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Operational solar irradiances for MURI

Operational solar irradiances for MURI. MURI Workshop October 21-22, 2008 W. Kent Tobiska 1-310-573-4185 ktobiska@spacenvironment.net Space Environment Technologies. Overview.

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Operational solar irradiances for MURI

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  1. Operational solar irradiances for MURI MURI Workshop October 21-22, 2008 W. Kent Tobiska 1-310-573-4185 ktobiska@spacenvironment.net Space Environment Technologies

  2. Overview • JB2008 solar indices contributions to nighttime minimum exospheric temperature from daily change relative to 81-day value • S10 (74.1%) - created by SET/APEX from SOHO SEM 26-34 nm bandpass and used with 1-day lag • M10 (10.2%) - created by SET/S2KOPS from NOAA 16/17, SORCE, GOME MgII cwr and used with 2-day lag • F10 (9.8%) - observed by Penticton and used with 1-day lag • Y10 (5.8%) - created by SET/S2KOPS from MgII/Lyman-alpha/GOES XRS and used with 5-day lag • Other solar datasets and models

  3. JB2008 websitehttp://sol.spacenvironment.net/~JB2008/

  4. The JB2008 solar indices

  5. The JB2008 solar indices F10 Max = 284.500 Min = 65.0000 Mean = 122.429 +/- 47.5474 1-sigma Ratio max:min = 4.37692 S10 Max = 235.400 Min = 56.3000 Mean = 122.191 +/- 45.4857 1-sigma Ratio max:min = 4.18117 M10 Max = 243.400 Min = 60.1000 Mean = 121.046 +/- 44.0598 1-sigma Ratio max:min = 4.04992 Y10 Max = 195.020 Min = 45.8300 Mean = 104.612 +/- 36.4647 1-sigma Ratio max:min = 4.25529

  6. MgII Lya Altitude of unit optical depth for UV absorption Ehrt Esrc Xb10 & Lya Seuv Motivation for new Y10 solar index … capture the X-ray & Ly absorption in lower thermosphere

  7. Creating Y10: start with GOES 0.1-0.8 nm soft X-rays

  8. Separate background (Xb10 = X10) and flare (Xhf) indices

  9. Make solar cycle adjustment to Lyman-alpha (~L10)

  10. Form SET Lyman-alpha composite

  11. Combine L10 and X10 to form Y10 L10, X10, Y10

  12. The formation of Y10 • L10 is the SET composite Lyman-alpha FUV emission reported in sfu units after linear regression with F10 • X10 is the SET Xb10 X-ray background component reported in sfu units after linear regression with F10 • F81norm is the normalized 81-day smooth of F10 • Y10 = F81norm*(X10) + (1-F81norm)*(L10)

  13. The result – JB2008 densities

  14. Existing data links for SET data products and those of other organizations using coupled solar irradianceshttp://spacewx.com Products quicklink

  15. Solar Irradiance Platform v2.34 SIP PG provides historical, nowcast, and operational forecast XUV-UV variability in several spectral and proxy formats, including JB2006/JB2008 indices, using the IDL Virtual Machine that runs on any platformSIP SY provides callable IDL routine for MURI models

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