Larry Granroth



Larry J. Granroth is presently a Systems Architect in the Department of Physics and Astronomy at The University of Iowa, Iowa City, IA, USA. He is the computing systems administrator for several space physics research groups, including the radio and plasma wave research group founded by Professor Donald A. Gurnett. His duties include designing and maintaining the computing infrastructure for multiple NASA and ESA spaceflight projects and supervising the programming staff. Since becoming a scientific programmer in 1983, Mr. Granroth has been the lead developer for the data analysis efforts on projects including Voyager PWS and Galileo PWS. He was an active member of the Pilot Planetary Data System group which was the precursor to the current NASA PDS and continues to maintain the Outer Planets subnode of the Planetary Plasma Interactions node of the PDS. He has done significant programming relating to the ISEE, Voyager, DE, Galileo, Polar, Cassini, Cluster, and Mars Express spacecraft projects and the PDS, SPDS, and VxO data system projects. After assuming the role of systems administrator in 1995, Mr. Granroth has been the principal architect guiding the evolution of computing infrastructure to provide leading-edge data analysis and data management capabilities. After implementing the pioneering das data analysis system which provided project-independent interactive web-based analysis tools in the early years of the web, he has overseen the development of a distributed Java-based das2 system which provides a rich real-time analysis environment and is the foundation for leading VxO applications like Autoplot. Recent work includes the das2Server platform which enables interactive analyses of huge spacecraft data sets.

His professional affiliations include the American Geophysical Union (AGU), the Association for Computing Machinery (ACM), the IEEE Computer Society, Sigma Pi Sigma, and Sigma Xi. In addition, Mr. Granroth has received multiple NASA and ESA group achievement awards from the Cassini, Cluster, Galileo, and Voyager projects. He was also honored by the College of Liberal Arts and Sciences with a Staff Excellence Award.

Mr. Granroth is responsible for the computing environment that currently supports scientific instrument packages on Voyager, Cluster, Mars Express, Juno, MAVEN, and Parker Solar Probe missions. This includes a few Oracle/Solaris systems, about 70 Linux systems, over a petabyte of online storage, and miscellaneous PCs, lab equipment, and peripheral devices. In-house archives are maintained for spaceflight data dating back to 1971 and software and hardware resources allow a cadre of researchers from around the world to conduct in-depth data analysis and numerical modeling.

In the past, Mr. Granroth has participated in data restoration projects for Polar, DE, and ISEE, and collaborated with the Space Physics Archive Search and Extract (SPASE) group and the Virtual Wave Observatory (VWO) project. He has extensive knowledge of past spacecraft projects and their associated computing environments, including Sun/Solaris, VAX/VMS, MP/M, and Univac 418 systems. This breadth of knowledge uniquely qualifies him for data restoration projects.