  TABLE 3 ESTIMATES OF 13-MONTH SMOOTH SOLAR ACTIVITY FOR
               BALANCE OF CYCLE 23 CYCLE 24 AND BEGINNING OF CYCLE 25

    TIME         10.7 CM SOLAR FLUX   (F10.7)      GEOMAGNETIC INDEX   (Ap)
                         PERCENTILE                    PERCENTILE                    
                  95.0%       50%      5.0%     95.0%       50%      5.0%    

 1999.5840   AUG   160.4     156.1     152.8      13.1      12.8      12.3     
 1999.6673   SEP   168.0     157.7     150.9      13.9      12.9      12.1     
 1999.7507   OCT   175.2     159.0     149.5      14.9      13.0      11.6     
 1999.8340   NOV   180.2     159.9     148.9      15.2      13.2      11.3     
 1999.9173   DEC   186.4     160.6     147.8      15.5      13.5      11.3     
 2000.0007   JAN   190.8     160.9     144.9      16.4      13.8      11.5     
 2000.0840   FEB   194.0     161.1     141.4      16.7      14.2      11.8     
 2000.1673   MAR   196.8     161.3     138.2      16.9      14.5      11.5     
 2000.2507   APR   199.2     161.1     135.4      16.9      14.6      11.2     
 2000.3340   MAY   203.3     161.0     133.3      17.2      14.6      10.8     
 2000.4173   JUN   203.9     160.0     132.6      17.8      14.7      10.6     
 2000.5007   JUL   199.5     158.3     132.1      18.5      14.8      10.2     
 2000.5840   AUG   194.8     156.9     129.5      18.7      14.9       9.8     
 2000.6673   SEP   193.9     155.9     125.9      18.4      14.8       9.0     
 2000.7507   OCT   194.9     155.5     124.6      17.9      14.6       8.4     
 2000.8340   NOV   195.3     155.4     124.7      18.2      14.6       8.3     
 2000.9173   DEC   195.3     155.1     124.0      18.6      14.6       8.3     
 2001.0007   JAN   194.2     154.6     124.2      19.3      14.5       7.9     
 2001.0840   FEB   192.0     154.0     121.7      19.3      14.2       7.6     
 2001.1673   MAR   188.1     153.4     117.9      18.7      14.0       7.8     
 2001.2507   APR   183.3     152.9     115.7      18.5      14.0       8.3     
 2001.3340   MAY   180.0     152.6     113.9      18.3      14.0       8.7     
 2001.4173   JUN   177.7     151.8     112.2      17.9      13.9       9.0     
 2001.5007   JUL   179.5     150.6     110.9      17.9      13.9       9.2     
 2001.5840   AUG   180.0     148.9     108.4      17.6      13.9       9.3     
 2001.6673   SEP   179.2     147.2     106.8      17.2      14.1       9.5     
 2001.7507   OCT   179.0     145.9     105.3      17.5      14.5      10.3     
 2001.8340   NOV   179.7     144.8     104.3      17.7      14.5      10.7     
 2001.9173   DEC   180.8     143.3     103.6      17.4      14.3      10.4     
 2002.0007   JAN   180.7     141.4     102.9      18.2      14.4      10.8     
 2002.0840   FEB   178.3     139.2     102.3      19.6      14.8      11.2     
 2002.1673   MAR   176.1     137.5     100.7      20.8      15.1      11.4     
 2002.2507   APR   175.8     136.1      99.3      21.4      15.3      11.6     
 2002.3340   MAY   174.9     134.4      97.6      22.5      15.5      11.7     
 2002.4173   JUN   172.9     132.4      94.9      22.9      15.7      11.4     
 2002.5007   JUL   169.8     130.5      92.1      22.3      15.8      11.5     
 2002.5840   AUG   166.1     129.0      90.9      22.3      15.7      11.4     
 2002.6673   SEP   162.6     127.7      90.8      21.6      15.7      11.2     
 2002.7507   OCT   160.8     126.4      90.9      19.8      15.7      11.1     
 2002.8340   NOV   159.7     125.1      90.7      18.9      15.7      11.1     
 2002.9173   DEC   156.7     123.1      90.2      19.9      15.9      11.2     
 2003.0007   JAN   151.3     120.8      89.6      20.1      15.9      11.4     
 2003.0840   FEB   146.5     118.7      88.2      19.9      15.8      11.2     
