THIS PROPOSAL UTILIZES A TERRESTRIAL ANALOG SITE FOR ICY SATELLITES TO DETERMINE HOW A SINGLE-STATION SEISMOMETER CAN CONSTRAIN CYROSPHERIC CHARACTERISTICS. ICY WORLDS HAVE SEISMICALLY ACTIVE ICY SHELLS COVERING POTENTIALLY HABITABLE SUBSURFACE OCEANS. SEISMOLOGY IS THE PREEMINENT APPROACH FOR DETERMINING THE CHARACTERISTICS OF THE ICY SHELL NAMELY ITS THICKNESS. A SINGLE-STATION SEISMOMETER WOULD BE AN ECONOMIC AND EFFICIENT PAYLOAD FOR FUTURE LANDER MISSIONS. A TERRESTRIAL ANALOG SITE IS USED TO INVESTIGATE THE DATA AND ANALYSIS APPROACHES. WHILE THERE IS NO PERFECT EUROPAN ANALOG ON EARTH WE SELECTED AN ANALOG SITE THAT IS ACCESSIBLE WELL-STUDIED HAS A THICK ICE LAYER AND HAS IDEAL PASSIVE SOURCES. THE GULKANA GLACIER IS LOCATED ABOUT 200KM FROM FAIRBANKS ALASKA AND IS CONSIDERED "BENCHMARK" GLACIER BY THE USGS BECAUSE METEOROLOGICAL MASS BALANCE AND STREAM FLOW MEASUREMENTS HAVE BEEN RECORDED FOR SEVERAL DECADES. GULKANA HAS AN ICE LAYER THAT IS TENS TO HUNDREDS OF METERS THICK. WHILE THE GLACIER'S ICE THICKNESS IS MUCH THINNER THAN EUROPA'S ICY SHELL THE PASSIVE SEISMIC SOURCES INCLUDING ICE-QUAKES AND WATER DRAINAGE MIMIC THOSE OF EUROPA. IN SEPTEMBER 2017 THE SEISMIC INVESTIGATION OF ICE AND OCEAN STRUCTURES (SIIOS) WAS DEPLOYED ON GULKANA. SIIOS CONSISTS OF 19 SEISMIC INSTRUMENTS IN A SMALL (<5M ACROSS) ARRAY. MY RESEARCH FOCUSES ON TWO DIFFERENT INSTRUMENTS COUPLED TO THE GROUND AS WELL AS ONE SEISMOMETER THAN WAS PLACED ON A TABLE ABOVE THE OTHER TWO. MY FIRST TASK WILL USE THE ACTIVE SOURCE EXPERIMENT TO INVESTIGATE THE INTERIOR STRUCTURE OF THE GLACIER. THE ACTIVE SOURCE EXPERIMENT PROVIDES PRECISE EVENT TIMES AND LOCATIONS WHICH CAN BE USED TO INVERT FOR THE GLACIER'S STRUCTURE. A BAYESIAN INVERSION ALGORITHM IS USED TO DETERMINE PROBABLE STRUCTURES FROM THE ARRIVAL TIMES OF TWO BODY WAVES THE COMPRESSIONAL (P) AND SHEAR (S) WAVES. A SECOND BAYESIAN CODE WILL ATTEMPT TO LOCATE THE KNOWN EVENTS TO DETERMINE THE SEISMOMETERS' LOCATION EFFICACIES. THE SECOND TASK WILL ATTEMPT TO IDENTIFY UNKNOWN PASSIVE SOURCES SUCH AS ICEQUAKES AND WATER DRAINAGE EVENTS. I WILL USE THE FREQUENCIES AND DURATION OF THE SEISMIC SIGNALS TO BUILD A CATALOG OF EVENTS. THE FREQUENCIES OF THE EVENTS CAN BE DETERMINED BY CALCULATING THE FOURIER-TRANSFORM AND POWER SPECTRUM DENSITY OF SMALL SECTIONS OF THE TIME-SERIES. I CAN ALSO USE MY LOCATION ALGORITHM DEVELOPED IN THE FIRST TASK TO LOCATE THE UNKNOWN EVENTS. THE LAST TASK WILL BE TO TRANSLATE MY ALGORITHMS TO EUROPA. I WILL BUILD A CATALOG OF LARGE TELESEISMIC EVENTS (MOMENT MAGNITUDES ~5.3) SMALLER ICEQUAKES AND REGIONAL WATER DRAINAGE EVENTS. AN ALGORITHM WILL RANDOMLY SELECT EVENTS FROM THIS CATALOG AND BUILD A PLAUSIBLE TIME-SERIES OF SEISMIC EVENTS. BACKGROUND NOISE WILL BE ADDED TO THE TIME-SERIES USING FREELY AVAILABLE NOISE SIGNALS FROM PREVIOUS STUDIES. I WILL ATTEMPT TO IDENTIFY AND LOCATE THE EVENTS AND THEN COMPARE MY RESULTS TO THE SELECTED EVENTS TO DETERMINE THE ACCURACY OF MY APPROACH. EACH TASK WILL TAKE ABOUT SEVEN MONTHS TO COMPLETE SO THE ENTIRE PROJECT CAN BE COMPLETED IN TWO YEARS. EACH YEAR I WILL PRESENT MY WORK AT THE AMERICAN GEOPHYSICAL UNION (AGU) AND THE LUNAR AND PLANETARY SCIENCE CONFERENCE (LPSC). AFTER EACH TASK IS COMPLETE I WILL PUBLISH THE RESULTS IN A PEER-REVIEWED JOURNAL. THIS WORK IS HIGHLY RELEVANT TO NASA OBJECTIVES AND THE CALL FOR THIS PROPOSAL. SPECIFICALLY I WILL USE INVESTIGATE INSTRUMENT TECHNOLOGY THAT COULD BE USED ON FUTURE PLANETARY MISSIONS. I WILL ALSO USE ANALOG STUDIES AND FIELDWORK TO BETTER UNDERSTAND CYROSEISMOLOGY TO PREPARE FOR FUTURE MISSIONS. WHILE THIS PROJECT IS FOCUSED ON EUROPA THE THIRD TASK COULD EASILY BE ADAPTED TO FOCUS ON ENCELADUS OR TITAN TWO ICY WORLDS THAT ARE ALSO HIGH PRIORITIES FOR NASA