Path: csiph.com!au2pb.net!feeder.erje.net!1.eu.feeder.erje.net!fu-berlin.de!uni-berlin.de!not-for-mail
From: Chris Angelico <rosuav@gmail.com>
Newsgroups: comp.lang.python
Subject: Re: geostationary satellite data
Date: Thu, 17 Dec 2015 04:37:26 +1100
Lines: 19
Message-ID: <mailman.22.1450287455.30845.python-list@python.org>
References: <mailman.11.1450280795.30845.python-list@python.org> <dddjs0Fevt5U1@mid.individual.net> <mailman.21.1450285692.30845.python-list@python.org> <dddlcuFg1u6U1@mid.individual.net>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8
X-Trace: news.uni-berlin.de Ib76Oyr++8PrbAj9NIso+Qux1fmChMVFAO5fsjZpQOvg==
Return-Path: <rosuav@gmail.com>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
X-Spam-Status: OK 0.021
X-Spam-Evidence: '*H*': 0.96; '*S*': 0.00; 'source.': 0.05; 'cc:addr :python-list': 0.09; 'tends': 0.09; 'thu,': 0.15; 'begging': 0.16; 'datasets': 0.16; 'echo': 0.16; 'exceptions.': 0.16; 'from:addr:rosuav': 0.16; 'from:name:chris angelico': 0.16; 'hmm.': 0.16; 'received:io': 0.16; 'received:psf.io': 0.16; 'wrote:': 0.16; 'byte': 0.18; '2015': 0.20; 'cc:2**0': 0.20; 'cc:addr:python.org': 0.20; 'am,': 0.23; 'dec': 0.23; 'header:In- Reply-To:1': 0.24; 'message-id:@mail.gmail.com': 0.27; 'agreed.': 0.29; 'maybe': 0.33; 'received:google.com': 0.35; 'trouble': 0.35; 'something': 0.35; 'but': 0.36; 'received:209.85': 0.36; 'subject:: ': 0.37; 'two': 0.37; 'received:209.85.213': 0.37; 'received:209': 0.38; 'mean': 0.38; 'goes': 0.39; 'format': 0.39; 'identify': 0.61; 'making': 0.62; 'different': 0.63; 'online,': 0.83; 'chrisa': 0.84; 'hypothesis': 0.84; 'subject:satellite': 0.84; 'to:none': 0.91; 'subject:skip:g 10': 0.91
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:cc :content-type; bh=+rL9nUsJ99dXwAu/UNdGFzoYYEApTYS5MQw4+mW4GGE=; b=S3kdiICzYzWqLQ1SIqn+BrRW06H7XOTjoKodCISRhS1gzDCxNjAykoRzzyKc+cG4/V /k3EfJfOEHKpxtsPq63+DvgFlKvJiIOMSkIpxoDtnvROuVewmYrHjaCmnglrZDlCMo8D wX4nSLRyHLeWSdYB7Rl1iXMnsHwyyRLd3n9UkvtkR195bdVh4wQH+D7cVmCS6gDl6fhP eRqTsg1SZRPznPJCmZcPXf2iLsCeWypgdZWgskUBZ9TPecs7uwN+riBGU8/SDGDZ/AEk yjHsZIZUz7uAVBgjI8TufI6rjXSa9/Ln9zXQZ+PwCka48ZN6mXYXXwpQ1nRuGKFZ4wuX vUAA==
X-Received: by 10.107.150.82 with SMTP id y79mr8452333iod.31.1450287446552; Wed, 16 Dec 2015 09:37:26 -0800 (PST)
In-Reply-To: <dddlcuFg1u6U1@mid.individual.net>
X-BeenThere: python-list@python.org
X-Mailman-Version: 2.1.20+
Precedence: list
List-Id: General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe: <https://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive: <http://mail.python.org/pipermail/python-list/>
List-Post: <mailto:python-list@python.org>
List-Help: <mailto:python-list-request@python.org?subject=help>
List-Subscribe: <https://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Xref: csiph.com comp.lang.python:100531

On Thu, Dec 17, 2015 at 4:30 AM, Peter Pearson
<pkpearson@nowhere.invalid> wrote:
> Agreed.  It's annoying when an agency goes to the trouble of making
> huge datasets available online, but fails to identify the format.
>
> But the 16-bits-per-pixel hypothesis is unlikely, given that each
> byte tends to echo its predecessor:
>
> 0000130 ffff ffff ffff ffff ffff ffff ffff ffff
> 0000140 ffff ffff ffff c0ff c1c0 c3c3 c3c3 c4c4
> 0000150 c4c4 c3c4 c3c3 c4c4 c3c3 c3c3 c3c3 c3c3
> 0000160 c4c4 c4c4 c5c4 c6c5 c7c7 c7c7 c5c5 c6c5

Hmm. With just a few exceptions. Maybe it's two channels or something
- is that what you mean by "taken at different wavelengths"?

Definitely it's begging for format identification from the source.

ChrisA