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Sudden Ionosphere Disturbance. Stanford Solar Center http://solar-center.stanford.edu/sid.html. Version 2.0 Slides by Ray Mitchell. SID Sudden Ionosphere Disturbance. Theory of Operation. The Sun, Ionosphere, and Radio waves.

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sudden ionosphere disturbance

Sudden Ionosphere Disturbance

Stanford Solar Center

http://solar-center.stanford.edu/sid.html

Version 2.0

Slides by Ray Mitchell

navy radio station jim creek wa nlk 24 8khz

Source: http://www.cmsstudios.com/fly2k/99flights/images/ebbyjm.jpg

Navy Radio Station, Jim Creek, WA“NLK” 24.8KHz

Antenna Wires

200’ Towers

about 24 8 khz

Sound file

About 24.8 KHz

Amplitude (Peak-to-Peak)

 Radio Signal 

1 Cycle = 7.5 Miles (12 KM)

 Distance traveled over time 

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

the sid shed reference
The “SID” Shed (Reference)

Tuned loop Antenna

Observation Dates:

(Approx) 24-Jul-03 – Present date

Located in Stanford Hills next to

The Wilcox Solar Observatory

prototype sid monitor antenna
Prototype SID Monitor & Antenna

Pre-Amp

DataQ

Post-Amp

Box Dimensions:

4”w X 10”L X 3”h

30”square, 50 turns of #26 wire

Connected with RG-58 Coax

Model: SID_Beta-1

sid monitor block diagram
SID Monitor: Block Diagram

Pre-Amp

All frequencies

Coax

24.8KHz

Filter

Band-pass, Only 24.8KHz

(Amplitude Modulation)

DC voltage

Level

Signal

Strength

=

10 bit,

Analog to Digital

Conversion

DATAQ

Computer

Sample every

5 Seconds

RS-232

normal 24 hr day no flares
Normal 24 Hr. Day (No flares)

LocalNoon

Nighttime

Sunset

Daytime

Sunrise

Nighttime

Time in UT

detecting solar flares sid s
Detecting Solar Flares – SID(s)

SID Events!

However, not all SID events are explainable. Research is needed to help answer “What are these events?”

edited events
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 sec@sec.noaa.gov

#

# 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

sunspots active regions
Sunspots (Active Regions)

#Event Begin Max End Obs Q Type Loc/Frq Particulars Reg#

#-------------------------------------------------------------------------------

1960 + 1727 1736 1744 G12 5 XRA 1-8A C4.5 3.1E-03 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

2040 + 2341 2354 0002 G12 5 XRA 1-8A M1.3 8.5E-03 0424

san leandro high school
San Leandro High School

Observation Dates:

01-Oct-03 – 01-Dec-03

Teacher: Mr. Rick Styner

Model: SID_Beta-1

chabot college
Chabot College

Observation Dates:

25-Nov-03 – 29-Dec-03

Teacher: Mr. Timothy Dave

Model: SID-Beta-0

castro valley high school
Castro Valley High School

Observation Dates:

10-May-04 – ?

Teacher: Mr. Sean Fottrell

Model: SID_Beta-1

next steps
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