Analysis of Imaging UltraViolet Spectrograph (IUVS) Observations of the Martian Disk at O135.6 nm with Implications for Emirates Mars Ultraviolet Spectrometer (EMUS) Data Analysis
Abstract
In preparation for the launch of Emirates Mars Mission in 2020, an analysis is conducted of observations made using the Mars Atmosphere and Volatile EvolutioN (MAVEN) Mission's Imaging Ultraviolet Spectrograph (IUVS) instrument and with an interpretation of the results in light of the Emirates Mars Ultraviolet Spectrometer (EMUS) data. In this analysis, empirical models of O135.6 nm emission are developed using IUVS observations of the disk of Mars. The models are tested and validated (using sigma, chi-squared curve and value, correlation and covariance matrices for fitting parameters) across multiple fitting routines, linear and non-linear, and numerous fitting functions based on our theoretical understanding of the Martian thermosphere. The models are developed based on IUVS level1c data files and account for variations in observational geometry parameters such as emission angle (EA), solar zenith angle (SZA) and planet distance from the Sun at the time of the observations. A discussion on the results of the sensitivity study for the estimated O135.6 nm brightness uncertainties is presented. The goal of this work is to develop and constrain the models using IUVS observations to prepare for optimal estimation routines for measurement uncertainties in the EMUS data.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2018
- Bibcode:
- 2018AGUFM.P43K3902D
- 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