Global-scale Observations of Limb and Disk (GOLD) disk measurements of; far ultraviolet molecular nitrogen band emissions are used to retrieve; column integrated disk temperatures (Tdisk), which are representative of; the lower-and-middle thermosphere. The present work develops a new; approach to assimilate the Tdisk in the Whole Atmosphere Community; Climate Model with thermosphereâeuro?ionosphere eXtension (WACCMX); using the Data Assimilation Research Testbed (DART) ensemble adjustment; Kalman filter. Nine days of data,1 to 9 November 2018, are assimilated.; Analysis state variables such as thermospheric effective temperature; (Teff, airglow layer integrated temperature), ratio of atomic oxygen to; molecular nitrogen column densities (O/N2), and column electron content; are compared with a control simulation that is only constrained up to; ~50 km. It is observed that assimilation of the GOLD; Tdisk improves the analysis states when compared with the control; simulation. The analysis and model states, particularly, Teff, O/N2, and; Electron Column Density (ECD) are also compared with their measurement; counterparts for a validation of the assimilation. Teff and O/N2 are; compared with GOLD Tdisk and O/N2. While, the ECD is compared with; ground based Total Electron Content (TEC) measurements from Global; Navigational Satellite System (GNSS) receivers. Root Mean Square Error; (RMSE) improvements in Teff and O/N2 are about 10.8% and 22.6%,; respectively. The RMSE improvement in analyses ECD is about 10%; compared to control simulation.
