{"id":1266,"date":"2025-05-28T00:16:12","date_gmt":"2025-05-28T00:16:12","guid":{"rendered":"https:\/\/science.gsfc.nasa.gov\/stella\/?page_id=1266"},"modified":"2025-07-16T21:00:32","modified_gmt":"2025-07-16T21:00:32","slug":"stella-data","status":"publish","type":"page","link":"https:\/\/science.gsfc.nasa.gov\/stella\/about\/stella-data\/","title":{"rendered":"Data"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"1266\" class=\"elementor elementor-1266\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ff413bb e-flex e-con-boxed e-con e-parent\" data-id=\"ff413bb\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-00870e9 elementor-widget elementor-widget-heading\" data-id=\"00870e9\" 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\">STELLA Data<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9772ca4 elementor-widget elementor-widget-text-editor\" data-id=\"9772ca4\" 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 story is in the data!<\/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\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-30a41e7 e-flex e-con-boxed e-con e-parent\" data-id=\"30a41e7\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a95fc54 elementor-widget elementor-widget-heading\" data-id=\"a95fc54\" 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\">Data Types Collected by STELLA<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-70cee15 e-flex e-con-boxed e-con e-parent\" data-id=\"70cee15\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-d5b25f6 e-con-full e-flex e-con e-child\" data-id=\"d5b25f6\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-505b9d0 elementor-widget elementor-widget-text-editor\" data-id=\"505b9d0\" 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<h3>Spectral Data<\/h3><p class=\"mb-2 whitespace-pre-wrap\">STELLA instruments capture spectral measurements across various wavelengths (from visible to near-infrared):<\/p><ul><li>Visible and near-infrared irradiance at multiple wavelengths (250-940 nm)<\/li><li>Measurements in \u03bcW\/cm\u00b2<\/li><li>Raw counts and calibrated values<\/li><li>Multiple sensor types (AS7331, AS72651, AS72652, AS72653)<\/li><\/ul><h3>Environmental Data<\/h3><p class=\"mb-2 whitespace-pre-wrap\">Depending on the model and sensor package, STELLA can collect:<\/p><ul><li>Surface temperature (\u00b0C)<\/li><li>Air temperature (\u00b0C)<\/li><li>Relative humidity (%)<\/li><li>Barometric pressure (hPa)<\/li><li>Altitude data (m)<\/li><\/ul><h3>Air Quality Data (STELLA-AQ)<\/h3><p class=\"mb-2 whitespace-pre-wrap\">The STELLA-AQ variant measures:<\/p><ul><li>CO\u2082 concentration (ppm)<\/li><li>Particulate matter concentrations (1\u03bcm, 2.5\u03bcm, 10\u03bcm in \u03bcg\/m\u00b3)<\/li><li>Particle counts across multiple size ranges (0.3\u03bcm to 100\u03bcm)<\/li><li>Air Quality Index for particulates (AQIp)<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-dc209af e-con-full e-flex e-con e-child\" data-id=\"dc209af\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f090512 elementor-widget elementor-widget-text-editor\" data-id=\"f090512\" 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<h3>Data Format and Storage<\/h3><ul><li>Data is recorded to a micro SD memory card<\/li><li>CSV file format with comprehensive headers<\/li><li>Timestamp information in ISO8601 format<\/li><li>Metadata includes unique identifiers, batch numbers, and measurement sequences<\/li><\/ul><h3>Data Applications<\/h3><p class=\"mb-2 whitespace-pre-wrap\">STELLA data supports:<\/p><ul><li>Educational activities in K-12 and university settings<\/li><li>Field research for ecosystem monitoring<\/li><li>Natural resources inventories<\/li><li>Environmental quality surveys<\/li><li>Vegetation health assessment (NDVI &#8220;greenness&#8221;)<\/li><li>Custom applications through sensor adaptations<\/li><\/ul><h3>Data Visualization<\/h3><ul><li>Users can visualize and analyze their data in real-time using the STELLA dataviewer<\/li><li>Data can be easily exported for further analysis in other software<\/li><\/ul><h3>STELLA Variants and Their Data<\/h3><ul><li><strong>STELLA-1.1\/1.2<\/strong>: Full spectral and environmental data with touch-screen interface<\/li><li><strong>STELLA-2.0<\/strong>: Bluetooth connectivity for data transfer to