gov.noaa.ncei.swx:gong_oHA dataset NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact NCEI Contact Information Information for contacts at NCEI. information pointOfContact 2021-12-20T17:49:30 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Global Oscillation Network Group (GONG) H-alpha Outputs (oHA) Processed GONG H-alpha Near-Real-Time SWx Data 2018-06-14 publication NCEI Digital Catalog NCEI DSI: 2061_01 NOAA National Centers for Environmental Information NCEI Metadata ID: gov.noaa.ncei.swx:gong_iQR Marble, Andy author NOAA/NWS Space Weather Prediction Center author NOAA National Centers for Environmental Information publisher Originally constructed in 1995, the Global Oscillation Network Group (GONG) is a network of six identical ground-based solar telescopes distributed around the Earth in order to obtain continuous observations of the Sun. Those sites are located in Big Bear, California (BB); Mauna Loa, Hawaii (ML); Learmonth, Australia (LE); Udaipur, India (UD); El Teide, Spain (TD); and Cerro Tololo, Chile (CT). Additionally, there are three engineering/testbed sites in Boulder, Colorado (TC, TE, and TS). Owned by the National Science Foundation, GONG is operated and maintained by the National Solar Observatory (NSO) with significant funding from NOAA’s Space Weather Prediction Center (SWPC). Each minute, weather permitting, the GONG network observes the Sun at two spectral wavelengths: 676.78nm (a Ni I absorption line) and 656.28nm (the H-alpha absorption line). The H-alpha images are used for near-real-time space weather monitoring of dynamic activity in the Sun’s chromosphere, such as solar flares. onGoing NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact NCEI Contact Information Information for contacts at NCEI. information pointOfContact William Rowland National Centers for Environmental Information (NCEI) / Space Weather Prediction Center (STP) Systems Engineer william.rowland@noaa.gov pointOfContact Andy Marble National Weather Service (NWS) National Oceanic and Atmospheric Administration (NOAA) / National Weather Service (NWS) andrew.marble@noaa.gov resourceProvider Laurel Rachmeler National Centers for Environmental Information (NCEI) / Space Weather Prediction Center (STP) STP Section Manager Laurel.Rachmeler@noaa.gov custodian continual https://www.ncei.noaa.gov/themes/custom/ncei/logo.svg NOAA logo SVG EARTH SCIENCE > SUN-EARTH INTERACTIONS > IONOSPHERE/MAGNETOSPHERE DYNAMICS > MAGNETIC FIELDS/MAGNETIC CURRENTS theme Global Change Master Directory (GCMD) Science Keywords 2024 revision 19 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2024. GCMD Keywords, Version 19. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian GONG NETWORK > Global Oscillation Network Group platform Global Change Master Directory (GCMD) Platform Keywords 2020-01-09 publication 9.1 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2024. GCMD Keywords, Version 19. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian GONG INSTRUMENT > Global Oscillation Network Group Instrument GONG NETWORK > Global Oscillation Network Group Network instrument Global Change Master Directory (GCMD) Instrument Keywords 2020-01-09 publication 9.1 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2024. GCMD Keywords, Version 19. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian GONG > Global Oscillation Network Group project Global Change Master Directory (GCMD) Project Keywords 2020-01-09 publication 9.1 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2024. GCMD Keywords, Version 19. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2020-01-09 publication 9.1 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2024. GCMD Keywords, Version 19. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian EARTH SCIENCE > SUN-EARTH INTERACTIONS > SOLAR ACTIVITY > SOLAR FLARES theme Global Change Master Directory (GCMD) Science Keywords 2024 revision 19 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2024. GCMD Keywords, Version 19. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian otherRestrictions otherRestrictions Cite as: NOAA/NWS Space Weather Prediction Center (2022): Global Oscillation Network Group (GONG) H-alpha Outputs (oHA). [indicate subset used]. NOAA National Centers for Environmental Information. NCEI DSI 2061_01. Accessed [date]. otherRestrictions Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives. otherRestrictions Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose. eng; USA climatologyMeteorologyAtmosphere non-geographic dataset true -180 180 -90 90 2022-01-01 NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact NCEI Contact Information Information for contacts at NCEI. information pointOfContact In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media. 2021-12-31T12:00:00 Contact NCEI for other distribution options and instructions. ASCII tar FITS tar JPEG tar JP2K tar https://www.ncei.noaa.gov/metadata/geoportal/rest/metadata/item/gov.noaa.ncei.swx:gong_iQR/html/ HTTPS Metadata Landing Page information https://www.ncei.noaa.gov/contact HTTPS Web Browser NCEI Customer Support This dataset is not currently available for public download from NCEI. Please contact NCEI to place a request for access to these data. or This dataset is not available for public download from NCEI. Please contact NCEI to request access to the data. offlineAccess dataset Following decompression at the central processing location, each GONG Hα image is sharpened by convolution, and the location of the limb is determined using a maximum-gradient limb fitter. The image is then rotated so that solar North points up and the east limb is on the left side of the image. The corresponding rotation angle is based on ephemeris data plus historically measured alignment corrections, with an estimated accuracy of approximately 1 degree. Next, the image is scaled to normalize the central intensity and remapped to ensure a circular solar disk with a fixed radius of 900 pixels. At this point, the final FITS (haf) file is written and compressed using the fpack method. Prior to generating JPEG images, wavelet transformation is applied to reduce limb darkening effects and increase the visibility of both on-disk detail and off-limb prominences. Three sizes of JPEGs are created: 2048 x 2048 full-resolution (hag), 512 x 512 half-resolution (hav), and 307 x 307 low-resolution (has) images. asNeeded