{"id":3324,"date":"2018-11-17T15:12:55","date_gmt":"2018-11-17T15:12:55","guid":{"rendered":"https:\/\/www.geoptik.com\/?product=sky-quality-meter-lu-dl-v"},"modified":"2021-06-15T15:19:51","modified_gmt":"2021-06-15T15:19:51","slug":"sky-quality-meter-lu-dl-v","status":"publish","type":"product","link":"https:\/\/www.geoptik.com\/en\/prodotto\/sky-quality-meter-lu-dl-v\/","title":{"rendered":"Sky Quality Meter &#8220;LU-DL-V&#8221;"},"content":{"rendered":"<p><span style=\"font-size:16px;\"><span style=\"font-family: verdana,geneva,sans-serif;\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\"><b>A USB enabled data-logging light meter for night-time sky brightness monitoring!<\/b><\/font><\/font><\/span><\/span><\/p>\n<p><span style=\"font-size:16px;\"><span style=\"font-family: verdana,geneva,sans-serif;\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\">An affordable meter for continual, connected or autonomous data-logging to measure sky brightness for astronomers and light pollution investigators.<\/font><\/font><\/span><\/span><\/p>\n<p><span style=\"font-size:16px;\"><span style=\"font-family: verdana,geneva,sans-serif;\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\">The &#8220;Sky Quality Meter &#8211; LU-DL-V&#8221;&nbsp; measures the brightness of the night sky in magnitudes per square arcsecond.<\/font><\/font><\/span><\/span><\/p>\n<p><span style=\"font-size:20px;\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\"><b>Uses:<\/b> <\/font><\/font><\/font><\/font><\/span><\/p>\n<ul>\n<li><span style=\"font-size:16px;\"><span style=\"font-family: verdana,geneva,sans-serif;\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\">Measuring the night sky brightness during remote biological field experiments.<\/font><\/font><\/span><\/span><\/li>\n<li><span style=\"font-size:16px;\"><span style=\"font-family: verdana,geneva,sans-serif;\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\">Find out how good the night or site REALLY is.<\/font><\/font><\/span><\/span><\/li>\n<li><span style=\"font-size:16px;\"><span style=\"font-family: verdana,geneva,sans-serif;\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\">Compare the sky brightness at different sites quantitatively.<\/font><\/font><\/span><\/span><\/li>\n<li><span style=\"font-size:16px;\"><span style=\"font-family: verdana,geneva,sans-serif;\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\">Document the evolution of light pollution in your area.<\/font><\/font><\/span><\/span><\/li>\n<li><span style=\"font-size:16px;\"><span style=\"font-family: verdana,geneva,sans-serif;\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\">Set planetarium dome illumination to mimic the skies people are likely to experience elsewhere in the city.<\/font><\/font><\/span><\/span><\/li>\n<li><span style=\"font-size:16px;\"><span style=\"font-family: verdana,geneva,sans-serif;\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\">Monitor sky brightness through the night, night-to-night, and year-to-year.<\/font><\/font><\/span><\/span><\/li>\n<li><span style=\"font-size:16px;\"><span style=\"font-family: verdana,geneva,sans-serif;\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\">Determine which nights show the greatest promise for finding the &#8216;faintest fuzzies&#8217;!<\/font><\/font><\/span><\/span><\/li>\n<li><span style=\"font-size:16px;\"><span style=\"font-family: verdana,geneva,sans-serif;\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\">Calibrate the effect of sky brightness on qualitative measures such as the Bortle Scale.<\/font><\/font><\/span><\/span><\/li>\n<li><span style=\"font-size:16px;\"><span style=\"font-family: verdana,geneva,sans-serif;\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\">Investigate how sky brightness correlates with the solar cycle and month-to-month sunspot activity.<\/font><\/font><\/span><\/span><\/li>\n<li><span style=\"font-size:16px;\"><span style=\"font-family: verdana,geneva,sans-serif;\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\">Help provide local ground truth for future sky brightness prediction with the <span style=\"color:#0000ff;\">http:\/\/www.cleardarksky.com<\/span><\/font><\/font><\/span><\/span><\/li>\n<li><span style=\"font-size:16px;\"><span style=\"font-family: verdana,geneva,sans-serif;\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\"><a title=\"Charge-Coupled Device (type of image sensor)\"><strong>CCD<\/strong><\/a> users can make a correlation between the SQM reading and when the background reaches some <a title=\"Analog-to-Digital Converter\"><strong>ADC<\/strong><\/a> level.<\/font><\/font><\/span><\/span><\/li>\n<\/ul>\n<p><span style=\"font-size:16px;\"><span style=\"font-family: verdana,geneva,sans-serif;\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\"><b>Features:<\/b> <\/font><\/font><\/span><\/span><\/p>\n<ul>\n<li><span style=\"font-size:16px;\"><span style=\"font-family: verdana,geneva,sans-serif;\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\">Sky brightness reported in visual magnitudes per square arcsecond.