Space Weather User Needs Related to Solar Observations

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● Space Weather User Needs Related to Solar Observations
● Services and associated data collection means should (eventually) be driven by user requirements
● User Needs Identification
● User Requirements Focus
on End Effects
● Solar Sources and Ultimate Effects
● Measurement Requirements
● Synthesis of solar measurement requirements
● What is done now?
● Solar Observations in the Context of Human Space Exploration
● Courtesy of Mark Weyland (JSC SRAG)
● NASA human spaceflight needs
● Research
● There are Differences between Science Requirements and Service Requirements
● Proba-2
● Conclusions

نوع زبان: انگلیسی حجم: 5.93 مگا بایت
نوع فایل: اسلاید پاورپوینت تعداد اسلایدها: 22 صفحه
سطح مطلب: نامشخص پسوند فایل: ppt
گروه موضوعی: زمان استخراج مطلب: 2019/06/07 11:55:31

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عبارات مهم استفاده شده در این مطلب

عبارات مهم استفاده شده در این مطلب

., solar, requirement, model, cme, event, space, measurement, resolution, user, coronal, datum,

توجه: این مطلب در تاریخ 2019/06/07 11:55:31 به صورت خودکار از فضای وب آشکار توسط موتور جستجوی پاورپوینت جمع آوری شده است و در صورت اعلام عدم رضایت تهیه کننده ی آن، طبق قوانین سایت از روی وب گاه حذف خواهد شد. این مطلب از وب سایت زیر استخراج شده است و مسئولیت انتشار آن با منبع اصلی است.

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عبارات پرتکرار و مهم در این اسلاید عبارتند از: ., solar, requirement, model, cme, event, space, measurement, resolution, user, coronal, datum,

مشاهده محتوای متنیِ این اسلاید ppt

مشاهده محتوای متنیِ این اسلاید ppt

space weather user needs related to solar observations eamonn daly and alexi glover esa space environments and effects section estec the netherlands services and associated data collection means should eventually be driven by user requirements user requirements data requirements measurement requirements system design user needs identification parallel studies for esa by consortia led by alcatel now thales alenia space and ral ~ ۲ intensive study of user requirements leading to full system designs more recent updating in context of study of space weather nanosats ral at al. ~ ۲ ۶ consolidation in the scope of ilws task group on users see poster glover et al. this meeting presentation of hochedez et al monitoring capabilities for solar weather nowcast and forecast esww ۲ ۴ available esa esa user requirements focus on end effects e.g. ral study of user requirements solar sources and ultimate effects service requirements active region identification characterisation and tracking coronal hole identification and tracking establishment of active region and coronal hole magnetic fields warnings of potential flaring and cmes alerts on flaring and cme occurrence event magnitude prediction all clear note timescale differences flare em in minutes sep ~ hour shocks and storms days primary phenomena resulting phenomena early phase of coronal mass ejection cme prompt acceleration of energetic particles interplanetary shock preceding cme continuing acceleration of energetic particles magnetic structures associated with cme affect interplanetary propagation of energetic particles trigger geomagnetic storms on encountering magnetosphere coronal holes high speed streams boundaries are sources of acceleration boundaries trigger geomagnetic storms solar flares large uv and x emissions affect ionosphere and thermosphere measurement requirements esa ۱ euv x ray solar images full sun images in euv x ray wavelengths are required for precursor identification with angular resolution as good as or better than soho eit ie. ۵ arc seconds. ۱–hour resolution is probably adequate. ۲ visible or uv occulted coronal images coronal images show the occurrence of halo cmes. angular resolution as good as soho lasco ie. ۱۱ arc seconds is desired. the good spectral resolution of lasco is not essential for a space weather application. ۳ visible or uv images of sun earth space to spot earth directed cmes stereo viewing from for example earth and l۴ or l۵ is preferable with angular resolution of around ۳ arc seconds. ۷ x ray flux ۱ minute resolution of total flux is required to capture x ray flare onset and magnitude. spectral measurements like those of goes ie. .۱ .۸ nm and . ۵ .۴ nm are required. higher spectral resolution than the goes instrument may be useful eg. ۱ ۲ kev spectral measurements which could be achieved using proportional counters or solid state detectors. detection of solar radio bursts from the ground in the ۱ ۱ mhz range is a possible alternative or complementary measurement. ۸ uv flux this parameter is required for its effect on the ionosphere and upper atmosphere. ۹ f۱ .۷ radio flux f۱ .۷cm is radio flux from the sun usually measured every day at dominion in canada. it is often equivalent to ssn. continuous measurements would require several stations around the globe. ۱۷ ssn ssn is the optical number of sunspots according to the international index for sunspots algorithm. this index is routinely maintained by the world data center for the sunspot index in brussels. ۱۸ imf b field … work on modelling magnetic structures in the solar wind such as cmes has indicated that knowledge of the magnetic field structure of the sun at the point of origin may enable the field within the structure to be predicted. … synthesis of solar measurement requirements what is done now ises services including european ones flare prediction and warnings spe predictions and warnings alert support independent access to solar soho ground … images by system operators without support and interpretation access to e.g. sidc cls by sat. operations noaa support to human spaceflight via jsc srag … solar observations in the context of human space exploration future manned missions to moon mars will have strong requirements for forecasts and nowcasts unpredictability of event timings and magnitude helio propagation us national research council report ۲ ۶ based on wintergreen workshop ۲ ۵ for the average well connected event these methods predict the maximum intensity within an order of magnitude and the timing of the maximum within a couple of hours. these methods however fall apart for shock dominated events. hence current forecasting models do badly in predicting extreme events and extreme events represent the greatest danger to human spaceflight crews. courtesy of mark weyland jsc srag nasa human spaceflight needs develop forecasting tools giving ۳ minutes to ۲ hours lead time depending on the type of event . free space near earth measurements or reliable models of higher energy ~۱ ۱ mev proton ion spectra. ace type data models on mission termination. be able to predict magnitude duration characteristics of spe from information received at onset of event corollary model predictions for all clear at onset for small events and or all clear forecasting for n day in advance with ~۵ probability of particle activity. improved model correlations precursors of activity e.g. electron signatures. back side solar imaging modeling enabling region characterization. better comparison of instrument readings onboard shuttle station with models transporting simulated or past events through heliosphere magnetosphere vehicle and into onboard detectors. model interpretations allowing correction of goes particle data to near free space values. research identify the reliable solar surface precursors and indicators of flares and cmes solar magnetic field features eit waves and moreton waves helioseismology magnetic features associated with cmes and their coupling to heliosphere models in real time solar data driven models of heliospheric magnetic field for geoeffectiveness prediction seeding boundary conditions of shock and particle models prediction methodologies physics based nn etc. coronal hole characteristics boundaries heliospheric extension → soteria will play a major role in europe → new measurement requirements will probably emerge there are differences between science requirements and service requirements data type resolution coverage location target timeliness continuity quality calibration solar assets will continue to be science facilities in short and medium term proba ۲ lyra and swap are very good precursors for space weather service oriented instruments limited resources on …

کلمات کلیدی پرکاربرد در این اسلاید پاورپوینت: ., solar, requirement, model, cme, event, space, measurement, resolution, user, coronal, datum,

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