=; b=La7j0vbHm3nF9UH/DhrDjsHTQKPvPcihzCuWoMZK12hjH2DHtBgCt1lXwcSehjxbrF ffc1JZDGpUX1tpCUVUnaBW6xYPHhayOggVphcrFT5pCXDTAC/HLdsyDXGTRvWcxUnGHI Qsswvm29b8zU5WGzJsKVyZvPQneTwbWE/YF32JCU/xYIzpc8hnrPCUulweJgA85V+917 ILARrbDPHCqUr7BxGjeJ15PFvnPV6ccl4Kb7aUNb1hinPil8APsfyizQy7sh5gmRm4bs QRRDT743Y9RnTaSh3D3mw91qCpjmGO6yIvQlBuHmuEaOrXf3/62q6K+s0VbfH/31b1F1 6beA== X-Gm-Message-State: ACgBeo3jV+del7b0JsmWkfICLhODC0grnm1sur7fLVu6agE4c5mye5zg e5sawJF14K8TnKDTl0u6aRiMniLDTau71UTSla/Bvw== X-Google-Smtp-Source: AA6agR42Kom7oM9RzIf9tK2Eqfo/AyiRAaethBaV82s/RKovQL2LBHQCi4mPVA+cgUDy+C9cM3I53K6TuooguG0EbrM= X-Received: by 2002:a9d:7a8d:0:b0:636:eb5c:df96 with SMTP id l13-20020a9d7a8d000000b00636eb5cdf96mr715186otn.173.1662525027424; Tue, 06 Sep 2022 21:30:27 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Bruce Perens Date: Tue, 6 Sep 2022 21:30:16 -0700 Message-ID: To: Dave Taht Cc: Dave Taht via Starlink Content-Type: multipart/alternative; boundary="000000000000b0ad0605e80ec58e" Subject: Re: [Starlink] risc-v in space 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: Wed, 07 Sep 2022 04:30:28 -0000 --000000000000b0ad0605e80ec58e Content-Type: text/plain; charset="UTF-8" On Tue, Sep 6, 2022 at 12:19 PM Dave Taht via Starlink < starlink@lists.bufferbloat.net> wrote: > in an era where cubesats had about a 50% failure rate. Phil Karn KA9Q felt that this was mostly because of a poor choice of data link. I think a lot of folks were using AX-25 packet radio, which wasn't intended for satellites. He wrote a modem called BPSK1000 which can tolerate 1-minute fades as a satellite tumbles and the antenna points away from Earth. Thanks Bruce -- Bruce Perens K6BP --000000000000b0ad0605e80ec58e Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


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On Tue, Sep 6, 2022 at 12:19 PM Dave = Taht via Starlink <sta= rlink@lists.bufferbloat.net> wrote:
in an era where cubesats had about a 50% failure= rate.

Phil Karn KA9Q felt that this was mo= stly because of a poor choice of data link. I think a lot of folks were usi= ng AX-25 packet radio, which wasn't intended for satellites. He wrote a= modem called BPSK1000 which can tolerate 1-minute fades as a satellite tum= bles and the antenna points away from Earth.

=C2= =A0 =C2=A0 Thanks

=C2=A0 =C2=A0 Bruce
-= -
Bruce Perens K6BP
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