{"id":5799,"date":"2023-02-07T23:09:55","date_gmt":"2023-02-07T23:09:55","guid":{"rendered":"https:\/\/home.hamptonu.edu\/science\/?page_id=5799"},"modified":"2023-02-12T15:56:07","modified_gmt":"2023-02-12T20:56:07","slug":"aps-hull","status":"publish","type":"page","link":"https:\/\/home.hamptonu.edu\/science\/aps-hull\/","title":{"rendered":"APS &#8211; Hampton University Lidar Laboratory (HULL)"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"5799\" class=\"elementor elementor-5799\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-eb63406 elementor-section-full_width elementor-section-height-min-height elementor-section-stretched elementor-section-height-default elementor-section-items-middle\" data-id=\"eb63406\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;stretch_section&quot;:&quot;section-stretched&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-b1ed820\" data-id=\"b1ed820\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-4011475 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4011475\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-d820da5\" data-id=\"d820da5\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3dfce30 elementor-widget elementor-widget-spacer\" data-id=\"3dfce30\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bae1391 elementor-widget elementor-widget-heading\" data-id=\"bae1391\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Hampton University Lidar Laboratory (HULL)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-acf5f7b elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"acf5f7b\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-dca798f\" data-id=\"dca798f\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-fb34e97 elementor-widget elementor-widget-image\" data-id=\"fb34e97\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"874\" height=\"381\" src=\"https:\/\/home.hamptonu.edu\/science\/wp-content\/uploads\/sites\/47\/2023\/02\/hull2.png\" class=\"attachment-large size-large wp-image-5802\" alt=\"\" srcset=\"https:\/\/home.hamptonu.edu\/science\/wp-content\/uploads\/sites\/47\/2023\/02\/hull2.png 874w, https:\/\/home.hamptonu.edu\/science\/wp-content\/uploads\/sites\/47\/2023\/02\/hull2-300x131.png 300w, https:\/\/home.hamptonu.edu\/science\/wp-content\/uploads\/sites\/47\/2023\/02\/hull2-768x335.png 768w\" sizes=\"(max-width: 874px) 100vw, 874px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-b2174e6\" data-id=\"b2174e6\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-89c604d elementor-icon-list--layout-traditional elementor-list-item-link-full_width elementor-widget elementor-widget-global elementor-global-2794 elementor-widget-icon-list\" data-id=\"89c604d\" data-element_type=\"widget\" data-widget_type=\"icon-list.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ul class=\"elementor-icon-list-items\">\n\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/home.hamptonu.edu\/science\/atmospheric-planetary-sciences\">\n\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">APS Home<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/home.hamptonu.edu\/science\/aps-announcements\">\n\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">APS Announcements &amp; News<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/home.hamptonu.edu\/science\/aps-degree-programs\">\n\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">APS Graduate Program<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/cas.hamptonu.edu\/facilities\/\">\n\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">APS Facilities and Research<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/home.hamptonu.edu\/science\/aps-faculty-staff\">\n\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">APS Faculty &amp; Staff<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/home.hamptonu.edu\/science\/aps-seminar-series\/\">\n\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">APS Seminar Series<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/home.hamptonu.edu\/science\/aps-summer-program\">\n\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">APS Summer Program<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-5aac341 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"5aac341\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-533b396\" data-id=\"533b396\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5b5b9b0 elementor-widget elementor-widget-image\" data-id=\"5b5b9b0\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"731\" height=\"649\" src=\"https:\/\/home.hamptonu.edu\/science\/wp-content\/uploads\/sites\/47\/2023\/02\/hull3.png\" class=\"attachment-medium_large size-medium_large wp-image-5813\" alt=\"\" srcset=\"https:\/\/home.hamptonu.edu\/science\/wp-content\/uploads\/sites\/47\/2023\/02\/hull3.png 731w, https:\/\/home.hamptonu.edu\/science\/wp-content\/uploads\/sites\/47\/2023\/02\/hull3-300x266.png 300w\" sizes=\"(max-width: 731px) 100vw, 731px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-f84c0a3\" data-id=\"f84c0a3\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-fb07e50 elementor-widget elementor-widget-text-editor\" data-id=\"fb07e50\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The HU lidar located in the 4th floor of Turner Hall system consists of a zenith-viewing Nd:YAG laser that operates at three fixed wavelengths (1064, 532, and 355 nm), a 48-inch non-coaxial Cassegrainian-configured telescope receiver, a light separation system that uses beam splitters and interference filters, a detecting system including photomultiplier tubes (PMT) and avalanche photodiodes (APDs) and a Licel optical transient recorder. The system can be configured to measure elastic scattering from aerosols and clouds at the three laser output wavelengths, and at the same time measure Raman scattering excited by the 355-nm laser pulses. High-resolution (7.5 m) backscatter measurements extend from the boundary layer and free troposphere to the lower and middle stratosphere (~30 km). Recently, a tunable optical parametric oscillator (OPO) was incorporated into the lidar system. The OPO allows to optimize (tune) the wavelength choices and in that sense are better than fixed-frequency wavelength shifters such as Raman cells. The wavelength tuning range of our OPO is from 192 nm to 2750 nm. A steering mirror whose axis is aligned with a receiving telescope axis directs these laser outputs into the atmosphere. The laser backscatter is collected by a 48-inch diameter telescope and split into specific wavelength bands by a beam separation unit.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-c9b1fb8 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"c9b1fb8\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-5097645\" data-id=\"5097645\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1a5ae6d elementor-widget elementor-widget-text-editor\" data-id=\"1a5ae6d\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The beam separation combines filters and two blazed grating systems for dispersion of the return backscattering to various channels. Using filters and a grating system makes a beam-splitting system simple, compact, and easy to change or add other spectral channels for measurements. Wavelengths, for example, 288.38 nm, 299.5 nm, 300 nm, 407 nm, 386 nm, 532 nm and 1064 nm are focused to PMTs and APD and recorded by a Licel data-collecting system for measurements of aerosol, water vapor and ozone. Cimel Sunphotometer (NASA AERONET), Pandonia Spectrometer (NASA PANDORA), Inter-met Sounding System and ASSIST II Atmospheric Sounder Spectrometer, Lufft CHM15k Ceilometer and\u00a0 In-situ aerosol air sampler complement the vertical profiling capabilities of the lidar laboratory. A doppler Wind Lidar is occasionally available in a joint collaboration with the Army Research Laboratory. List of data products are listed.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-7d461b2\" data-id=\"7d461b2\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1e0dbde elementor-widget elementor-widget-image\" data-id=\"1e0dbde\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"668\" height=\"591\" src=\"https:\/\/home.hamptonu.edu\/science\/wp-content\/uploads\/sites\/47\/2023\/02\/hull1.png\" class=\"attachment-large size-large wp-image-5801\" alt=\"\" srcset=\"https:\/\/home.hamptonu.edu\/science\/wp-content\/uploads\/sites\/47\/2023\/02\/hull1.png 668w, https:\/\/home.hamptonu.edu\/science\/wp-content\/uploads\/sites\/47\/2023\/02\/hull1-300x265.png 300w\" sizes=\"(max-width: 668px) 100vw, 668px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Hampton University Lidar Laboratory (HULL) APS Home APS Announcements &amp; 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