IETF Logo Mail Archive

Re: [Cbor] [dtn] [EXTERNAL] Re: [EXT] Re: LTC timescale (Re: Question regarding RFC 9171 - How to incorporate "Coordinated Lunar Time")

Jorge Amodio <jmamodio@gmail.com> Sat, 13 April 2024 01:52 UTC

Return-Path: <jmamodio@gmail.com>
X-Original-To: cbor@ietfa.amsl.com
Delivered-To: cbor@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C0C17C14F69C; Fri, 12 Apr 2024 18:52:56 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.097
X-Spam-Level:
X-Spam-Status: No, score=-2.097 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_ZEN_BLOCKED_OPENDNS=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=unavailable autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com
Received: from mail.ietf.org ([50.223.129.194]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id IBFb19NXUgaV; Fri, 12 Apr 2024 18:52:56 -0700 (PDT)
Received: from mail-vk1-xa2b.google.com (mail-vk1-xa2b.google.com [IPv6:2607:f8b0:4864:20::a2b]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 52829C14F68D; Fri, 12 Apr 2024 18:52:56 -0700 (PDT)
Received: by mail-vk1-xa2b.google.com with SMTP id 71dfb90a1353d-4db27d21a22so451672e0c.3; Fri, 12 Apr 2024 18:52:56 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1712973175; x=1713577975; darn=ietf.org; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=Mnpn5yHPvNCjvLQeKZTFTGRHIb31/LuxLHw70t4poWg=; b=SI6XP42K1QeJaHIsQoeJ3yTVqZchgYpzxDcVRLhgomH4cvgOjCntP/wAmjVQvLrElI NNWq1EGCPd7DP2QgPfkTplHPr9kmDKUSQtNTO83PhEBXs4eme23bByQNTK3+8GcAdFxo WcdHFk/Ak+EvrRru/H45CiXSsgqGYcge8HI4GxdIx65AIFsVprvjJxzVs2A6iQWy/C1w hQ680MBbUxDspXZRNZ+rY9kTOqaGTcNQQQU71vMfhotYbb1cN0atFCPPg4rXnYETotsG 8sbczzPtqoptasuAjjoCmcFTbMuJskHeEn2bVnmmLDVsePSQl/gfsz/5pAnNdmvJb2oR blMQ==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712973175; x=1713577975; 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=Mnpn5yHPvNCjvLQeKZTFTGRHIb31/LuxLHw70t4poWg=; b=V9M8Up4qdzSsXDZBHkYrz0GuApRyHlXRIc5CWyVLIvc+RG3ADfTSmJJu7dLd8Z+DVV 584fq4Ejv9J4yvbCcrkdZ03Ctx4GUz7IEDXnhwoMSPdk3tbr6R+prwDOoHQBNSNvTv0/ FOo1cC31TqHB3Gw+p12jqyzSzo4nqPY7fblui9rZAGbFqtA9DtFF+otmToyHntG9P+23 slpJBciG7PV+EYhM7YjTfYPX4Qyuap4yM69vSItFyuah06K08wpxavPupehfYeugBzzR UPNpfmffg386s5VMfgAr6vH96M1odUPloqmRvJ80nu7cInCGl9p0FoQFrC/N2PpdyLQa Q1sA==
X-Forwarded-Encrypted: i=1; AJvYcCU+X4CWCwCCdXi18j2dAnRjNy6ls3IaFAWTdPTr69buAfz3kdoq1gvGdvMNK9TdggvDqTi3b74m2APh+LZWqyzfRjQbA51Bzh6p4uQ=
X-Gm-Message-State: AOJu0YyHb2Q8iGjgzpoGyZC7DtI9fLjU9sNQPuOV6GjwVVmNTNpuKijp 7Jd/wEvYtZ8FVZ5g0gPvK9wnwX5qtYbs8C+Qzwq22U+62hV7uP5lATuZnW79RnHoqXZ0hXs6qcy EgcPRrupn+gky/3vVSjFVFuPHo8Fajwse
X-Google-Smtp-Source: AGHT+IFwHJ+mvxmrQ07oVQAlOCplxMzx4N0JPTKxzQ6r/l6HPN+MWt3rkj0teI9QjYpjtS4tZr6Qu1ul6SUyXh7b6P8=
X-Received: by 2002:a05:6122:882:b0:4c8:90e5:6792 with SMTP id 2-20020a056122088200b004c890e56792mr5263243vkf.7.1712973173567; Fri, 12 Apr 2024 18:52:53 -0700 (PDT)
MIME-Version: 1.0
References: <85584DCA-C858-4298-B0F4-555FC42138F1@gmail.com> <141AE72F-7E78-47E6-9912-65A46AD11EF4@gmail.com> <d19700964a314d6e9cd24c07b2a47c10@jhuapl.edu> <017b01da8cef$ecbdb920$c6392b60$@gmail.com> <CAMzo+1aYC+cg=os8zQi3US1i+YX_WrMy-XcJY-haFp2GbMYavw@mail.gmail.com> <PH8PR09MB89266BA5D11006169DD30B31F1042@PH8PR09MB8926.namprd09.prod.outlook.com> <d320b79e-fef4-4845-8caf-db138c795db6@cs.tcd.ie> <042001da8d3f$4f9bd640$eed382c0$@gmail.com>
In-Reply-To: <042001da8d3f$4f9bd640$eed382c0$@gmail.com>
From: Jorge Amodio <jmamodio@gmail.com>
Date: Fri, 12 Apr 2024 20:52:18 -0500
Message-ID: <CAMzo+1Z2CO-+Y4Rq74BrR6P6hgupo1pziJhsGG_1ophK5dpzPw@mail.gmail.com>
To: sburleig.sb@gmail.com
Cc: Stephen Farrell <stephen.farrell@cs.tcd.ie>, "Rieber, Richard R (US 347R)" <richard.r.rieber=40jpl.nasa.gov@dmarc.ietf.org>, "EXTERNAL-Sipos, Brian J (US 9300-Affiliate)" <brian.sipos@jhuapl.edu>, John Dowdell <john.dowdell.ietf@gmail.com>, Carsten Bormann <cabo@tzi.org>, DTN WG <dtn@ietf.org>, cbor@ietf.org
Content-Type: multipart/alternative; boundary="0000000000008538640615f0a576"
Archived-At: <https://mailarchive.ietf.org/arch/msg/cbor/kuklVlXsaDzXkbxIfnTlCSW0E-A>
Subject: Re: [Cbor] [dtn] [EXTERNAL] Re: [EXT] Re: LTC timescale (Re: Question regarding RFC 9171 - How to incorporate "Coordinated Lunar Time")
X-BeenThere: cbor@ietf.org
X-Mailman-Version: 2.1.39
Precedence: list
List-Id: "Concise Binary Object Representation \(CBOR\)" <cbor.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/cbor>, <mailto:cbor-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/cbor/>
List-Post: <mailto:cbor@ietf.org>
List-Help: <mailto:cbor-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/cbor>, <mailto:cbor-request@ietf.org?subject=subscribe>
X-List-Received-Date: Sat, 13 Apr 2024 01:52:56 -0000