 2003.1673   MAR   144.0     116.6      87.2      19.8      15.6      11.2     
 2003.2507   APR   142.7     114.4      84.8      19.2      15.5      11.3     
 2003.3340   MAY   140.8     112.6      83.1      19.5      15.7      11.4     
 2003.4173   JUN   138.3     111.1      82.5      20.2      15.9      11.5     
 2003.5007   JUL   135.8     109.5      82.0      20.2      16.1      11.5     
 2003.5840   AUG   133.1     107.7      81.2      20.0      16.3      11.4     
 2003.6673   SEP   130.2     106.1      79.5      19.9      16.4      11.3     
 2003.7507   OCT   130.0     104.4      77.0      19.7      16.4      11.0     
 2003.8340   NOV   128.7     102.6      75.6      19.8      16.4      11.0     
 2003.9173   DEC   126.3     101.0      74.9      20.3      16.4      11.2     
 2004.0007   JAN   125.4      99.6      73.8      20.8      16.5      11.8     
 2004.0840   FEB   124.3      98.4      73.0      21.0      16.8      12.3     
 2004.1673   MAR   122.1      97.4      72.6      20.6      17.0      12.4     
 2004.2507   APR   120.1      96.6      72.4      21.1      17.0      12.4     
 2004.3340   MAY   118.7      95.6      71.9      22.0      16.9      12.4     
 2004.4173   JUN   118.0      94.3      71.2      22.3      16.7      12.5     
 2004.5007   JUL   116.9      93.1      70.7      22.1      16.6      13.3     
 2004.5840   AUG   114.6      91.8      70.3      21.7      16.7      12.7     
 2004.6673   SEP   111.3      90.5      70.4      22.0      16.9      12.5     
 2004.7507   OCT   107.7      89.2      70.6      21.7      16.8      12.2     
 2004.8340   NOV   104.6      88.1      70.9      21.6      16.6      11.7     
 2004.9173   DEC   103.6      87.3      70.9      21.7      16.3      11.3     
 2005.0007   JAN   102.3      86.4      70.9      21.7      15.9      10.7     
 2005.0840   FEB   101.0      85.3      71.2      22.1      15.6       9.5     
 2005.1673   MAR    98.9      84.1      71.2      22.4      15.3       8.4     
 2005.2507   APR    96.6      83.0      70.7      22.7      15.2       8.1     
 2005.3340   MAY    95.6      82.1      70.9      22.9      15.2       7.9     
 2005.4173   JUN    94.0      81.3      70.8      23.1      15.1       7.7     
 2005.5007   JUL    92.6      80.6      70.7      22.8      15.0       7.7     
 2005.5840   AUG    91.3      79.9      70.4      22.3      14.9       7.9     
 2005.6673   SEP    90.0      79.1      70.2      21.5      14.7       8.3     
 2005.7507   OCT    88.7      78.4      69.9      20.8      14.6       8.7     
 2005.8340   NOV    87.4      77.7      69.7      20.6      14.7       8.9     
 2005.9173   DEC    86.1      77.0      69.4      20.4      14.9       9.0     
 2006.0007   JAN    84.9      76.3      69.2      20.4      15.2       9.5     
 2006.0840   FEB    83.7      75.6      69.0      20.2      15.3      10.0     
 2006.1673   MAR    82.5      75.0      68.8      19.9      15.3      10.3     
 2006.2507   APR    81.4      74.3      68.5      20.1      15.2      10.6     
 2006.3340   MAY    80.3      73.7      68.3      20.2      15.0      11.1     
 2006.4173   JUN    79.3      73.2      68.1      20.3      14.8      11.8     
 2006.5007   JUL    78.3      72.6      68.0      19.9      14.7      11.7     
 2006.5840   AUG    77.4      72.1      67.8      19.5      14.6      11.6     
 2006.6673   SEP    76.6      71.7      67.6      18.9      14.6      11.4     
 2006.7507   OCT    75.9      71.3      67.5      18.1      14.7      11.1     
 2006.8340   NOV    75.2      70.9      67.4      18.0      14.7      10.4     
 2006.9173   DEC    74.6      70.6      67.3      17.9      14.5      10.2     
 2007.0007   JAN    74.1      70.3      67.2      17.8      14.4      10.1     
