Description

DSCOVR_EPIC_L2_TO3_v03 is Level2 Total Ozone derived from the Deep Space Climate Observatory (DSCOVR) Earth Polychromatic Imaging Camera (EPIC) using Level 1b version 3 inputs and version 3 ozone retrieval algorithm. The measurements from four EPIC UV channels are used to derive the global distributions of total ozone over the entire sunlit portion of the Earth. A new soft calibration technique developed based on scene matching with OMPS gives calibrated EPIC radiances. The calibrated EPIC radiances are used to derive science-quality total ozone products from EPIC that are consistent with those from other UV instruments. The retrieval algorithm uses wavelength triplets and assumes that the scene reflectivity changes linearly with wavelength. Version 3 algorithm includes several key modifications aimed to improve total ozone retrievals: a) switch to Version 3 Level 1b product with improved geolocation registration, flat field and dark counts corrections; b) replace OMI based cloud height climatology with the simultaneous EPIC A-Band cloud height; c) update absolute calibrations using polar orbiting SNPP OMPS; d) add corrections for ozone profile shape and temperature; e) update algorithm and error flags to filter data; f) add column weighting functions for each observation to facilitate error analysis. EPIC ozone retrievals accurately capture short term synoptic changes in total column ozone. With EPIC measurements from DSCOVR's vantage point synoptic ozone maps can be derived every 1-2 hours. Scene Reflectivity (clouds, aerosols, and surface) is derived as part of the ozone retrieval. The scene reflectivity in conjunction with ozone has been used to derive the amount of UV solar radiation reaching the ground, and surface UV Erythemal is also reported in these files.

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Resources and Documentation

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VIEW RELATED INFORMATION

DATA CITATION POLICY

• How to cite ASDC data

GENERAL DOCUMENTATION

• ASDC Data and Information for DSCOVR
• EPIC O3 Product Overview
• Earth Observation Portal Page for DSCOVR Mission Information

MICRO ARTICLE

• NASA Captures "EPIC" Earth Image Article from July 20, 2015
• NASA Studies High Clouds, Saharan Dust from EPIC View
• New York Times Blog "From a Million Miles Away, a New NASA ‘Blue Marble’ View of Earth" By Andrew C. Revkin

PUBLICATIONS

• A New Blue Marble By Scott Kelly, NASA Astronaut
• Discover Article "The U.S. Deep Space Climate Observatory just sent back its first view of our home world, and it’s a beauty." By Robinson Meyer, July 20, 2015
• NASA Earth Observatory Article: 2016 Tournament Earth Champion: The Dark Side of the Moon - The images were acquired by the Earth Polychromatic Imaging Camera (EPIC) on the DSCOVR satellite
• NASA Earth Observatory Article: An EPIC Eclipse: Natural Hazards - The Deep Space Climate Observatory (DSCOVR) was built to provide a distinct perspective on our planet.
• NASA Earth Observatory Article: An EPIC New View of Earth: Image of the Day - From one million miles away, the DSCOVR satellite returned its first view of the entire sunlit side of Earth
• NASA Earth Observatory Article: April : 2016 : Earth Matters : Blog - The images were acquired by the Earth Polychromatic Imaging Camera (EPIC) on the DSCOVR satellite
• NASA Earth Observatory Article: Keeping on the Sunny Side of Earth
• NASA Earth Observatory Article: Plumes From Africa's Volcanic Duo: Image of the Day - Located near the equator in central Africa, the Nyamuragira and Nyiragongo volcanoes are often obscured from satellite view by clouds
• NASA Earth Observatory Article: Seeing Through the Smoky Pall: Observations from a Grim Indonesian Fire Season - The Earth Polychromatic Imaging Camera aboard the DSCOVR satellite acquired this view of smoke drifting over the region.
• NASA Earth Observatory Article: Space Debris: Image of the Day - Low and High Earth Orbital Debris Images
• NASA Earth Observatory Article: The Dark Side and the Bright Side: Image of the Day - A NASA camera aboard the Deep Space Climate Observatory (DSCOVR) has captured a unique view of the Moon as it passed between the spacecraft and Earth
• NASA Earth Observatory Article: The Legacy of Nimbus: Image of the Day - No Longer Just for Astronauts
• NASA Earth Observatory Article: Up, Up, and Away for DSCOVR - The journey has been a long one for the Deep Space Climate Observatory (DSCOVR)
• NASA Earth Observatory Article: Zaatari Refugee Camp, Jordan: Image of the Day
• NASA Leadership Blog, DSCOVR’s First Light on the Future by Buzz Aldrin
• The Atlantic Article "Al Gore Dreamed Up a Satellite—and It Just Took Its First Picture of Earth: The U.S. Deep Space Climate Observatory just sent back its first view of our home world, and it’s a beauty." By Robinson Meyer, July 20, 2015

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