Notes about the HDAT file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The HDAT file type is primarily associated with 'Objective Analysis Package'. The objective analysis (OA) package can be used to map observations to the application grid using space-time correlation functions.