THE ANALYSIS OF LISA DATA WILL BE SIGNIFICANTLY DIFFERENT THAN DATA FROM GROUND-BASED DETECTORS OWING TO THE FACT THAT THERE WILL BE THOUSANDS OF OVERLAPPING SIGNALS FROM MULTIPLE SOURCE CLASSES CONSTANTLY IN THE DATA. THIS POSES A VARIETY OF INTERESTING PROBLEMS TO DEVELOP STRATEGIES TO IDENTIFY ISOLATE AND EXTRACT SIGNALS AND PARAMETERS FROM INDIVIDUAL SOURCES. ASTROPHYSICAL INFERENCE AND INTERPRETATION OF SIGNALS FROM SINGLE AND WHOLE POPULATIONS OF SOURCES WILL REQUIRE TARGETED QUANTITATIVE MODELS FOR OBSERVATIONAL SELECTION BIASES. ADDITIONALLY MULTI-MESSENGER OBSERVATIONS OF LISA SOURCES BEFORE DURING AND AFTER THE LISA MISSION WILL PLAY CRITICAL ROLES IN INTERPRETING AND UNDERSTANDING THE LISA SOURCE CATALOGS. OBSERVATIONAL BIAS HAS MANY ORIGINS INCLUDING SELECTION EFFECTS DERIVED FROM THE FUNDAMENTAL ASTROPHYSICAL PARAMETERS OF A SOURCE UNCHARACTERIZED PHYSICAL EFFECTS THAT SYSTEMATICALLY ALTER DATA RELATIVE TO NAIVE EXPECTATIONS THE RESPONSE OF THE INSTRUMENT TO DIFFERENT SOURCES AT DIFFERENT FREQUENCIES AND SKY LOCATIONS AND ON THE METHODS USED TO IDENTIFY AND EXTRACT SOURCE PARAMETERS FROM THE DATA. IN OUR PROPOSAL WE WILL CONSIDER THE PROBLEM OF IDENTIFYING AND QUANTIFYING ASTROPHYSICAL INFORMATION CONTAINED IN LISA DATA FOR THE POPULATION OF ULTRA-COMPACT BINARIES. WE WILL PRODUCE A SET OF PUBLIC TOOLS THAT THE ASTROPHYSICAL COMMUNITY CAN USE TO SIMULATE DATA CATALOGS FOR INFERENCE AND INTERPRETATION STUDIES OF COMPACT BINARIES IN LISA ANALYSIS AND FOUNDATIONAL DATA FOR SIMULATING POPULATIONS OF ULTRA-COMPACT BINARIES FOR STUDIES IN LISA DATA ANALYSIS STELLAR EVOLUTION AND GRAVITATIONAL WAVE SOURCE SIMULATION. WE ARE PRINCIPALLY INTERESTED IN HOW ASTROPHYSICAL INFORMATION IMPRINTS IN LISA OBSERVATIONS COMPACT STELLAR MASS BINARIES AND WHAT BIASES ARE INTRODUCED IN CATALOGS DERIVED FROM DIFFERENT APPROACHES TO LISA ANALYSIS OF THE COMPACT BINARIES. WE WILL INCLUDE NONSTANDARD SOURCES E.G. ECCENTRIC BINARY BLACK HOLES AND INTERACTING DOUBLE WHITE DWARFS WITH INVERSE GRAVITATIONAL-WAVE CHIRPS WHICH HOLD SPECIAL PROMISE FOR MULTI-WAVELENGTH AND MULTI-MESSENGER STUDIES AND CAN BE USED TO LEVERAGE MAXIMAL INFORMATION.