The James Webb Space Telescope is catching the universe on a 68GB SSD
With the James Webb Space Telescope (JWST) presently fueled up and snapping a few fabulous pictures, you might ponder precisely how it's putting away them. Shockingly enough, it conveys a moderately little 68GB SSD, as per IEEE Spectrum — enough to deal with a day of JWST pictures, yet not significantly more.
While that could sound ridiculously little for a $10 billion satellite, there are different reasons NASA picked the framework. Most importantly, the JWST is 1,000,000 miles from Earth where it gets besieged by radiation and works at a temperature of under 50 degrees above outright zero (- 370 degrees F). So the SSD, similar to any remaining parts, should be radiation solidified and endure an exhausting certificate process.
While not close to as quick as purchaser SSDs, it can in any case be almost filled in just 120 minutes by means of the telescope's 48 Mbps order and information dealing with subsystem (ICDH). Simultaneously, the JWST can send information back to Earth at 28 Mbps by means of a 25.9 Ghz Ka-band association with the Deep Space Network.
That really intends that while it gathers undeniably a larger number of information than Hubble could possibly do (57GB contrasted with 1-2GB each day), it can move all that information back to Earth in around 4.5 hours. It does as such during two 4-hour contact windows every day, with each permitting the transmission of 28.6GB of science information. At the end of the day, it just requirements enough capacity to gather a day of pictures — there's compelling reason need to keep them on the actual telescope.
However, there is one puzzler. NASA assesses that just 60GB of stockpiling will be accessible toward the finish of the JWST's 10-year life expectancy because of wear and radiation — and 3 percent of the drive is utilized for designing and telemetry information capacity. That will leave the JWST very little edge, making us keep thinking about whether it will have even close to the life span of Hubble — as yet going solid following 32 years.