Correction and calibration of atmospheric impact observations in GOES GLM dataOPEN ACCESS 

· by · in ,

Robert L. Morris, Jeffrey Claiborne Smith, Jessie L. Dotson, Eric C. Stern, Randolph S. Longenbaugh

MAPS
Version of Record online: 24 November 2022

LINK (OPEN ACCESS)
PDF (OPEN ACCESS)

“The Earth’s atmosphere is impacted daily by both meteoroids and artificial objects. Calibrated observations of the emitted light at sufficiently high sampling rates can enable or improve the estimation of impactor attributes such as size, cohesion, trajectory, and composition, but are difficult to obtain owing to the unpredictability, brevity, and high dynamic (brightness) range of impacts. Ground-based camera systems have successfully monitored small regions of the atmosphere at video frame rates and with limited radiometric capabilities, but most impacts occur over the 70% of the Earth’s surface covered by water and are therefore missed by these networks. The Geostationary Lightning Mapper (GLM) instruments aboard Geostationary Operational Environmental Satellites 16 and 17 provide near-hemispherical coverage at 500 frames per second. These data have been shown to contain the signatures of many independently confirmed impacts, often from both viewing angles simultaneously, and constitute an observational resource that is currently unparalleled in the public domain. NASA’s Asteroid Threat Assessment Project has implemented an automated impact detection pipeline that processes data from GLM daily. Given a detected impact, the GLM data contain a wealth of information for use in quantitative follow-up analyses. However, impact events differ from lightning in ways that violate key assumptions built into GLM’s design. The result is that GLM’s onboard processing introduces errors into pixel observations of impact events and the calibrated energies near the periphery of the detector may be substantially overestimated. We present methods for mitigating these and other issues to produce a data product more suitable for impact analyses than the existing GLM lightning product.”

Related posts (automatically generated):

  1. Oxygen line in fireball spectra and its application to satellite observationsOPEN ACCESS 
  2. Infrasound signals of fireballs detected by the Geostationary Lightning MapperOPEN ACCESS 
  3. Preatmospheric Detection of a Meter-sized Earth ImpactorOPEN ACCESS 
  4. The Manifold Of Variations: impact location of short-term impactorsOPEN ACCESS 
  5. On the capture of small stony asteroids into Earth orbit by atmospheric grazing
  6. Review of synergic meteor observations: linking the results from cameras, ionosondes, infrasound and seismic detectors
  7. High precision meteor observations with the Canadian Automated Meteor Observatory — Data reduction pipeline and application to meteoroid mechanical strength measurementsOPEN ACCESS 
  8. Data on 824 fireballs observed by the digital cameras of the European Fireball Network in 2017–2018. I. Description of the network, data analysis, and the catalogOPEN ACCESS 
  9. Data on 824 fireballs observed by the digital cameras of the European Fireball Network in 2017-2018. II. Analysis of orbital and physical properties of cm-sized meteoroidsOPEN ACCESS 
  10. Experimentally Derived Luminous Efficiencies for Aluminum and Iron at Meteoric SpeedsOPEN ACCESS 
Tags: , , , ,