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Do You Know James Webb Space Telescope Has Only 68GB of SSD Storage? See Why?

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As per IEEE Spectrum, JWST has an extremely small 68GB onboard SSD. Now, look at the New iPhones where even the standard storage capacity isn't 64GB; it is even more than that, but still, it isn't enough for you.

There are several reasons for the shockingly low storage capacity for data of JWST. 

JWST is located at Lagrange Point (L2), around 1.5 million kilometres from Earth.

The separation between Earth and JWST means that the DATA collected by the telescope must return to Earth without causing any damage.

JWST sends the data towards Earth in 28 megabits per sec using Ka-band. 

While these aren't too fast compared to broadband speeds for consumers available on Earth, JWST is far ahead of the Hubble telescope in terms of data collection and transmission speed. 

The Hubble telescope can collect and store as much as 1-2GB of data daily, while JWST can create daily 57GB of data.

However, this also means that JWST will be out of storage capacity for data within a single calendar day. Although this is technically true, JWST has scheduled daily to transfer all of the files back on Earth.

JWST is linked with the Deep Space Network (DSN), and Voyager probes Mars Rovers and others. 

The DSN comprises three antenna complexes: Canberra, Australia; Madrid, Spain; and Barstow, Calif. 

With this, JWST needs about 4.5 hours to relay all information back to Earth, which happens within its two four-hour contact times daily.

So, unlike smartphones with 64GB of storage, JWST erases all of its daily files once it has confirmed that it has transferred to Earth, which means that the SSD of 68GB capacity is sufficient to fulfil the task. 

NASA is also estimating that all radiation, wear, and tear will decrease the storage capacity to 60GB throughout JWST's 10-year lifespan.