Recent Posts

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General Discussion / Reports
« Last post by admin on February 16, 2014, 07:55:23 pm »
Two new papers on light pollution have been published in a highly respected journal, the "Journal of Quantitative Spectroscopy and Radiative Transfer":
  • "Night sky photometry and spectroscopy performed at the Vienna University Observatory": Science Direct, arXiv.
  • "The night sky brightness at Potsdam-Babelsberg including overcast and moonlit conditions": Science Direct, arXiv.
General Discussion / SQM-LU and INDI
« Last post by ffernandez on January 14, 2014, 05:06:58 pm »

  SQML-LU is now supported by INDI project ( Sergio Alonso main developer of "INDI for Java" project  has created this driver.
  Soon, we'll be able to announce a new version  of Maroc ( with INDI support. Any INDI compatible mount will be controlled by Maroc and also SQM-LU readings will be request using INDI protocol.
Connected meters (SQM-LE/LU/LR/DL) / SQM Reader Pro 2 software released
« Last post by knightware on September 24, 2013, 11:21:04 am »
Knightware is pleased to announce the release of SQM Reader Pro 2 software. SQM Reader Pro 2 reads sky darkness data from connected Sky Quality Meters automatically and continuously, displays and graphs data, stores data in files and transfers it to an FTP server and post processing scripts, batch files and programs. Readings can be submitted automatically to a live SQM Readings Map web page at

Readings may be stored in 2 data file formats, including the new Skyglow Observation Standard Format (see Skyglow Standard web page at  The standard format allows data to be shared with dark sky researchers around the world. Data files in both formats (plus Unihedron Device Manager format) may also be re-opened and processed with SQM Reader Pro 2 at a later time.

SQM Reader Pro 2 operates on Windows 8, 7, Vista and XP.  It supports reading SQM models LE (Ethernet), LU and LU-DL (USB) and LR (RS-232). It includes thorough documentation, online product support and online product updates. For full product description, please see .

Pricing and Availability
SQM Reader Pro is available by digital delivery ($50) and on CD ($58.95) directly from Knightware at
General Discussion / Tripod adaptors
« Last post by admin on July 30, 2013, 08:18:04 pm »
Tripod adaptors are now available for our meters:


This will help in consistently positioning the meter at various angles for detailed repetitive studies.

The kit includes one tripod adaptor, 3D-printed in ABS or PLA, and two longer screws (to replace two short screws already in the meter).

More details and ordering links can be found here.
Connected meters (SQM-LE/LU/LR/DL) / Import .dat file into Excel
« Last post by admin on April 30, 2013, 12:31:25 am »
The .dat file generated by UDM and defined here can be imported into a Microsoft Excel spreadsheet for calculations and graphing purposes as follows:
  • Start excel
  • File Open
  • Select "All files"
  • Select your .dat file (previously recorded and saved).
  • Select "delimited" (as opposed to the default "fixed width")
  • Import starting at line 33
  • Next
  • Unselect "Tab"
  • Select "Semicolon", you should see bars separating the data fields now.
  • Next
  • Define each field. European users will have to select "Advanced", then change the "Decimal point" to "." and "Thousands separator" to ","
  • field 1,2 = date YMD
General Discussion / Project MAROC: Robotic and Automatic Measurement of the dark sky
« Last post by admin on April 16, 2013, 12:17:39 am »
Here is an interesting project using the SQM-LU to scan and collect light readings with a motorized platform.

Submitted by: Fernando Fernandez
Organization: The amateur astronomy association of Spain; "Luz Cero"
Project name: MAROC (Robotic and Automatic Measurement of the dark sky)

We've developed an automated system to perform many lectures scanning near full sky and generating excel file and a graph. Software is Java based and GPL available for download. Hardware is a SQM-LU and a little board to control two step motors.

   More info (and video) at:


SQM-LU / MOVED: Software Support for SQM-LU/LE
« Last post by admin on February 06, 2013, 12:28:44 am »
SQM-LU-DL (Datalogging light meter) / MOVED: UDM updates
« Last post by admin on February 06, 2013, 12:27:50 am »
General Discussion / The GLOBE at Night Campaign
« Last post by admin on January 02, 2013, 11:55:08 pm »
Join the Worldwide GLOBE at Night 2013 Campaign

What would it be like without stars at night? What is it we lose? Starry night skies have given us poetry, art, music and the wonder to explore. A bright night sky (aka light pollution) affects energy consumption, health and wildlife too. Spend a few minutes to help scientists by measuring the brightness of your night sky. Join the GLOBE at Night citizen-science campaign ( The first campaign starts January 3 and runs through January 12.

More information:

GLOBE at Night is a worldwide, hands-on science and education program to encourage citizen-scientists worldwide to record the brightness of their night sky. During five select sets of dates in 2013, children and adults match the appearance of a constellation (Orion or Leo in the northern hemisphere, and Orion and Crux in the southern hemisphere) with seven star charts of progressively fainter stars ( Participants then submit their choice of star chart at with their date, time and location. This can be done by computer (after the measurement) or by smart phone or pad (during the measurement). From these data an interactive map of all worldwide observations is created ( Over the past 7 years of 10-day campaigns, people in 115 countries have contributed over 83,000 measurements, making GLOBE at Night the most successful, light pollution citizen-science campaign to date ( The GLOBE at Night website is easy to use, comprehensive, and holds an abundance of background information ( and Guides, activities, one-page flyers and postcards advertising the campaign are available at Through GLOBE at Night, students, teachers, parents and community members are amassing a data set from which they can explore the nature of light pollution locally and across the globe. There are 5 GLOBE at Night campaigns in 2013: January 3 - 12, January 31 - February 9, March 3 - 12, March 31 - April 9, and April 29 - May 8. Make a difference and Join the GLOBE at Night campaign.

Listen to a fun skit on GLOBE at Night in a 7-minute audio podcast at

Visit us on the Web:
Find us on Facebook:
Follow us on Twitter:
Subscribe to our mailing list for updates:
Contact us:
Connected meters (SQM-LE/LU/LR/DL) / Knightware: Software Support for SQM-LU/LE
« Last post by knightware on December 26, 2012, 01:34:11 pm »
Knightware recently released Deep-Sky Planner 6 software which provides complete planning and logging features for users of Windows XP, Vista, 7 & 8. Knightware also offers SQM Reader (free) and SQM Reader Pro software for Unihedron's connected Sky Quality Meters - models LU, LE and LR.

The logging function in Deep-Sky Planner allows users to read a connected SQM and store the result automatically in a visual or imaging observation. This is the only planning and logging software that offers this feature.

You can learn more about Deep-Sky Planner, SQM Reader and SQM Reader Pro at

Special Offer for US Customers
Knightware offers SQM-LU or SQM-LE + SQM Reader Pro software at an unbeatable price to customers located in the US. This package is available only from Knightware. See
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