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First Observations of Gigantic Jets From Geostationary Orbit
Author(s) -
Boggs Levi D.,
Liu Ningyu,
Peterson Michael,
Lazarus Steven,
Splitt Michael,
Lucena Frankie,
Nag Amitabh,
Rassoul Hamid K.
Publication year - 2019
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2019gl082278
Subject(s) - geostationary orbit , azimuth , satellite , physics , geostationary operational environmental satellite , pixel , trajectory , ionosphere , storm , remote sensing , flash (photography) , meteorology , geology , geophysics , optics , astronomy
Here we report the first observations of gigantic jets (GJs) by the Geostationary Lightning Mapper (GLM) on board the Geostationary Operational Environmental Satellite‐R series. Fourteen GJs produced by Tropical Storm Harvey on 19 August 2017 were observed by both GLM and a ground‐based low‐light‐level camera system. The majority of the GJs produced distinguishable signatures in the GLM data, which include long continuous emissions, large peak flash optical energies, and small lateral propagation distances in comparison with other flashes observed by GLM. For two GJs with the best ground‐based images, each have a single pixel that contains the largest optical energy throughout the duration of the GJ and also coincides with the azimuth of the GJ from the video images. The optical energy of the pixel increases as the GJ propagates upward, reaches its peak when the GJ connects to the ionosphere, and then fades away.