THIS PROPOSED WORK IS RELEVANT TO THE MARS DATA ANALYSIS PROGRAM DUE TO ITS FOCUS ON THE ANALYSIS OF PRE-EXISTING PUBLICLY AVAILABLE MISSION DATA AS WELL AS ITS USE OF REFLECTIVITY MODELING TO SIGNIFICANTLY ENHANCE AND FACILITATE THE INTERPRETATION OF THAT DATA. THIS WORK WILL PRIMARILY INVOLVE ANALYSIS OF SHARAD DATA FROM THE MRO MISSION THAT IS PUBLICLY AVAILABLE ON THE PLANETARY DATA SYSTEM (PDS). THE PRIMARY DATA ANALYSIS TASK OF THIS PROPOSAL WILL INVOLVE USING A COMBINATION OF SHARAD REFLECTIVITY MEASUREMENTS AND A THIN LAYER REFLECTION MODEL TO ESTIMATE THE DUST CONTENT OF INDIVIDUAL LAYERS OR LAYER PACKETS RESPONSIBLE FOR SHARAD REFLECTIONS IN THE NPLD. THIS PROCEDURE HAS BEEN VALIDATED IN PREVIOUS WORK BUT ITS APPLICATION WAS LIMITED TO SHALLOW REFLECTIONS AT A SMALL NUMBER OF ISOLATED STUDY SITES. IN THIS WORK MAP RADAR REFLECTIVITY IS PROPOSED OVER AN EXTENSIVE AREA OF THE NPLD KNOWN AS THE SADDLE REGION USING SHARAD RADARGRAMS. THE SADDLE REGION IS NOTABLE FOR ITS RELATIVE LACK OF SPIRAL TROUGHS AND ITS FLAT SURFACE FACTORS WHICH LIMIT THE IMPACT OF CERTAIN TYPES OF NOISE THAT MAKE SUBSURFACE MAPPING DIFFICULT IN OTHER REGIONS OF THE NPLD. WHILE EXISTING STUDIES OF THE AREA MAPPED ONLY A HANDFUL OF SHALLOW REFLECTORS THE PLAN IS TO MAP EACH REFLECTOR FROM THE SURFACE TO THE BASAL UNIT IN ORDER TO CREATE THE FIRST RECORD OF ICE AND DUST ACCUMULATION THAT SPANS THE ENTIRE HISTORY OF THE NPLD. ALSO THIS PROPOSAL WILL ADDRESS SOME LIMITATIONS OF THE REFLECTIVITY MODEL PREVIOUSLY USED FOR DATA INVERSION. TYPICALLY STUDIES HAVE ASSUMED REFLECTIONS ARE THE RESULT OF A SINGLE LAYER WITH POORLY CONSTRAINED THICKNESS. FOR THIS WORK A PREVIOUSLY DEVELOPED ADVANCED PROCESSING TECHNIQUE CALLED SUPER-RESOLUTION WILL BE USED WHICH CAN IMPROVE RANGE RESOLUTION BY UP TO A FACTOR OF THREE. THIS WILL ALLOW TIGHTER CONSTRAINTS ON LAYER THICKNESS AND THUS PRODUCE MORE ACCURATE ESTIMATES OF DUST CONTENT. THE PLAN IS TO ALSO EXPAND THE REFLECTIVITY MODEL TO INCLUDE SCENARIOS WHERE REFLECTIONS ARE CAUSED NOT BY A SINGLE LAYER BUT BY PACKETS OF LAYERS THINNER THAN THE RADAR RESOLUTION.