<\/font><\/font><\/span><\/span><\/li>\n<li><span style=\"font-size:16px;\"><span style=\"font-family: verdana,geneva,sans-serif;\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\">Infrared blocking filter restricts measurement to visual bandpass.<\/font><\/font><\/span><\/span><\/li>\n<li><span style=\"font-size:16px;\"><span style=\"font-family: verdana,geneva,sans-serif;\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\">Sensor temperature, model number, and serial number are provided.<\/font><\/font><\/span><\/span><\/li>\n<li><span style=\"font-size:16px;\"><span style=\"font-family: verdana,geneva,sans-serif;\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\">Precision readings at even the darkest sites.<\/font><\/font><\/span><\/span><\/li>\n<li><span style=\"font-size:16px;\"><span style=\"font-family: verdana,geneva,sans-serif;\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\">Field-upgradeable firmware.<\/font><\/font><\/span><\/span><\/li>\n<li><span style=\"font-size:16px;\"><span style=\"font-family: verdana,geneva,sans-serif;\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\">Open protocol <a href=\"http:\/\/unihedron.com\/projects\/darksky\/cd\/SQM-LU-DL\/SQM-LU-DL_Users_manual.pdf\"><span style=\"color:#0000ff;\">document<\/span><\/a><span style=\"color:#0000ff;\">.<\/span><\/font><\/font><\/span><\/span><\/li>\n<\/ul>\n<p><span style=\"font-size:16px;\"><span style=\"font-family: verdana,geneva,sans-serif;\"><span style=\"font-size:20px;\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\"><b>Specifications:<\/b> <\/font><\/font><\/font><\/font><\/span><\/span><\/span><\/p>\n<ul>\n<li><span style=\"font-size:16px;\"><span style=\"font-family: verdana,geneva,sans-serif;\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\">USB connectivity<\/font><\/font><\/span><\/span><\/li>\n<li><span style=\"font-size:16px;\"><span style=\"font-family: verdana,geneva,sans-serif;\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\">Included applications for reading data in Perl.<\/font><\/font><\/span><\/span><\/li>\n<li><span style=\"font-size:16px;\"><span style=\"font-family: verdana,geneva,sans-serif;\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\">The Half Width Half Maximum (HWHM) of the angular sensitivity is ~10\u00b0. The Full Width Half Maximum (FWHM) is then ~20\u00b0. The sensitivity to a point source ~19\u00b0 off-axis is a factor of 10 lower than on-axis. A point source ~20\u00b0 and ~40\u00b0 off-axis would register 3.0 and 5.0 magnitudes fainter, respectively.<\/font><\/font><\/span><\/span><\/li>\n<li><span style=\"font-size:16px;\"><span style=\"font-family: verdana,geneva,sans-serif;\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\">Size 5.5 x 2.6 x 1.1 in.<\/font><\/font><\/span><\/span><\/li>\n<li><span style=\"font-size:16px;\"><span style=\"font-family: verdana,geneva,sans-serif;\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\">Maximum light sampling time: 80 seconds.<\/font><\/font><\/span><\/span><\/li>\n<li><span style=\"font-size:16px;\"><span style=\"font-family: verdana,geneva,sans-serif;\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\">Minimum light sampling time: 1 seconds.<\/font><\/font><\/span><\/span><\/li>\n<li><span style=\"font-size:16px;\"><span style=\"font-family: verdana,geneva,sans-serif;\"><font style=\"font:.9em sans-serif\"><font style=\"font:.9em sans-serif;color:#000000\">Specifications are subject to change without notice.<\/font><\/font><\/span><\/span><\/li>\n<li>\n<table align=\"left\" cellpadding=\"0\" cellspacing=\"0\" hspace=\"0\" vspace=\"0\">\n<tbody>\n<tr>\n<td align=\"left\">\n<p>Battery-to-USB type \u201cB\u201dadapter with 4 AA cells and battery holder<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>A USB enabled data-logging light meter for night-time sky brightness monitoring! An affordable meter for continual, connected or autonomous data-logging to measure sky brightness for astronomers and light pollution investigators. The &#8220;Sky Quality Meter &#8211; LU-DL-V&#8221;&nbsp; measures the brightness of the night sky in magnitudes per square arcsecond. Uses: Measuring the night sky brightness during [&hellip;]<\/p>\n","protected":false},"featured_media":3323,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_cat":[243],"product_tag":[],"_links":{"self":[{"href":"https:\/\/www.geoptik.com\/en\/wp-json\/wp\/v2\/product\/3324"}],"collection":[{"href":"https:\/\/www.geoptik.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.geoptik.com\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.geoptik.com\/en\/wp-json\/wp\/v2\/comments?post=3324"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.geoptik.com\/en\/wp-json\/wp\/v2\/media\/3323"}],"wp:attachment":[{"href":"https:\/\/www.geoptik.com\/en\/wp-json\/wp\/v2\/media?parent=3324"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.geoptik.com\/en\/wp-json\/wp\/v2\/product_cat?post=3324"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.geoptik.com\/en\/wp-json\/wp\/v2\/product_tag?post=3324"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}