smartphones<\/li><li><strong>STELLA-Q2<\/strong>: Simplified connector-based design (no soldering required)<\/li><li><strong>STELLA-AQ<\/strong>: Specialized for air quality measurements<\/li><li><strong>Helio-STELLA<\/strong>: Solar radiation focused measurements<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-9063d6d e-flex e-con-boxed e-con e-parent\" data-id=\"9063d6d\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6c1f682 elementor-widget elementor-widget-text-editor\" data-id=\"6c1f682\" 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 open-source nature of STELLA allows for customization of both hardware and data collection capabilities, making it an adaptable platform for a wide range of scientific and educational applications.<\/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\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-e11a3b3 e-flex e-con-boxed e-con e-parent\" data-id=\"e11a3b3\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4a92268 elementor-widget elementor-widget-heading\" data-id=\"4a92268\" 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<h4 class=\"elementor-heading-title elementor-size-default\">(STELLA-Q2, STELLA-1.1, STELLA-1.2 RS)<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1be6cfe e-flex e-con-boxed e-con e-parent\" data-id=\"1be6cfe\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-8f0f9b0 e-con-full e-flex e-con e-child\" data-id=\"8f0f9b0\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-525f211 elementor-widget__width-inherit elementor-widget elementor-widget-premium-addon-image-button\" data-id=\"525f211\" data-element_type=\"widget\" data-widget_type=\"premium-addon-image-button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\n\t\t<a class=\"premium-image-button-none premium-image-button premium-btn-sm premium-image-button-none\" href=\"https:\/\/science.gsfc.nasa.gov\/stella\/wp-content\/uploads\/2025\/07\/STELLA-1_1-SampleData.zip\">\n\t\t\t<div class=\"premium-image-button-text-icon-wrapper\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<svg class=\"premium-svg-nodraw premium-drawable-icon e-font-icon-svg e-fas-file-archive\" aria-hidden=\"true\" viewBox=\"0 0 384 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M377 105L279.1 7c-4.5-4.5-10.6-7-17-7H256v128h128v-6.1c0-6.3-2.5-12.4-7-16.9zM128.4 336c-17.9 0-32.4 12.1-32.4 27 0 15 14.6 27 32.5 27s32.4-12.1 32.4-27-14.6-27-32.5-27zM224 136V0h-63.6v32h-32V0H24C10.7 0 0 10.7 0 24v464c0 13.3 10.7 24 24 24h336c13.3 0 24-10.7 24-24V160H248c-13.2 0-24-10.8-24-24zM95.9 32h32v32h-32zm32.3 384c-33.2 0-58-30.4-51.4-62.9L96.4 256v-32h32v-32h-32v-32h32v-32h-32V96h32V64h32v32h-32v32h32v32h-32v32h32v32h-32v32h22.1c5.7 0 10.7 4.1 11.8 9.7l17.3 87.7c6.4 32.4-18.4 62.6-51.4 62.6z\"><\/path><\/svg>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t<span >\n\t\t\t\t\t\tDownload STELLA-1.1 SAMPLE DATA ZIP\t\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\n\t\t\t\n\t\t\t\n\t\t\t\n\t\t<\/a>\n\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-44c53ba e-con-full e-flex e-con e-child\" data-id=\"44c53ba\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9f147f4 elementor-widget__width-inherit elementor-widget elementor-widget-premium-addon-image-button\" data-id=\"9f147f4\" data-element_type=\"widget\" data-widget_type=\"premium-addon-image-button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\n\t\t<a class=\"premium-image-button-none premium-image-button premium-btn-sm premium-image-button-none\" href=\"https:\/\/science.gsfc.nasa.gov\/stella\/wp-content\/uploads\/2025\/07\/SQ2_sample_data.csv.zip\">\n\t\t\t<div class=\"premium-image-button-text-icon-wrapper\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<svg class=\"premium-svg-nodraw premium-drawable-icon e-font-icon-svg e-fas-file-archive\" aria-hidden=\"true\" viewBox=\"0 0 384 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M377 105L279.1 7c-4.5-4.5-10.6-7-17-7H256v128h128v-6.1c0-6.3-2.5-12.4-7-16.9zM128.4 336c-17.9 0-32.4 12.1-32.4 27 0 15 14.6 27 32.5 27s32.4-12.1 32.4-27-14.6-27-32.5-27zM224 136V0h-63.6v32h-32V0H24C10.7 0 0 10.7 0 24v464c0 13.3 10.7 24 24 24h336c13.3 0 24-10.7 24-24V160H248c-13.2 0-24-10.8-24-24zM95.9 32h32v32h-32zm32.3 384c-33.2 0-58-30.4-51.4-62.9L96.4 256v-32h32v-32h-32v-32h32v-32h-32V96h32V64h32v32h-32v32h32v32h-32v32h32v32h-32v32h22.1c5.7 