Solar Energetic Particle Fluences					
April 18, 2001 Event					
Based on Data from ACE/EPAM; GOES-8,11,&12; and SAMPEX/PET					
					
Note: Statistical Uncertainties on GOES and EPAM data are negligible.					
To account for systematic uncertainties in combining data from different					
   sensors we add 20% in quadrature with the statistical uncertainties					
					
Fluence Spectra					
Start: 	0200 UT on 4/18/2001				
End:	2400 UT on 4/21/2001				
					
Compiled by R. A. Mewaldt (RMewaldt@srl.caltech.edu)					
	with help from Mark Looper, Christina Cohen, and Dennis Haggerty				
					
				Statistical		
Z	E	Fluence		Sigma		20% sigma	Instrument
1	0.0853	1.41E+09	Negligible	2.82E+08	EPAM
1	0.145	8.21E+08	Negligible	1.64E+08	
1	0.241	3.59E+08	Negligible	7.18E+07	
1	0.424	1.86E+08	Negligible	3.72E+07	
1	0.784	9.04E+07	Negligible	1.81E+07	
1	1.42	3.73E+07	Negligible	7.46E+06	
1	3.01	1.13E+07	Negligible	2.26E+06	
					
1	17.3	5.73E+05	Negligible	1.15E+05	GOES11-Int
1	38.7	9.95E+04	Negligible	1.99E+04	
1	54.8	3.98E+04	Negligible	7.96E+03	
1	77.5	1.59E+04	Negligible	3.18E+03	
					
1	20.0	4.38E+05	4.53E+03	8.77E+04	PET
1	22.1	4.07E+05	4.48E+03	8.15E+04	
1	24.2	3.30E+05	4.15E+03	6.61E+04	
1	26.3	3.46E+05	4.11E+03	6.93E+04	
1	32.0	1.85E+05	1.50E+03	3.70E+04	
1	41.4	5.01E+04	9.02E+02	1.01E+04	
1	49.3	3.98E+04	9.13E+02	8.01E+03	
1	58.8	2.54E+04	6.36E+02	5.12E+03	
1	67.8	2.14E+04	8.21E+02	4.36E+03	
1	73.3	1.66E+04	7.71E+02	3.41E+03	
1	80.5	1.67E+04	6.55E+02	3.40E+03	
1	101.1	5.97E+03	2.36E+02	1.22E+03	
1	154.9	3.89E+03	1.22E+02	7.88E+02	
1	245.0	1.27E+03	5.98E+01	2.61E+02	
1	387.3	3.85E+02	2.30E+01	8.04E+01