SUMMARY WE WILL CREATE A SOFTWARE TOOL FOR CONVERTING PDS4 DATA PRODUCTS INTO OTHER COMMONLY USED FILE FORMATS INCLUDING CDF AND FITS. THE TOOL WILL LEVERAGE EXISTING TOOLS DESIGNED TO GENERATE PDS4 DATA FROM VARIOUS SOURCES. OUR TEAM HAS SIGNIFICANT EXPERIENCE WORKING WITH MANY OF THE DIFFERENT TYPES OF SCIENCE PRODUCTS CURRENTLY IN THE PDS FROM IMAGES TO TABULAR DATA. ALSO OUR TEAM WAS ONE OF THE FIRST TEAMS TO FORMALLY DELIVER MISSION DATA IN PDS4 FORMAT. 1. SCIENTIFIC/TECHNICAL/MANAGEMENT 1.1. INTRODUCTION WITH THE INTRODUCTION OF PDS4 XML BASED LABELS AND THE USE OF THE XML OBJECT MODEL IT IS NOW POSSIBLE TO EASILY CREATE AN OBJECT MODEL OF THE DATA FORMAT PARSE THE DATA AND REPACKAGE IT INTO ANOTHER MORE COMMONLY USED FILE FORMAT. PDS4 XML OBJECTS CONTAIN ELEMENTS DEFINING ALL PARAMETERS NEEDED TO PARSE THE DATA FILE WHILE THE XML ORGANIZATION ALLOWS OPEN-SOURCE LIBRARIES TO ACCESS AND MANIPULATE THE OBJECTS AND OBJECT ELEMENTS CONTAINED WITHIN THE XML LABEL. OUR TEAM HAS EXTENSIVE MISSION EXPERIENCE WITH FILE FORMATS COMMONLY USED BY THE PLANETARY SCIENCE COMMUNITY. THE JOHNS HOPKINS APPLIED PHYSICS LABORATORY (JHU/APL) WAS ONE OF THE FIRST ORGANIZATIONS TO SUBMIT A PDS4 ARCHIVE WITH DATA FROM THE BALLOON OBSERVATION PLATFORM FOR PLANETARY SCIENCE (BOPPS) [1]. UCLA HOSTS THE PPI NODE OF THE PDS AND HAS RELEVANT EXPERIENCE WITH PDS4 AS WELL AS PDS3 FILE FORMATS. WE ALSO ROUTINELY DEAL WITH CDF DATA PRODUCTS WHICH ARE MORE TYPICAL OF HELIOPHYSICS MISSIONS. WE HAVE RECENTLY CREATED AND ARE ACTIVELY USING SOFTWARE TOOLS THAT CONVERT MULTIPLE INPUT TYPES INTO PDS4 DATA. THIS PROPOSAL WOULD FURTHER DEVELOP THOSE TOOLS TO REVERSE THE DIRECTION OF DATA CREATION AND CONVERT A PDS4 FORMATTED FILE BACK TO A COMMON FILE FORMAT SUCH AS FITS OR CDF. THE POOL OF ARCHIVED DATA IN PDS4 FORMAT IS STILL RELATIVELY SMALL BUT IS CERTAIN TO EXPAND AS CURRENT AND FUTURE NASA MISSIONS DELIVER ARCHIVES IN PDS4. NASA IS CONSIDERING A SIGNIFICANT CONVERSION EFFORT TO MOVE MANY OLDER PDS3 ARCHIVES TO PDS4 FORMAT. THUS IT IS A GOOD TIME TO FOCUS ON MAKING PDS4 DATA MORE USABLE. MANY OLDER PDS3 ARCHIVES HAVE DATA FORMATS THAT ARE NOT COMMONLY USED OR MAY HAVE BEEN MISSION SPECIFIC. THE PROPOSED SOFTWARE WOULD BE USEFUL FOR BOTH SCENARIOS. 1.2. METHODOLOGY WE INTEND TO: 1. DEVELOP SOFTWARE TOOLS THAT WILL MAP PDS4 XML LABELS TO AN INTERNAL DATA MODEL REPRESENTING THE DATA CONTENT DESCRIBED BY THE LABEL. 2. DEVELOP SOFTWARE TO READ PDS4 DATA INTO OUR INTERNAL DATA MODEL 3. CREATE SEVERAL OUTPUT OPTIONS FOR WRITING OUT THE INTERNAL DATA MODEL TO ONE OF SEVERAL COMMON OUTPUT FORMATS. 4. PROVIDE OUR SOFTWARE AS A. AN APPLICATION THAT CAN CONVERT PDS4 FILES TO OTHER FORMATS B. A JAVA LIBRARY FOR USE IN CREATING OTHER CONVERSION APPLICATIONS 5. DEMONSTRATE THE PROPOSED TOOL BY CONVERTING SEVERAL PDS4 DATASETS TO FITS AND CDF FORMAT. 6. MAKE THE SOURCE CODE THE EXECUTABLE AND THE LIBRARY AVAILABLE ONLINE AT THE GITHUB LOCATION REQUIRED BY THE AO: HTTPS://GITHUB.COM/NASA-PLANETARY-SCIENCE 1.3. RELEVANCE THIS PROPOSAL WILL ENHANCE THE USABILITY OF AND ACCESS TO PDS4 FILE FORMATS. SUCCESSFUL CONCLUSION OF THIS PROJECT PROVIDES NASA WITH A VALUABLE RESOURCE THAT ENABLES USERS TO ACCESS PDS4 DATA IN FILE FORMATS WHICH THEY ARE ALREADY ACCUSTOMED TO USING OR FOR WHICH APPLICATIONS ALREADY EXIST. REFERENCES [1] CHENG A.F. ET AL (2014) ICARUS DOI: 10.1016/J.ICARUS.2016.08.007