Diurnal And Seasonal Variations Of Aerosol Optical
Depth At Jezero Crater, Mars
Michael D. Smith, Nasa Goddard Space Flight Center, Greenbelt, Md, Usa (Michael.D.Smith@Nasa.Gov),
G. M. Martínez, Lpi/Usra, Houston, Tx, Usa, E. Sebastián, V. Apéstigue, I. Arruego, D. Toledo Carrasco, D. Viúdez-Moreiras, J. A. Rodriguez-Manfredi, Centro De Astrobiología (Inta-Csic), Madrid, Spain,
M. T. Lemmon, Space Science Institute, Boulder, Co, Usa, M. De La Torre Juarez, Nasa Jet Propulsion Laboratory, Pasadena, Ca, Usa.

Introduction: The Two Upward-Looking Tirs
Sensors From The Meda Instrument Suite On-Board
The Perseverance Rover Enable The Retrieval Of Total
Aerosol Optical Depth (Dust Plus Water Ice Cloud)
Above The Rover For All Observations When Tirs Is
Taken. Because Tirs Observes In The Thermal-Ir, The
Retrievals Are Possible During Both The Day And Night
And Thus, They Provide An Excellent Way To Monitor
Both The Diurnal And Seasonal Variations Of Aerosols
Above Jezero Crater.

Tirs Data: The Thermal Infrared Sensor
(Tirs) Package On The Perseverance Rover Consists
Of Five Sensors Used To Characterize The Upward And