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SET Operations 1 Operational solar irradiances for MURI MURI Workshop October 21-22, 2008 W. Kent Tobiska

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Presentation on theme: "SET Operations 1 Operational solar irradiances for MURI MURI Workshop October 21-22, 2008 W. Kent Tobiska"— Presentation transcript:

1 SET Operations 1 http://SpaceWx.com Operational solar irradiances for MURI MURI Workshop October 21-22, 2008 W. Kent Tobiska 1-310-573-4185ktobiska@spacenvironment.net Space Environment Technologies

2 SET Operations 2 http://SpaceWx.com Overview A.JB2008 solar indices contributions to nighttime minimum exospheric temperature from daily change relative to 81-day value 1.S10 (74.1%) - created by SET/APEX from SOHO SEM 26-34 nm bandpass and used with 1-day lag 2.M10 (10.2%) - created by SET/S2KOPS from NOAA 16/17, SORCE, GOME MgII cwr and used with 2-day lag 3.F10 (9.8%) - observed by Penticton and used with 1-day lag 4.Y10 (5.8%) - created by SET/S2KOPS from MgII/Lyman- alpha/GOES XRS and used with 5-day lag B.Other solar datasets and models

3 SET Operations 3 http://SpaceWx.com JB2008 website http://sol.spacenvironment.net/~JB2008/

4 SET Operations 4 http://SpaceWx.com The JB2008 solar indices

5 SET Operations 5 http://SpaceWx.com 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 SET Operations 6 http://SpaceWx.com Motivation for new Y10 solar index … capture the X-ray & Ly  absorption in lower thermosphere Seuv Xb10 & Lya Esrc Lya Ehrt MgII Altitude of unit optical depth for UV absorption

7 SET Operations 7 http://SpaceWx.com Creating Y10: start with GOES 0.1-0.8 nm soft X-rays

8 SET Operations 8 http://SpaceWx.com Separate background (X b10 = X10) and flare (X hf ) indices

9 SET Operations 9 http://SpaceWx.com Make solar cycle adjustment to Lyman-alpha (~L10)

10 SET Operations 10 http://SpaceWx.com Form SET Lyman-alpha composite

11 SET Operations 11 http://SpaceWx.com Combine L10 and X10 to form Y10 L10, X10, Y10

12 SET Operations 12 http://SpaceWx.com 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 SET Operations 13 http://SpaceWx.com The result – JB2008 densities

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

15 SET Operations 15 http://SpaceWx.com 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 platform SIP SY provides callable IDL routine for MURI models Solar Irradiance Platform v2.34

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