The Applications Software Technology Group (ASTG) provides custom high-performance computing (HPC) support to NASA funded researchers. The ASTG team consists of HPC experts from a variety of disciplines
including meteorology, physics, mathematics and several areas of engineering. ASTG services include training, parallelization, algorithmic improvements, optimization, porting, and software design/implementation. ASTG clients include the Goddard Institute of Space Studies (GISS), the Global Modeling Initiative (GMI), the Global Modeling and Analysis Office (GMAO), and NASA's Modeling, Analysis, and Prediction (MAP) Program.

Current projects include:
+ Cubed-Sphere fvcore
+ pFUnit
+ FFTT
+ GMI
+ Application Controlled Parallel Asynchronous Input/Output (Asynch I/O)
+ Modeling Guru
+ GISS ModelE
+ Sourcemotel
+ Gigaparticle Trajectories
+ Adjoint GCM