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ERS-2 buckles and bends throughout closing farewell

February 26, 2024
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ERS-2 buckles and bends throughout closing farewell
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Following a massively profitable mission and virtually 30 years in orbit, ESA’s ERS-2 reentered Earth’s ambiance at roughly 18:17 CET (17:17 UTC) on 21 February 2024.

Predicting the precise time and placement of ERS-2’s pure reentry was made harder by the shortage of recent observations of the satellite tv for pc throughout its closing revolutions round Earth.

This GIF combines a number of the closing photographs of ERS-2 tumbling by way of the sky. They had been captured by the Monitoring and Imaging Radar (TIRA) on the Fraunhofer Institute for Excessive Frequency Physics and Radar Methods FHR in Germany.

TIRA’s 34-m antenna tracked the satellite tv for pc because it handed overhead for a couple of minutes on every of 19, 20 and 21 February. The ultimate session happened round 8:00 CET on 21 February, nonetheless roughly 10 orbits earlier than reentry.

By evaluating the photographs from the three TIRA monitoring periods, we will see that ERS-2’s photo voltaic array was already coming free and not firmly hooked up to remainder of the satellite tv for pc the day earlier than reentry.

When predicting a satellite tv for pc’s reentry trajectory, specialists deal with it as one inflexible object till virtually the very finish. If ERS-2’s photo voltaic array was free and transferring independently a day early, it might have brought about the satellite tv for pc to work together with the ambiance in methods we didn’t count on.

Specialists are actually analysing the information. If the buckling of the photo voltaic array is said to the truth that ERS-2’s reentry happened barely later than predicted, this analysis might assist enhance our forecasts of future pure reentries.

ESA thanks Fraunhofer Institute for Excessive Frequency Physics and Radar Methods FHR for offering measurements of their area commentary radar TIRA, in shut collaboration with the German Area Situational Consciousness Heart, GSSAC.

The color in these photographs represents radar echo depth and never temperature.



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