At ISAS, there are no plans to produce a processing system suitable for US astronomers. The software written for the Tenma and Ginga missions is not suitable for adaptation--it runs on Fujitsu mainframes, is not portable and cannot deal with imaging data. The US GOF will lead the development of the data processing system. This will be written in close collaboration with ISAS and it is expected that it will also be used at ISAS, thus avoiding the wasteful duplication of effort required to write two separate systems.
The general philosophy of the data processing system is that it will be modular and portable with: