[SQM] minutes from SQM meeting
cwalker at noao.edu
Thu Jul 7 16:07:14 UTC 2011
Yes, Chris. I would like to participate. Sorry I did not see the first
announcment. I recently bought an SQM "station" and we have four in
Chile that our EPO counterparts are using. Plus I have trained 100s of
teachers and our department has bought hundreds of handheld meters in
recent years to go into dark skies education kits for the educators we
I can participate starting the middle part of August.
On Jul 7, 2011, at 5:36 AM, Christopher Kyba wrote:
> 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
> 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):
> 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.
> sqm mailing list
> sqm at unihedron.com
Constance E. Walker, Ph.D.
director, GLOBE at Night campaign (www.globeatnight.org)
chair, International Dark-Sky Association Education Committee
chair, IYA2009 Dark Skies Awareness Cornerstone Project
member, Astronomical Society of the Pacific Board of Directors
associate scientist & senior science education specialist, NOAO
National Optical Astronomy Observatory (NOAO)
950 N. Cherry Avenue
Tucson, AZ 85719 USA
cwalker at noao.edu
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