Difference: SpacecraftObservatoryWeb (40 vs. 41)

Revision 412012-05-28 - BrunoMerin

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META TOPICPARENT name="WebHome"

Spacecraft and observatory web pages

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  • The radiation monitor on-board Herschel is called SREM for Standard Radiation Environment Monitor. SREM raw and calibrated data products are delivered with the Herschel observations as part of the auxiliary context, inside the observation context. The SREM units detect and count electrons, protons and cosmic rays with a coarse spectral resolution and 20◦ angular resolution. The measurements are based on silicon diodes polarized in reverse by a high voltage. The SREM consists of three detectors, D1, D2 and D3, mounted in two heads. One head consists of a single silicon diode (D3) and its main entrance window is covered with an aluminium plate of 0.7mm, defining a lower energy threshold of ~0.5MeV for electrons and ~10MeV for protons. The other head uses to silion diodes (D1/D2) arranged in a telescope configuration. The main entrance window is covered with an aluminum plate of 2mm providing a threshold of 1.5MeV for electrons and 20MeV for protons.
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  • SREM calibrated 5-minutes-rebinned counts from the 30th of October 2009 to 25 March 2012, a second plot zooming on the large solar Flares on the 23rd Jan and on the 7th of March 2012, the largest ever in the history of the Herschel mission:
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  • SREM calibrated 5-minutes-rebinned counts from the 30th of October 2009 to 28 May 2012, a second plot zooming on the large solar Flares on the 23rd Jan and on the 7th of March 2012, the largest ever in the history of the Herschel mission:
 
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-- MiguelSanchez - 26 Mar 2012
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-- MiguelSanchez - 28 May 2012
 

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