Observation and analysis of single event effects on-board the SOHO satellite

Harboe-Sørensen, R.; Daly, E.; Teston, F.; Schweitzer, H.; Nartallo, R.; Perol, P.; Vandenbussche, F. C.; Dzitko, H.; Cretolle, J.

doi:10.1109/tns.2002.1039665

Cited by 25 publications

(9 citation statements)

References 9 publications

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“…Further, to demonstrate that the anomalous CRF variation observed during this most recent solar minimum is not an artifact produced by the Earth's atmosphere or magnetosphere, we must consider a non-Earthbound monitor of the space particle environment, such as that studied by Mewaldt et al (2010). Such a data set is provided (serendipitously) by the "Single Event Flag", or bad-bit count rate of the solid state recorder (SSR) on the Solar and Heliospheric Observatory (SOHO; Domingo et al 1995;Harboe-Sorensen et al 2002). The SOHO SSR data is discussed in more detail in Appendix A.…”

Section: The 2009 High In Cosmic Ray Flux Measured At Earth: Coincidementioning

confidence: 99%

Hemispheric Asymmetries of Solar Photospheric Magnetism: Radiative, Particulate, and Heliospheric Impacts

McIntosh

Leamon

Gurman

et al. 2013

ApJ

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Among many other measurable quantities the summer of 2009 saw a considerable low in the radiative output of the Sun that was temporally coincident with the largest cosmic ray flux ever measured at 1AU. Combining measurements and observations made by the Solar and Heliospheric Observatory (SOHO) and Solar Dynamics Observatory (SDO) spacecraft we begin to explore the complexities of the descending phase of solar cycle 23, through the 2009 minimum into the ascending phase of solar cycle 24. A hemispheric asymmetry in magnetic activity is clearly observed and its evolution monitored and the resulting (prolonged) magnetic imbalance must have had a considerable impact on the structure and energetics of the heliosphere. While we cannot uniquely tie the variance and scale of the surface magnetism to the dwindling radiative and particulate output of the star, or the increased cosmic ray flux through the 2009 minimum, the timing of the decline and rapid recovery in early 2010 would appear to inextricably link them. These observations support a picture where the Suns hemispheres are significantly out of phase with each other. Studying historical sunspot records with this picture in mind shows that the northern hemisphere has been leading since the middle of the last century and that the hemispheric dominance has changed twice in the past 130 years. The observations presented give clear cause for concern, especially with respect to our present understanding of the processes that produce the surface magnetism in the (hidden) solar interior -hemispheric asymmetry is the normal state -the strong symmetry shown in 1996 was abnormal. Further, these observations show that the mechanism(s) which create and transport the magnetic flux magnetic flux are slowly changing with time and, it appears, with only loose coupling across the equator such that those asymmetries can persist for a considerable time. As the current asymmetry persists and the basal energetics of the system continue to dwindle we anticipate new radiative and particulate lows coupled with increased cosmic ray -3fluxes heading into the next solar minimum. Subject headings: Sun: solar wind -Sun:magnetic fields -Sun:corona Fig. 1.-From top to bottom the total solar irradiance measured by SOHO/VIRGO, the mean Fe charge state ( Q Fe ) measured by ACE/SWICS, the abundance of Helium (A He ) measured by ACE, the apparent scale length of the SOHO/EIT transition region network emission, and the power-law index of the SOHO/MDI "Magnetic Range of Influence" (MRoI over solar cycle 23 and into the early part of cycle 24. For reference we show 2 dates: January 1, 2007 (dashed vertical line) and January 1, 2009 (dotted vertical line) and horizontal dashed lines to indicate the 1996 level of each measurement. The solar wind measures are differentiated by speed as indicated-note that there is no measurement of Q Fe before 1998.

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Section: The 2009 High In Cosmic Ray Flux Measured At Earth: Coincidementioning

confidence: 99%

Hemispheric Asymmetries of Solar Photospheric Magnetism: Radiative, Particulate, and Heliospheric Impacts

McIntosh

Leamon

Gurman

et al. 2013

ApJ

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“…R D (t) in (1) and R D (t) in (2) have the exactly same value for an integer multiple of T D . And the difference between them for other values of t is negligible because λ 1.…”

Section: Reliability Modelmentioning

confidence: 95%

“…These external disturbances only affect the data saved in a RAM and leave the RAM intact. As the density of the RAM is increased, SEU will gain more significance in high-reliability applications in space, at aircraft altitude and even at ground level [1]- [3].…”

Section: Introductionmentioning

confidence: 99%

Transient Bit Error Recovery Scheme for ROM-Based Embedded Systems

Ryu

Park

2005

IEICE Transactions on Information and Systems

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A new simple recovery scheme for transient bit errors in the RAM of a ROM-based embedded system is presented, which exploits the information stored in the ROM. And a new scrubbing technique suitable to the proposed recovery scheme is also presented. With the proposed recovery scheme and scrubbing technique, the reliability of the RAM against transient bit errors can be improved remarkably with no additional extra memory and scrubbing overhead.

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“…Single event transients (SET) in voltage comparators are known to be the ultimate reason of some electronic fails in satellites [14]- [16]. Since analog devices do not retain information, the single event transients vanish in a few microseconds without leaving any trace.…”

Section: Introductionmentioning

confidence: 99%

Defining a strategy to perform life-tests with analog devices

Franco

Palomar

Liu

et al. 2011

2011 12th European Conference on Radiation and Its Effects on Components and Systems

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Abstract-Unlike for memory elements inside integrated circuits, scarce life tests have been performed to study single event transients in discrete analog devices. The reason is that life tests require a large amount of samples to be stored for having enough data allowing statistical conclusions and, usually, single event transients are captured by means of oscilloscopes. In this paper, we propose a strategy to carry out life tests in analog voltage comparators by means of digital programmable device that can detect anomalous pulses in the voltage comparator. Besides, the idea on which this kind of tests relies can be extended to be used with other families of analog devices, such as operational amplifiers, voltage references, etc.

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Observation and analysis of single event effects on-board the SOHO satellite

Cited by 25 publications

References 9 publications

Hemispheric Asymmetries of Solar Photospheric Magnetism: Radiative, Particulate, and Heliospheric Impacts

Hemispheric Asymmetries of Solar Photospheric Magnetism: Radiative, Particulate, and Heliospheric Impacts

Transient Bit Error Recovery Scheme for ROM-Based Embedded Systems

Defining a strategy to perform life-tests with analog devices

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