1 / 21

GLE list registered at Lomnicky stit NM station List of GLEs detected by our GLE filter code

Checking the simultaneous profiles on 1min data from Lomnick ý š t í t during strong CR variations R. Langer, K. Kudela. GLE list registered at Lomnicky stit NM station List of GLEs detected by our GLE filter code GLE / GLE onset / GLE max 60 / 13 45 -13 50 / 14 20 -14 25

beyla
Download Presentation

GLE list registered at Lomnicky stit NM station List of GLEs detected by our GLE filter code

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Checking the simultaneous profiles on 1min data from Lomnickýštít during strong CR variationsR. Langer, K. Kudela NMDB Kiel midterm Meeting

  2. NMDB Kiel midterm Meeting GLE list registered at Lomnicky stit NM station List of GLEs detected by our GLE filter code GLE / GLE onset / GLE max • 60 / 1345-1350 / 1420-1425 • 65 / 1113-1114 / 1118-1119 • 69 / 0650-0655 / 0705-0710 • 70 / 0250-0251 / 0300-0301

  3. NMDB Kiel midterm Meeting GLE 060

  4. NMDB Kiel midterm Meeting GLE 065

  5. NMDB Kiel midterm Meeting GLE 069

  6. NMDB Kiel midterm Meeting GLE 070

  7. NMDB Kiel midterm Meeting ME 12

  8. NMDB Kiel midterm Meeting ME 195

  9. NMDB Kiel midterm Meeting Method – checking algorithm If next value is bigger than average+standard deviation of previous 10 values we check next three values to same condition, if all four values (T1 .. T4) are fulfill condition, we find GLE

  10. NMDB Kiel midterm Meeting Table 1. a) of detected increases • Method based on 10 points prehistory • Checking algorithm condition valid in 5 or more chanels (for condition T1)‏ • For nex two point we check if condition was valid in 6 or more chanels (for T2 > T1, T3 > T1)‏ GLE 065 was not detected by the checking algorithm Mistake events are quite rare

  11. NMDB Kiel midterm Meeting Table 1. b) of detected increases • Same method as in evaluation Table 1. a)‏ • From the measured data not corrected to the barometric pressure We think that barometric pressure corected data will give more mistake events (because errors in pressure measurements) during checking procedure, but result was opposite. We find more mistakes events in not corrected data (see line with DOY 341, YY 05 in table right here) . Because that we are checking just corrected data.

  12. NMDB Kiel midterm Meeting Table 2. of detected increases • Method based on 6 points prehistory • Checking algorithm condition valid in 5 or more chanels (for condition T1)‏ • For nex three points we check if condition was valid in 5 or more chanels (for T2 > T1, T3 > T1, T4 > T1)‏ GLE 070 was not detected by the checking algorithm Mistake events are quite often

  13. NMDB Kiel midterm Meeting Table 3. of detected increases • Method based on 15 points prehistory • Checking algorithm condition valid in 5 or more chanels (for condition T1)‏ • For nex three points we check if condition was valid in 5 or more chanels (for T2 > T1, T3 > T1, T4 > T1)‏ GLE 070 was not detected by the checking algorithm Mistake events are quite rare

  14. NMDB Kiel midterm Meeting Table 4. of detected increases • Method based on 10 points prehistory • Checking algorithm condition valid in 5 or more chanels (for condition T1)‏ • For next four points we check if condition was valid in 5 or more chanels (for T2 > T1, T3 > T1, T4 > T1, T5 > T1)‏ GLE 060 and GLE 070 were not detected by the checking algorithm Mistake events are very rare.

  15. NMDB Kiel midterm Meeting Table 5. of detected increases • Method based on 10 points prehistory • Checking algorithm condition valid in 5 or more chanels (for condition T1)‏ • For next four points we check if condition was valid in 5 or more chanels (for T2 > T1, T3 > T1, T4 > T1)‏ All expected GLE were detected by this checking algorithm This algorithm we recoment to use in the future.

  16. NMDB Kiel midterm Meeting Table 6. of detected increases in year 2001 • Same algorith like showed for Table 5. • But for next four points we check if condition was valid in 5 or more chanels (for T2 > T1, T3 > T2, T4 > T3)‏ • This was just test to improve checking method GLE 060 was not detected by this checking algorithm

  17. NMDB Kiel midterm Meeting Table 7. of detected increases • Same algorith like showed for Table 5. • In this case condition was T1 > average + (1.1 * standard deviation) of previous 10 values • This was just test to improve checking method GLE 070 was not detected by this checking algorithm

  18. NMDB Kiel midterm Meeting Table 8. of detected increases • Same algorith like showed for Table 5. • Corrected sums was taken like chanels in previous cases • Condition was stricter: for T1, T2, T3 and T4 was valid for both „chanels“ simultaneously, (for T2 > T1, T3 > T2, T4 > T3)‏ GLE 065 was not detected Mistake events dont appear

  19. NMDB Kiel midterm Meeting Table 9. of detected increases • Same algorith like showed for Table 5. • Corrected sums was taken like chanels in previous cases • Condition for T1, T2, T3 and T4 was valid for all three „chanels“ simultaneously (for T2 > T1, T3 > T2, T4 > T3)‏ Result for calculation with three station taken like chanels are equivalent to results in Table 8. This algorithm can be used for real time detection of GLE.

  20. Ground level enhancement real-time alarm based on 8 high latitude NMs including those at high mountain is described by (Kuwabara et al, SW 2006a). Three level alarm system (by number of NMs exceeding threshold value above that of baseline) is suggested. Out of 10 GLEs in 2001-2005 archived data the system produced 9 correct alarms. GLE system gives earlier warning than satellite (SEC/NOAA) alert. Number of minutes by which GLE alert precedes earliest SEC proton alert. NMDB Kiel midterm Meeting

  21. NMDB Kiel midterm Meeting END

More Related