Author Topic: Dark Sky Meter Live map now online  (Read 616 times)

ndesevtenzio

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Dark Sky Meter Live map now online
« on: December 29, 2017, 01:16:33 PM »
Dear all,
Our Dark Sky Meter map is online. The map contains all valid night sky measurements made with the Dark Sky Meter for iPhone. It's fully automated.
Feel free to explore
http://www.darkskymeter.com/map/
Regards
Norbert

PS Note that this is a 'semi-live' map. All the data is refreshed every hour.



brunenrizap

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Re: Dark Sky Meter Live map now online
« Reply #1 on: December 30, 2017, 12:03:03 PM »
Hi Nop,This is excellent! Thank you, I'm already waiting for some new neat data in Tokyo - now if the app can also measure the frequency of light pollution, maybe we could find cities where phase of the streetlights is the same, and this skyglow peaks could be filtered out by blocking out light at the peaks  OK the above was a bit "out there", some on a more feasible angle, I think this app could also turn into a great way to find nice observation places - my understanding is that locations are rounded to 800 meters. Wouldn't it be a good idea to allow users to disclose the exact location (from a public park for example) should they chose to do so? This would turn into a great dictionary of observation sites.This would be particularly useful for city dwellers like me, in Tokyo, to know where we could travel by train to which park to get the best skies possible! Under that mode, if submitters could also rate their location (streetlights, public lights, etc.) it would make it even more powerful.Yannick

tirafarpa

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Re: Dark Sky Meter Live map now online
« Reply #2 on: January 08, 2018, 02:20:42 PM »
Pretty cool.  Though, I'm an Android guy.  I don't have any iOS devices.

acbrawexel

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Re: Dark Sky Meter Live map now online
« Reply #3 on: January 09, 2018, 02:17:11 PM »
Oh, that's cool. Just saw my post of 18.42 here in Gastonia, NC.Bob

Shane Proulx

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Re: Dark Sky Meter Live map now online
« Reply #4 on: January 09, 2018, 07:47:14 PM »
i wish you would fuzz the locations on the map a little bit... bit of a privacy concern.

aninerti

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Re: Dark Sky Meter Live map now online
« Reply #5 on: January 10, 2018, 07:21:46 AM »
Thanks!A quick note on location:- The locations are rounded (about 110 meters for privacy reasons. - Uploading is not obligatory. The app doesn't do any 'sneaky uploading':) . So you are in control.- If you don't want your location on the map. Simply erase it from the 'My Data' menu (swipe and delete)

James Clayton

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Re: Dark Sky Meter Live map now online
« Reply #6 on: January 11, 2018, 07:19:07 AM »
It would be nice if the moon phase could somehow be calculated out of the number so that all locations show actual LP factors regardless of moon phase.

Mark Patterson

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Re: Dark Sky Meter Live map now online
« Reply #7 on: January 13, 2018, 08:30:04 AM »
Yes, we are discussing that. But, it is and will be an estimated result. There's a lot of side effects measuring with moon (dirty sensor, bad transparency etc).

Bryce Roberts

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Re: Dark Sky Meter Live map now online
« Reply #8 on: January 14, 2018, 03:13:15 AM »
If I uncheck the markers for data that appears less useable, there's not much left. Wrong/no time, low angle, clouds...you're getting many more less useful readings than useful ones. Any way to imrpove those percentages?

migresinli

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Re: Dark Sky Meter Live map now online
« Reply #9 on: January 15, 2018, 10:30:31 AM »
@derangedhermit
It will need some time. Keep in mind that the app is released only 2 months ago and for the Northern hemisphere the nights are getting shorter. Here in Europe the weather has been terrible. So there's a lack of good readings. I'll expect to have a good number of readings coming this fall and more amateur astronomers will provide useful SQM measurements. And I hope we get a lot of users on the southern hemisphere.
With over 2000 downloads worldwide (lite+pro) the app has a good potential.

Dave Jones

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Re: Dark Sky Meter Live map now online
« Reply #10 on: January 17, 2018, 11:24:40 PM »
I know it will. I hope the app or server provides feedback to users about no/wrong time, pointing angle - whatever it can to improve the readings.

dsepinumer

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Re: Dark Sky Meter Live map now online
« Reply #11 on: January 20, 2018, 11:48:22 PM »
Quote
Dark Sky Meter for iPhone
There are also a lot of Android phone users who could be recruited to add more data points.

Daniel Ross

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Re: Dark Sky Meter Live map now online
« Reply #12 on: January 21, 2018, 03:53:31 AM »
Android phones have a lot of variability in their cameras. A different app was developed for them. Check it out here:
https://play.google....lux.welovestars

bullgidava

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Re: Dark Sky Meter Live map now online
« Reply #13 on: January 23, 2018, 03:48:35 AM »
Quote
i wish you would fuzz the locations on the map a little bit... bit of a privacy concern.

=========

Don't worry my friend, the NSA knows exactly where you are!  (and the fact that we are having this correspondence)

Brian Olatunji

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Re: Dark Sky Meter Live map now online
« Reply #14 on: January 23, 2018, 12:26:48 PM »
I have installed the Pro version yesterday. Here is a comparison with a "hardware" SQM.

a) Today at my home.
I took 5 SQM readings, which were: 18.88, 18.89, 18.87, 18.87, 18.87. Mean 18.876 and SD < 0.01
I took 5 Dark Sky Meter readings which were: 18.78, 18.82, 18.73, 18.75, 18.84. Mean 18.784, SD 0.046.
The difference between the two means is less than 0.1mpsas, ie less than the claimed accuracy of standard SQM (mine is a little bit optimistic). HOWEVER the repeatability of the Dark Sky Meter is nearly 5 times worse.

b) Yesterday at dark site.
The SQM was averaging at 21.6, with deviations of the order of 0.1. But the DSM, in such low lights, had very large fluctuations, from 21.4 to 22.2 (nearly one magnitude).

It seems that in low lights (ie what is more interesting for me) the DSM is loosing accuracy.

Hopefully tomorrow I will be on a dark site again and I will record carefully the readings of both.