Cosmic Rays Long Term Record Cosmic ray database begins in 1951. They have an inverse solar cycle...
4
Cosmic Rays Long Term Record 1953 1957 1961 1965 1969 1973 1977 1981 1985 1989 1993 1997 2001 2005 300 350 400 450 Monthly Mean Counts/Hour/1000 0 75 150 225 Smoothed Sunspot Number Cosmic Ray Counts and Smoothed Sunspot Numbers 1953 1957 1961 1965 1969 1973 1977 1981 1985 1989 1993 1997 2001 2005 300 350 400 450 Monthly Mean Counts/Hour/1000 0 75 150 225 Smoothed Sunspot Number Cosmic Ray Counts (Inverted) and Smoothed Sunspot Numbe Cosmic ray databas e begins in 1951. They have an inverse solar cycle behavio r. Earli er data exist . FY07 Cosmic Rays -- new
-
Upload
regina-bryan -
Category
Documents
-
view
213 -
download
0
Transcript of Cosmic Rays Long Term Record Cosmic ray database begins in 1951. They have an inverse solar cycle...
Cosmic Rays Long Term Record
1953 1957 1961 1965 1969 1973 1977 1981 1985 1989 1993 1997 2001 2005
300
350
400
450
Mo
nth
ly M
ea
n C
ou
nts/H
ou
r/1
00
0
0
75
150
225
Sm
oo
th
ed
Su
nsp
ot N
um
be
r
Cosmic Ray Counts and Smoothed Sunspot Numbers
1953 1957 1961 1965 1969 1973 1977 1981 1985 1989 1993 1997 2001 2005
300
350
400
450
Mo
nth
ly M
ea
n C
ou
nts/H
ou
r/1
00
0
0
75
150
225
Sm
oo
th
ed
Su
nsp
ot N
um
be
r
Cosmic Ray Counts (Inverted) and Smoothed Sunspot Numbers
Cosmic ray database begins in 1951. They have an inverse solar cycle behavior.
Earlier data exist.
FY07 Cosmic Rays -- new
Migration of historical cosmic ray observations on photographic charts and published bi-hourly values to digital format
FY07 Cosmic Rays -- new
Archives from Scott Forbush, early cosmic ray scientist
Cosmic ray ionization chamber data available beginning in 1936
Six worldwide stations monitoring systemCheltenham (later replaced by Fredericksburg), Maryland; Christchurch, New Zealand; Godhavn, Greenland; Climax, Colorado; Huancayo, Peru; and Mexico City, Mexico for the time period 1936-1959
Proposal:
Digitize in 2 minute intervals -- annual bundles of strip charts
Each day is about 24 inches long by 2 inches wide – 1 hour/inchDr. Ken McCracken will help with timing issues.
CDMP Cosmic Ray Digitization Project
FY07 Cosmic Rays -- new
Cosmic Ray legacy data
The ionization chamber adds up the ionization on a capacitor, i.e., it gives a time integral of the cosmic ray flux.
Nine boxes of photographic charts
Every hour the capacitor is shorted out- -that is the step you see every hour on the charts.
Cosmic Ray legacy data• contain important information never made public • highly relevant to modern day scientific studies
Photographic charts:• 9 boxes of 114 station years data, thus 70 Mbytes of data total
from 2 minute digitization.• PDF scans would also be valuable before discarding data
Bi-hourly data in books keyed in: (1140 station months, plus summary tables)
Huancayo 1936-68Cheltenham/Fredericksburg 1936-68Christchurch 1947-61Godhavn 1947-Jul 59Mexico Jul 1957-58
FY07 Cosmic Rays -- new
