Don't want to spoil the joke thread with a serious response, but -- what processor DOES the JWST use? How out of date is it given the project started in the 90s?

The primary compute bits include the science instrument data handling electronics, the Solid State Recorder (SSR) and the Command & Data Handling processor (C&DH).

NASA has plenty of publications about the design, I haven't found anything yet that covers the SSR or C&DH yet, but this is an interesting article about implementing SpaceWire reliable messaging in an FPGA.

ntrs.nasa.gov/api/citations/20

The science data handling here is done in an Actel AX1000 FPGA.

@eqe jwst.nasa.gov/resources/ISIMma has some details, including discussion of Rational Rose Real-Time UML and communication on the Spacewire bus.

Follow

@eqe and they can be modifid:
> The fact that the OSS is written in JavaScript and stored on-board as text files is significant because this gives the operations personnel greater visibility, control and flexibility over the telescope operations. As they learn the ramifications and subtleties of operating the instruments, they can modify the JavaScripts and, after thorough testing in a ground facility, they can simply replace an onboard file to make the change.

Sign in to participate in the conversation
(void *) social site

(void*)