0 10.7 4.1 11.8 9.7l17.3 87.7c6.4 32.4-18.4 62.6-51.4 62.6z\"><\/path><\/svg>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t<span >\n\t\t\t\t\t\tDownload STELLA-Q2 SAMPLE DATA ZIP\t\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\n\t\t\t\n\t\t\t\n\t\t\t\n\t\t<\/a>\n\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-3c38872 e-flex e-con-boxed e-con e-parent\" data-id=\"3c38872\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-eac1741 elementor-widget elementor-widget-text-editor\" data-id=\"eac1741\" 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>Some tips to collect good spectrometer data:<\/p><ul><li>Make sure the target area is away from your shadow. \u00a0To keep out of the shadow the STELLA 1.0 and 1.1 can have a 1\/2&#8243; dowel rod inserted into the tapered hole in the back of the casing so you can hold the instrument away from you.<\/li><li>Hold the instrument steady during its data collection.<\/li><li>Take good field notes such as the batch number, what the target is your measuring, weather and atmospheric conditions.<\/li><li>The angle and distance of the instrument from the target play a role in the measurements you receive. If the angle of the instrument is tilted it will have an effect on the measurements taken. The further away the instrument the larger the swath of area being measured.<\/li><\/ul><p>The data comes in as irradiance and the way to convert it to reflectance is by performing correct field calibrations.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bd23fcf elementor-widget elementor-widget-text-editor\" data-id=\"bd23fcf\" 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>STELLA spectrometer data is collected as a .csv (comma separated value) file on the micro SD card.<\/p><p>In individual sample (yellow) and continuous (blue) mode the data will be saved in batches on the data.csv file.<\/p><p>In sample and average (blue) mode the STELLA will take 20 measurements and put them into their own individual .csv file.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-499404a elementor-widget elementor-widget-image\" data-id=\"499404a\" 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=\"843\" height=\"163\" src=\"https:\/\/science.gsfc.nasa.gov\/stella\/wp-content\/uploads\/2025\/05\/STELLA_Data_savedfiles-1024x198.jpg\" class=\"attachment-large size-large wp-image-1270\" alt=\"\" srcset=\"https:\/\/science.gsfc.nasa.gov\/stella\/wp-content\/uploads\/2025\/05\/STELLA_Data_savedfiles-1024x198.jpg 1024w, https:\/\/science.gsfc.nasa.gov\/stella\/wp-content\/uploads\/2025\/05\/STELLA_Data_savedfiles-300x58.jpg 300w, https:\/\/science.gsfc.nasa.gov\/stella\/wp-content\/uploads\/2025\/05\/STELLA_Data_savedfiles-768x149.jpg 768w, https:\/\/science.gsfc.nasa.gov\/stella\/wp-content\/uploads\/2025\/05\/STELLA_Data_savedfiles-1536x297.jpg 1536w, https:\/\/science.gsfc.nasa.gov\/stella\/wp-content\/uploads\/2025\/05\/STELLA_Data_savedfiles.jpg 1820w\" sizes=\"(max-width: 843px) 100vw, 843px\" \/>\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<div class=\"elementor-element elementor-element-334a9f8 elementor-widget elementor-widget-text-editor\" data-id=\"334a9f8\" 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>Data collected by the STELLA spectrometers is separated by Universal Identification (UID), batch number, date and time.<\/p><p>STELLA-Q collects air temperature, relative humidity, barometric pressure, and irradiance (\u00b5W\/cm<sup>2<\/sup>) data between 450nm to 860nm.<\/p><p>STELLA-1.1 collects surface temperature, air temperature, relative humidity, barometric pressure, and irradiance (\u00b5W\/cm<sup>2<\/sup>) data between 450nm to 860nm. As well as optional height measurement data using Lidar.<\/p><p>STELLA-2 collects surface temperature, air temperature, relative humidity, barometric pressure, irradiance (\u00b5W\/cm<sup>2<\/sup>) between 450nm to 860nm, 3-axis acceleration (m\/s<sup>2<\/sup>), 3-axis angular rotation (\u00b0\/s), and 3-axis magnetic flux (\u03bcT) data.<\/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\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-c884485 e-flex e-con-boxed e-con e-parent\" data-id=\"c884485\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-bf79d35 elementor-widget elementor-widget-heading\" data-id=\"bf79d35\" 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\">STELLA Air Quality Data<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e566f28 elementor-widget elementor-widget-heading\" data-id=\"e566f28\" 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<h4 class=\"elementor-heading-title elementor-size-default\">(STELLA-AQ, STELLA-1.2 AA)<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-be4634d e-flex e-con-boxed e-con e-parent\" data-id=\"be4634d\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-094a79f e-con-full e-flex e-con e-child\" data-id=\"094a79f\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-081c817 elementor-widget__width-inherit elementor-widget elementor-widget-premium-addon-image-button\" data-id=\"081c817\" data-element_type=\"widget\" data-widget_type=\"premium-addon-image-button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\n\t\t<a class=\"premium-image-button-none premium-image-button premium-btn-sm premium-image-button-none\" href=\"https:\/\/science.gsfc.nasa.gov\/stella\/wp-content\/uploads\/2025\/07\/STELLA-AQ_SampleData.zip\">\n\t\t\t<div class=\"premium-image-button-text-icon-wrapper\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<svg class=\"premium-svg-nodraw premium-drawable-icon e-font-icon-svg e-fas-file-archive\" aria-hidden=\"true\" viewBox=\"0 0 384 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M377 105L279.1 7c-4.5-4.5-10.6-7-17-7H256v128h128v-6.1c0-6.3-2.5-12.4-7-16.9zM128.4 336c-17.9 0-32.4 12.1-32.4 27 0 15 14.6 27 32.5 27s32.4-12.1 32.4-27-14.6-27-32.5-27zM224 136V0h-63.6v32h-32V0H24C10.7 0 0 10.7 0 24v464c0 13.3 10.7 24 24 24h336c13.3 0 24-10.7 24-24V160H248c-13.2 0-24-10.8-24-24zM95.9 32h32v32h-32zm32.3 384c-33.2 0-58-30.4-51.4-62.9L96.4 256v-32h32v-32h-32v-32h32v-32h-32V96h32V64h32v32h-32v32h32v32h-32v32h32v32h-32v32h22.1c5.7 0 10.7 4.1 11.8 9.7l17.3 87.7c6.4 32.4-18.4 62.6-51.4 62.6z\"><\/path><\/svg>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t<span >\n\t\t\t\t\t\tDownload STELLA-AQ SAMPLE DATA ZIP\t\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\n\t\t\t\n\t\t\t\n\t\t\t\n\t\t<\/a>\n\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1f75863 e-con-full e-flex e-con e-child\" data-id=\"1f75863\" data-element_type=\"container\">\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-29dbeec e-flex e-con-boxed e-con e-parent\" data-id=\"29dbeec\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-981e1bb elementor-widget elementor-widget-text-editor\" data-id=\"981e1bb\" 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>STELLA air quality data is collected as a .csv (comma separated value) file on the micro SD card.<\/p><p>Data collected by the STELLA-AQ is separated by Universal Identification (UID), batch number, date and time.\u00a0<\/p><p>Measurement data it collects is air quality index for particulates, carbon dioxide in parts per million (ppm), air temperature, relative humidity, barometric pressure, and particle densities from 2.5\u00b5m and 10\u00b5m.\u00a0<\/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\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5895b4c e-flex e-con-boxed e-con e-parent\" data-id=\"5895b4c\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fa42a28 elementor-widget elementor-widget-heading\" data-id=\"fa42a28\" 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\">Helio Data<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e29da08 elementor-widget elementor-widget-heading\" data-id=\"e29da08\" 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<h4 class=\"elementor-heading-title elementor-size-default\">(Helio-STELLA)<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-189ad94 e-flex e-con-boxed e-con e-parent\" data-id=\"189ad94\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-822eeb8 e-con-full e-flex e-con e-child\" data-id=\"822eeb8\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8c34ba2 elementor-widget__width-inherit elementor-widget elementor-widget-premium-addon-image-button\" data-id=\"8c34ba2\" data-element_type=\"widget\" data-widget_type=\"premium-addon-image-button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\n\t\t<a class=\"premium-image-button-none premium-image-button premium-btn-sm