Emirates Mars Ultraviolet Spectrometer's (EMUS) Predictions of Martian Airglow through Forward Modeling.
Abstract
This work revolves around the development of forward models for far-ultraviolet (FUV) emissions of O I 135.6 nm and CO 4PG from the Martian Thermosphere (MGITM) in aims of predicting the Emirates Mars Ultraviolet Spectrometer's (EMUS) observations. The model's inputs are based on the species' densities derived from the Mars Global Ionosphere-Thermosphere Model and photo-electron impact cross sections modeled to produce stimulation frequencies. The CO2 absorption effect has been reflected in the models as well. The models are sampled at around the homopause and the output are in form of brightness of O I 135.6 nm and CO 4PG across different observation geometry parameters. A simple model based on plane parallel approximation was developed as a reference to verify the accuracy of the OI 135.6 and CO 4PG (electron impact source) models. A comparison of the forward models and the simple model are analyzed through this work where several fitting methods were examined. In addition, the model results of CO 4PG bands' CO2+ dissociative recombination source will be presented and have been modeled using MGITM data as well as MAVEN Langmuir and Probe Waves (LPW)'s observed electron temperatures.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2018
- Bibcode:
- 2018AGUFM.P43K3901L
- Keywords:
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- 3346 Planetary meteorology;
- ATMOSPHERIC PROCESSESDE: 6225 Mars;
- PLANETARY SCIENCES: SOLAR SYSTEM OBJECTSDE: 5405 Atmospheres;
- PLANETARY SCIENCES: SOLID SURFACE PLANETSDE: 5445 Meteorology;
- PLANETARY SCIENCES: SOLID SURFACE PLANETS