nafizcristia98
Do³±czy³: 05 Mar 2024 Posty: 1
|
Wys³any: Wto Mar 05, 2024 07:39 Temat postu: The descent began with a sequence of deorbiting manoeuvres. |
|
|
This consumed all the satellite’s remaining fuel and lowered its average altitude from km to km, which reduced the collision risks. TNW Conference - Group ticket offer Save up to % with our Group offer and join Europe's leading tech festival in June! ERS- was then “passivated” — a process that removes the energy sources that could cause fragmentation or explosions. The remainder of the journey was then left to the cosmos. As an uncontrolled re-entry, ESA couldn’t determine the exact date of the return to Earth, but predicted that it would happen within the next years. Thirteen years later, the big day is almost here. ERS- has begun plunging into the lower layers of the atmosphere, where it will start burning up.
But the precise time — and location — of the arrival on our planet remains unclear. Graph showing the declining altitude of the ERS- satellite ahead of its re-entry The initial manoeuvres pulled the satellite towards a safer altitude where it would further decay. Credit: ESA ERS- is almost home ESA’s latest prediction Binance App Users Data revealed this morning — is that the re-entry will take place at : CET on February There’s an uncertainty window, however, of about two-thirds of a day (+/- hours) — which is typical at this point. The standard margin of error for these forecasts is %. Twenty-four hours before re-entry, for instance, the uncertainty should be around hours, plus or minus. This variability stems primarily from volatile solar activity. A collective term for all active phenomena on the Sun, from high-speed winds to flares, solar activity affects the drag that guides the speed and location of satellites. It’s also hard to forecast. Further curbs on the predictions include patchy tracking data, the complicated shape of reentering objects, mismodelling of conditions, and inexact computation. Forecasts can also be inhibited by our limited knowledge of the atmosphere in very low orbits.
When the big moment finally comes, most of ERS- will burn up in the atmosphere. Some fragments, however, may survive. The heaviest one that could reach Earth is the kg antenna structure of the Synthetic Aperture Radar (SAR). Thankfully, the chances of it hitting anyone are miniscule. According to ESA, the annual risk of a person being injured by space debris is under one in billion.EU to fine Apple €M amid big tech smackdown The penalty is the result of a complaint made by Spotify back in February , - : am EU to fine Apple €M amid big tech smackdown The European Union is set to fine Apple €mn for allegedly elbowing out competitors to its music streaming business, the Financial Times reported on Sunday, citing unnamed sources familiar with the matter. EU officials first started investigating the matter in , following a complaint for Spotify. The Swedish company claimed it was made to ramp up its monthly subscription to cover the % fee Apple charges to operate on its App Store. _________________ Binance App Users Data |
|