Observations

Rosetta Stone Eclipse Campaign

(Right to left) FLIR camera, PolarCam, and Avantes flash spectra

HAO scientists observed the August 21st total eclipse with a suite of three instruments with financial assistance provided by NASA.

A TRMM/GPM retrieval of the total mean generator current for the global electric circuit

Global mean distribution of Wilson current for the GEC (1.6 kA total)
Monday, October 16, 2017

A specialized satellite version of the passive microwave electric field retrieval algorithm (Peterson et al., 2015) is applied to observations from the Tropical Rainfall Measuring Mission (TRMM) and Global Precipitation Measurement (GPM) satellites to estimate the generator current for the Global

The NASA Ionospheric Connection Explorer (ICON) Mission

Variation of NmF2 log 10 [1/cm3] for different seasons
Wednesday, April 26, 2017

The NASA Ionospheric Connection explorer (ICON) will study the coupling between the thermosphere and ionosphere at low- and mid-latitudes by measuring the key parameters.

Gravity wave variation from the troposphere to the lower thermosphere during a stratospheric sudden warming event: A case study

Vertical energy flux
Monday, April 3, 2017

High resolution Whole Atmosphere Community Climate Model (WACCM) simulations are used to study how gravity waves vary during a stratospheric sudden warming (SSW) event from the source region to the lower thermosphere.

A study of large wind shears near the mesopause and the tropopause

Vertical profiles of maximum wind shear
Friday, March 31, 2017

The NCAR Whole Atmosphere Community Climate Model (WACCM), with a quasi-uniform horizontal resolution of $\sim$25km and a vertical resolution of 0.1 scale height, produces large horizontal winds and vertical shears maximizing in the mesosphere and lower thermosphere (MLT), similar to those found

DKIST: Solar Physics in Service of Society

Phil Judge, Claire Raftery, Sarah Jaeggli

Philip Judge, Senior Scientist at HAO, Claire Raftery, Director of Education and Outreach at NSO HQ in Boulder, and Sarah Jaeggli, Assistant Astronomer at the NSO's Daniel K Inouye Solar Observatory in Maui were guests on KGNU public radio in Boulder, CO.

The properties of optical lightning flashes and the clouds they illuminate

properties of optical lightning flashes and the clouds they illuminate
Friday, November 18, 2016

Optical lightning sensors like the Optical Transient Detector and Lightning Imaging Sensor (LIS) measure total lightning across large swaths of the globe with high detection efficiency.

The Design and Performance of the Gondola Pointing System for the Sunrise II Balloon-Borne Stratospheric Solar Observatory

Schematic of the Sunrise Gondola
Friday, November 4, 2016

At one meter, the Sunrise Balloon-Borne Stratospheric Solar Observatory is the largest solar telescope to leave the earth. Its aim during its June 12 to June 17, 2013 flight was to study the magneto-convective processes of the sun at a resolution of better than 100 km.

Effects of Magnetospheric Lobe Cell Convection on Dayside Upper Thermospheric Winds at High Latitudes

Average ionospheric potential and DMSP F-16 ion drift observations
Tuesday, October 4, 2016

This paper investigates a possible physical mechanism of the observed dayside high-latitude upper thermospheric wind using numerical simulations from the coupled magnetosphere-ionosphere-thermosphere (CMIT) model.

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