ASDC | DSCOVR_EPIC_L2_O3SO2AI

DSCOVR Level 2

Entry Title: DSCOVR EPIC L2 Ozone (O3), Sulfur Dioxide (SO2) Aerosol Index (AI) with Epic L1B V03 Input, Version 1

Entry ID: DSCOVR_EPIC_L2_O3SO2AI_01

Aerosols Clouds Radiation Budget

Description

Robust cloud products are critical for DSCOVR to make a significant contribution to climate studies. Building on our team’s track-record in cloud detection, cloud property retrieval, oxygen band exploitation, and DSCOVR-related studies, we propose to develop a suite of algorithms for generating the operational EPIC cloud mask, cloud height and cloud optical thickness products. Multichannel observations will be used for cloud masking; the cloud height will be developed with information from the oxygen A- and B- band pairs (780 nm vs. 779.5 nm and 680 nm vs. 687.75 nm); for the cloud optical thickness retrieval, we propose an approach that combines the EPIC 680 nm observations and numerical weather model outputs. Preliminary results from radiative transfer modeling and from proxy data applications show that the proposed algorithms are viable.

Product validation will be conducted by comparing EPIC observations/retrievals with counterparts from coexisting Low Earth Orbit (LEO) and Geosynchronous Earth Orbit (GEO) satellites. The proposed work will include a rigorous uncertainty analysis based on theoretical and computational radiative transfer modeling that complements standard validation activities with physics-based diagnostics. We also plan to evaluate and improve the calibration of the EPIC O2 A- and B-band absorption channels through tracking the instrument performance over known targets, such as cloud free ocean and ice sheet surfaces.

The deliverables for the proposed work include an Algorithm Theoretical Basis Document (ATBD) for peer-review, products generated with the proposed algorithms and supporting research articles. The data products, which will be archived at the Atmospheric Science Data Center (ASDC) at the NASA Langley Research Center, will provide essential inputs needed for the community to apply EPIC observations to climate research and to better interpret NISTAR observations.

The proposed work directly responds to the solicitation to “develop and implement the necessary algorithms and processes to enable various data products from EPIC sunrise to sunset observations once on orbit”, and also for improving “the calibration of EPIC based on in-flight data”.

DOI

10.5067/EPIC/DSCOVR/L2_O3SO2AI.001

Publications which Cite this Collection

Yang, Kai; Liu, Xiong (2017). Ozone profile climatology for remote sensing retrieval algorithms.

VIEW RELATED INFORMATION

ALGORITHM DOCUMENTATION

EPIC Geolocation and Color Imagery Algorithm Revision 5 July 5, 2017

DATA CITATION POLICY

How to cite ASDC data

GENERAL DOCUMENTATION

INSTRUMENT/SENSOR CALIBRATION DOCUMENTATION

EPIC level 1 A & B Calibration factors table

MICRO ARTICLE

PROCESSING HISTORY

EPIC Data Format Control Book Specification July 1, 2016

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

REQUIREMENTS AND DESIGN

DSCOVR Earth Science Instrument Overview

USER FEEDBACK PAGE

NASA Goddard Twitter Page

From GCMD Science Keywords:

ATMOSPHERIC OZONE > OXYGEN COMPOUNDS
SULFUR COMPOUNDS
AIR QUALITY
ATMOSPHERIC CHEMISTRY
OXYGEN COMPOUNDS
SULFUR DIOXIDE > SULFUR COMPOUNDS

Aerosol Index (AI)
Reflectivity At 340 nm
Vertical Column of Ozone (O3)
Vertical Column of Sulfur Dioxide (SO2)

Data Distribution

Current Products

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Spatial Information

Spatial Coverage: (S: -90, N: 90), (W: -180, E: 180)
Spatial Coverage Type: Not provided
Longitude Resolution: 20 km
Latitude Resolution: 20 km
Coordinate System: Geodetic
Granule Spatial Representation: Cartesian

Locations

CONTINENT AFRICA ANTARCTICA ASIA AUSTRALIA/NEW ZEALAND EUROPE NORTH AMERICA SOUTH AMERICA ARCTIC EASTERN HEMISPHERE EQUATORIAL EURASIA GLOBAL GLOBAL LAND GLOBAL OCEAN MID-LATITUDE NORTHERN HEMISPHERE OCEANIA POLAR SAHEL SOUTHERN HEMISPHERE TROPICS WESTERN HEMISPHERE OCEAN ARCTIC OCEAN ATLANTIC OCEAN INDIAN OCEAN PACIFIC OCEAN SOUTHERN OCEAN TROPOSPHERE STRATOSPHERE

Temporal Information

Temporal Coverage: 2015-06-12 - 2021-12-31
Temporal Resolution: 12 to 23 images per day

Platforms

Solar/Space Observation Satellites

DSCOVR

Deep Space Climate Observatory

EPIC

Earth Polychromatic Imaging Camera

Metadata Dates

Created on 2017-06-13

Last updated on 2021-11-03