Sudden Ionosphere Disturbance Stanford Solar Center
http://solar-center.stanford.edu/sid.html Version 2.0 Slides by Ray
Mitchell
Slide 2
SID Sudden Ionosphere Disturbance Theory of Operation
Slide 3
The Sun, Ionosphere, and Radio waves
Slide 4
Navy Radio Station, Jim Creek, WA NLK 24.8KHz Source:
http://www.cmsstudios.com/fly2k/99flights/images/ebbyjm.jpghttp://www.cmsstudios.com/fly2k/99flights/images/ebbyjm.jpg
200 Towers Antenna Wires
Slide 5
About 24.8 KHz How to make this Computation? Speed of light:c =
186,000 Miles/Sec (300,000 KM/Sec) Frequency:f = 24,800 Cycles/Sec
Wave Length: = c / f Miles (or KM) / Cycle 1 Cycle = 7.5 Miles (12
KM) Sound file Amplitude (Peak-to-Peak) Distance traveled over time
Radio Signal
Slide 6
The SID Shed (Reference) Located in Stanford Hills next to The
Wilcox Solar Observatory Tuned loop Antenna Observation Dates:
(Approx) 24-Jul-03 Present date
Slide 7
Research and Development Building the SID Monitors
Slide 8
Prototype SID Monitor & Antenna Box Dimensions: 4 w X 10 L
X 3 h 30 square, 50 turns of #26 wire Connected with RG-58 Coax
Pre-Amp DataQ Post-Amp Model: SID_Beta-1
Slide 9
SID Monitor: Block Diagram Pre-Amp 24.8KHz Filter Signal
Strength DATAQ Computer RS-232 Coax = All frequencies Band-pass,
Only 24.8KHz (Amplitude Modulation) DC voltage Level 10 bit, Analog
to Digital Conversion Sample every 5 Seconds
Slide 10
Normal 24 Hr. Day (No flares) Local Noon Sunrise Sunset
Nighttime Daytime Time in UT
Slide 11
Detecting Solar Flares SID(s) SID Events! However, not all SID
events are explainable. Research is needed to help answer What are
these events?
Slide 12
GOES-12 Weather Satellite Detecting X-Rays
Slide 13
Connecting SID to GOES Data C4.5 C5.9 C3.8 M1.3
Slide 14
Edited Events :Product: 20030802events.txt :Created: 2003 Aug
05 0302 UT :Date: 2003 08 02 # Prepared by the U.S. Dept. of
Commerce, NOAA, Space Environment Center. # Please send comments
and suggestions to [email protected] # # Missing data: //// #
Updated every 30 minutes. # Edited Events for 2003 Aug 02 # #Event
Begin Max End Obs Q Type Loc/Frq Particulars Reg#
#-------------------------------------------------------------------------------
1910 + 1529 1537 1545 G12 5 XRA 1-8A B8.1 6.3E-04 0424 1910 1533
1534 1553 HOL 3 FLA S17E71 SF 0424 1920 1604 1609 1617 HOL 3 FLA
S18E70 SF 0424 1930 1625 1650 1726 HOL 3 FLA S18E68 SF 0424 1930 +
1637 1642 1650 G12 5 XRA 1-8A C1.1 7.6E-04 0424 1940 + 1653 1653
1655 SAG G RBR 245 100 1950 1713 1714 1714 PAL G RBR 245 87 1960 +
1727 1736 1744 G12 5 XRA 1-8A C4.5 3.1E-03 0424 1960 1730 1734 1759
HOL 3 FLA S17E68 1F 0424 1960 1733 1733 1734 PAL G RBR 245 56 0424
1970 1839 1839 1839 PAL G RBR 245 110 1980 + 1905 1918 1925 G12 5
XRA 1-8A B7.1 7.5E-04 0424 1980 1917 1936 2005 HOL 3 FLA S17E67 SF
0424 1990 + 1930 1946 1954 G12 5 XRA 1-8A C5.9 5.9E-03 0424 2000 +
2112 2134 2140 G12 5 XRA 1-8A C3.8 3.1E-03 0424 2000 + 2115 2115
2115 PAL G RBR 245 270 0424 2000 2116 2132 2156 HOL 3 FLA S17E66 SF
0424 2020 + 2249 2256 2303 G12 5 XRA 1-8A B9.0 5.9E-04 0424 2040 +
2341 2354 0002 G12 5 XRA 1-8A M1.3 8.5E-03 0424 2040 + 2345 2351
0031 LEA 3 FLA S17E63 1F ERU 0424
http://www.sec.noaa.gov/ftpdir/indices/2003_events/20030802events.txt
San Leandro High School Observation Dates: 01-Oct-03 01-Dec-03
Teacher: Mr. Rick Styner Model: SID_Beta-1
Slide 18
Chabot College Observation Dates: 25-Nov-03 29-Dec-03 Teacher:
Mr. Timothy Dave Model: SID-Beta-0
Slide 19
Castro Valley High School Observation Dates: 10-May-04 ?
Teacher: Mr. Sean Fottrell Model: SID_Beta-1
Slide 20
SID Sudden Ionosphere Disturbance Next Steps
Slide 21
Next Steps Build more Monitors Printed Circuit Board Layout and
Design Assembly / Electronics: Chabot College Software: Computer
Science students Cal. State University, Hayward Stanford
University: Data storage & analysis tools Involve teachers to
develop lessons plans Classroom activities Improve collaboration
among the schools Tour more schools