+1

On Fri, Apr 12, 2024 at 8:10 PM <sburleig.sb@gmail.com> wrote:

> I completely agree.  As I suggested earlier, absolute alignment among BP
> nodes' clocks to microsecond accuracy is in no way necessary.  Changing the
> definition of "DTN time" would destabilize the BP specification - requiring
> modification of all BP implementations on all BP nodes in the Solar System,
> further deferring adoption of BP by flight missions, and broadly increasing
> mission cost - to no material benefit.  Let's not do it.
>
> Scott
>
> -----Original Message-----
> From: Stephen Farrell <stephen.farrell@cs.tcd.ie>
> Sent: Friday, April 12, 2024 12:56 PM
> To: Rieber, Richard R (US 347R) <richard.r.rieber=
> 40jpl.nasa.gov@dmarc.ietf.org>; Jorge Amodio <jmamodio@gmail.com>;
> sburleig.sb@gmail.com
> Cc: EXTERNAL-Sipos, Brian J (US 9300-Affiliate) <brian.sipos@jhuapl.edu>;
> John Dowdell <john.dowdell.ietf@gmail.com>; Carsten Bormann <cabo@tzi.org>;
> DTN WG <dtn@ietf.org>; cbor@ietf.org
> Subject: Re: [dtn] [EXTERNAL] Re: [EXT] Re: LTC timescale (Re: Question
> regarding RFC 9171 - How to incorporate "Coordinated Lunar Time")
>
>
> Hiya,
>
> On 12/04/2024 18:05, Rieber, Richard R (US 347R) wrote:
> > Does anyone think we should tweak the DTN Time field to utilize the
> > CBOR Timescale/Timesystem standard Carsten mentioned? I think we
> > should.
>
> I do not think such a change would be a good idea.
>
> If you did, then ISTM eventually nearly every BP node would need to be
> able to understand and translate between every possible planetary
> timescale. Sounds like a recipe for bugs and possible vulnerabilities to me.
>
> So, better for the lunar devices to translate to/from UTC when making or
> reading bundles I think.
>
> Cheers,
> S.
>
>

v2.23.0 | Report a Bug | By Email