[SQM] minutes from SQM meeting

jean-marie mengeot jean.marie.mengeot at gmail.com
Mon Jul 11 11:34:40 UTC 2011

Hi everyone,

I also have the lightmeter (
http://kuffner-sternwarte.at/hms/wiki/index.php5?title=Lightmeter) Data is
sent to GAVO but not yet calibrated.
I also have made the acquisition of a SQM-L. I'll bring that for the next
meeting in Osnabrück in October.

2011/7/7 Christopher Kyba <christopher.kyba at wew.fu-berlin.de>

> I wanted to forward this message to the list in case there are any
> other SQM users out there who missed our first call to participate.
> Briefly, an international group of light pollution researchers wants
> to write a paper using data from fixed SQM stations.  If you'd like to
> participate please send me an email.
> Christopher Kyba
> Free University of Berlin
> ---------- Forwarded message ----------
> From: International Sky Brightness Survey <sqm at wew.fu-berlin.de>
> Hello SQM users,
> Today I had a phone discussion with Dorien Lolkema of RIVM of the
> Netherlands and Andrea Giacomelli of BMP in Italy.  At the moment
> those two groups are operating the largest networks of fixed-position
> SQMs that I am aware of.  I wanted to share the results of the
> discussion with you.
> o I would appreciate it if everyone who wants to be involved would
> send me a sample SQM data file for a single day (with your standard
> filename, and including any headers) so that I can get an idea of how
> varied the data formats are.  Please also send me your longitude and
> latitude so that I can investigate what weather stations are nearest
> you (you can send me that information, too, if you know it).
> o The BMP group already has a fully operational open access online
> database system, but it is in Italian and they don't have the
> resources to translate everything on a short time scale.  It is
> possible that in the longer term this system could be expanded to
> other languages.
> o If a database is established in the future, it will probably be
> necessary for all of the users to adopt a common data format.  In
> order to do our preliminary analysis I will convert each user's data
> into a common format, so if you share your data I should be able to
> provide you with a script capable of converting all of your old files
> into the new common format (and possibly vice-versa).
> o The goal of the first paper (which we will pursue independent of the
> database) will be to get cloud-free measurements at each site, as well
> as the overcast/clear brightness ratio.  It is likely that we will
> have to remove the summer solstice period from some dark sites (and
> possibly all sites).  We anticipate that this should still leave
> enough data for a reasonable analysis.
> o We think it makes sense that the dataset for the first paper be
> fully available to the public at the time the paper is published.
> There will be no obligation to share any data outside of the analysis
> period.
> o If enough people participate we should gain significant experience
> this summer in the potential difficulties of combining data from
> multiple sites.  We hope to use this experience to write a working
> paper suggesting best practices when taking SQM data and
> recommendations for data format that we could distribute at the
> Osnabrück meeting.
> o The BMP group will probably bring their SQM calibration device to
> the Osnabrück meeting, so if you are coming you could bring your SQM
> (& housing!) to get it calibrated against many others.
> o We will investigate the possibility of organizing a half day "SQM
> Workshop" before or after the Osnabrück meeting, to discuss SQM
> calibration issues, the working paper, the journal paper, and future
> database plans.
> o We didn't have a chance to discuss it on the phone, but I wanted to
> bring up the issue of authorship for the journal paper.  My suggestion
> would be that anyone who provides data is eligible to be an author,
> and that since this is a large, collaborative group, we simply order
> the authors alphabetically.
> o We also didn't get a chance to discuss the IYA Lightmeter on the
> call.  As many of you may know, there is already an open lightmeter
> database.  I would suggest that we endeavor to include the results
> from all available lightmeters in the same period.  While that data is
> freely provided, I think it would make sense to extend authorship to
> the people who are operating the lightmeters and the responsible
> database persons at GAVO.
> Finally, because it is the summer break for some people (and because
> we don't all know each other yet), I would suggest that you reply to
> me rather than to all, and I will collimate the responses and send
> them all back to you all in a single email towards the end of next
> week.  I have also made a doodle for the next meeting, which I suggest
> we hold mid-August (I realize many of you will be on break):
> http://www.doodle.com/ip92is3asafir88p
> That meeting will run from 4-5pm Europe Summer time.  The doodle site
> should allow you to see the time in your own time zone.
> Chris
> _______________________________________________
> sqm mailing list
> sqm at unihedron.com
> http://unihedron.com/cgi-bin/mailman/listinfo/sqm

Jean-Marie Mengeot
53 rue Charles Zoude
5000 Namur
GSM: 0473/ 53 90 93
Tél: 081/ 73 57 86

Vice-Président et Administrateur-Fondateur
AstroNamur ASBL
Site: http://www.astronamur.be
Forum: http://astronamur.forumactif.com

Trésorier et Administrateur-Fondateur
Association pour la Sauvegarde du Ciel et de l'Environnement Nocturnes ASBL
Site: http://www.ascen.be
Liste de discussion: http://groups.google.com/group/pollution-lumineuse
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://unihedron.com/pipermail/sqm/attachments/20110711/349f7c46/attachment.htm 

More information about the sqm mailing list