premium-image-button-none\" href=\"https:\/\/science.gsfc.nasa.gov\/stella\/wp-content\/uploads\/2025\/07\/Helio-STELLA-2633_data.zip\">\n\t\t\t<div class=\"premium-image-button-text-icon-wrapper\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<svg class=\"premium-svg-nodraw premium-drawable-icon e-font-icon-svg e-fas-file-archive\" aria-hidden=\"true\" viewBox=\"0 0 384 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M377 105L279.1 7c-4.5-4.5-10.6-7-17-7H256v128h128v-6.1c0-6.3-2.5-12.4-7-16.9zM128.4 336c-17.9 0-32.4 12.1-32.4 27 0 15 14.6 27 32.5 27s32.4-12.1 32.4-27-14.6-27-32.5-27zM224 136V0h-63.6v32h-32V0H24C10.7 0 0 10.7 0 24v464c0 13.3 10.7 24 24 24h336c13.3 0 24-10.7 24-24V160H248c-13.2 0-24-10.8-24-24zM95.9 32h32v32h-32zm32.3 384c-33.2 0-58-30.4-51.4-62.9L96.4 256v-32h32v-32h-32v-32h32v-32h-32V96h32V64h32v32h-32v32h32v32h-32v32h32v32h-32v32h22.1c5.7 0 10.7 4.1 11.8 9.7l17.3 87.7c6.4 32.4-18.4 62.6-51.4 62.6z\"><\/path><\/svg>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t<span >\n\t\t\t\t\t\tDownload Helio-STELLA SAMPLE DATA ZIP\t\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\n\t\t\t\n\t\t\t\n\t\t\t\n\t\t<\/a>\n\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-e8bd7dc e-con-full e-flex e-con e-child\" data-id=\"e8bd7dc\" data-element_type=\"container\">\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2200f55 e-flex e-con-boxed e-con e-parent\" data-id=\"2200f55\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7bd2bae elementor-widget elementor-widget-text-editor\" data-id=\"7bd2bae\" 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>STELLA air quality data is collected as a .csv (comma separated value) file on the micro SD card.<\/p><h3>Spectral Data<\/h3><ul><li><strong>Multi-wavelength Solar Measurements<\/strong>: Helio-STELLA measures sunlight across different wavelengths of the electromagnetic spectrum, allowing users to see how solar radiation is distributed across visible and potentially near-infrared bands.<\/li><li><strong>Spectral Composition<\/strong>: The instrument can show the relative intensity of different wavelengths in sunlight, revealing its spectral signature.<\/li><\/ul><h3>Light Intensity Data<\/h3><ul><li><strong>Lux Measurements<\/strong>: As specifically mentioned, Helio-STELLA incorporates a &#8220;lux sensor&#8221; that can &#8220;assess light brightness,&#8221; providing quantitative measurements of solar intensity.<\/li><li><strong>Brightness Variations<\/strong>: These measurements can capture changes in overall solar radiation intensity throughout the day or under different atmospheric conditions.<\/li><\/ul><h3>Interactive Experiment Data<\/h3><ul><li><strong>Filter Effects<\/strong>: As described in testimonials, users can collect data showing &#8220;how different colors influence the electromagnetic spectrum&#8221; by placing various filters in front of the sensor.<\/li><li><strong>Comparative Readings<\/strong>: The instrument allows for before\/after or with\/without measurements to demonstrate how materials interact with solar radiation.<\/li><\/ul><h3>Associated Metadata<\/h3><ul><li><strong>Time and Date<\/strong>: Like other STELLA instruments, Helio-STELLA likely records timestamps with measurements to track temporal patterns.<\/li><li><strong>Batch Information<\/strong>: The STELLA platform generally assigns batch numbers to measurements for organizational purposes.<\/li><\/ul><p>\u00a0<\/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\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>STELLA Data The story is in the data! Data Types Collected by STELLA Spectral Data STELLA instruments capture spectral measurements across various wavelengths (from visible&hellip;<\/p>\n","protected":false},"author":2,"featured_media":1199,"parent":1373,"menu_order":3,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_lmt_disableupdate":"no","_lmt_disable":"","footnotes":""},"class_list":["post-1266","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Data - STELLA<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/science.gsfc.nasa.gov\/stella\/about\/stella-data\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Data - STELLA\" \/>\n<meta property=\"og:description\" content=\"STELLA Data The story is in the data! 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