Sunday, August 14, 2022

64GB iPhone Might Not Be Enough For You, But The James Webb Telescope Is Happy With Its 68GB SSD Storage

The James Webb Space Telescope (JWST), behind the Hubble Space Telescope, is now taking in some stunning images of outer space we’ve never seen before. But have you ever wondered how JWST saves these high resolution images and sends them to Earth?

Based on the IEEE Spectrum, the JWST has a relatively small 68GB SSD, now compare it to the new iPhone where the base storage isn’t up to 64GB as that’s not enough. Leading smartphone storage space up to 1TB. Whereas this $10 billion space telescope only has 68GB SSD!!

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There is a reason behind the very low data storage capacity of JWST. This space telescope is located at Lagrangian Point (L2) which is located at a distance of about 1.5 million km from Earth. With such a great distance between Earth and the JWST, it means that the data collected by the telescopes should make it back to Earth without any damage.

JWST sends data back to Earth at 28 Mbps ka band, While this appears to be slightly slower than consumer broadband speeds on Earth, JWST is far ahead of the Hubble Telescope in terms of data collection and transmission speeds. The Hubble Telescope can capture and store 1-2 gigabytes of data per day while the JWST can generate 57 gigabytes of data per day.

But it also means that JWST will run out of data storage in just one day from the scheduled snapshot. While this is technically true, JWST has a daily scheduled opportunity to send all data back to Earth.

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JWST is connected to the Deep Space Network (DSN) with Voyager, the Mars rover and other sensors. The DSN consists of three antenna complexes: Canberra, Australia; Madrid, Spain; Barstow, Calif. With this, it takes about 4.5 hours for JWST to send all its data back to Earth, and it does so in two 4-hour communication windows per day.

So, unlike smartphone users with 64GB storage capacity, JWST deletes all their daily data as soon as the transfer is confirmed on Earth, and a 68GB SSD is sufficient for this. NASA also estimates that all radiation and wear and tear will reduce JWST storage capacity to 60 GB over a 10-year time frame.

Nation World News Desk
Nation World News Deskhttps://nationworldnews.com
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