 2007.0840   FEB    73.8      70.1      67.1      17.4      14.3      10.1     
 2007.1673   MAR    73.5      69.9      67.0      17.1      14.3      10.2     
 2007.2507   APR    73.3      69.8      67.0      16.6      13.8       9.9     
 2007.3340   MAY    73.2      69.8      67.0      16.0      13.3       9.6     
 2007.4173   JUN    73.4      69.9      67.1      15.5      12.9       9.3     
 2007.5007   JUL    74.0      70.3      67.3      15.0      12.4       9.1     
 2007.5840   AUG    74.8      70.7      67.4      14.5      12.0       8.8     
 2007.6673   SEP    75.7      71.0      67.5      14.0      11.6       8.5     
 2007.7507   OCT    76.7      71.5      67.6      13.6      11.2       8.3     
 2007.8340   NOV    78.3      72.0      67.9      13.2      10.8       8.0     
 2007.9173   DEC    79.6      72.7      68.1      12.8      10.5       7.8     
 2008.0007   JAN    81.1      73.3      68.2      12.4      10.1       7.6     
 2008.0840   FEB    83.4      74.2      68.2      12.1       9.9       7.5     
 2008.1673   MAR    86.5      75.1      68.3      11.8       9.6       7.3     
 2008.2507   APR    91.3      76.3      68.3      11.5       9.4       7.2     
 2008.3340   MAY    95.8      77.7      68.3      11.4       9.2       7.1     
 2008.4173   JUN    99.3      79.1      68.6      11.2       9.1       7.0     
 2008.5007   JUL   104.6      80.8      68.6      11.1       9.0       6.9     
 2008.5840   AUG   110.7      82.8      68.7      11.1       9.0       6.9     
 2008.6673   SEP   116.6      84.9      68.9      11.3       9.1       6.9     
 2008.7507   OCT   124.0      87.2      68.9      11.6       9.3       7.1     
 2008.8340   NOV   132.5      89.6      69.0      11.7       9.4       7.4     
 2008.9173   DEC   139.0      92.2      69.4      11.9       9.5       7.5     
 2009.0007   JAN   143.6      95.0      69.8      12.0       9.6       7.5     
 2009.0840   FEB   147.9      97.8      70.1      12.1       9.6       7.3     
 2009.1673   MAR   152.2     100.6      70.8      12.2       9.7       7.2     
 2009.2507   APR   157.0     103.3      71.2      12.6       9.8       7.0     
 2009.3340   MAY   162.1     106.3      71.4      12.9      10.1       6.9     
 2009.4173   JUN   167.2     109.5      72.1      13.3      10.5       7.1     
 2009.5007   JUL   171.5     112.8      72.7      13.8      10.8       7.5     
 2009.5840   AUG   177.3     115.9      73.3      14.6      11.1       7.8     
 2009.6673   SEP   185.2     119.0      74.0      15.8      11.4       7.6     
 2009.7507   OCT   190.2     122.2      74.3      16.2      11.6       7.6     
 2009.8340   NOV   192.8     125.1      74.6      16.4      11.7       7.5     
 2009.9173   DEC   195.4     127.5      75.0      16.9      11.9       7.5     
 2010.0007   JAN   198.3     129.7      75.3      18.1      12.2       7.5     
 2010.0840   FEB   202.9     131.9      75.5      19.0      12.6       7.6     
 2010.1673   MAR   209.1     134.3      75.5      19.2      12.8       7.6     
 2010.2507   APR   213.2     136.8      75.1      19.3      13.0       7.7     
 2010.3340   MAY   215.9     139.1      74.9      19.1      13.2       7.6     
 2010.4173   JUN   220.4     141.2      75.2      18.7      13.3       7.6     
 2010.5007   JUL   225.0     143.1      75.5      18.6      13.3       7.7     
 2010.5840   AUG   227.3     144.9      76.3      19.0      13.5       7.9     
 2010.6673   SEP   228.4     146.5      77.5      18.9      13.6       8.1     
 2010.7507   OCT   230.3     147.9      78.2      17.9      13.6       8.5     
 2010.8340   NOV   232.4     148.8      79.1      18.0      13.8       8.6     
 2010.9173   DEC   235.4     149.7      80.7      18.6      14.1       8.6     
 2011.0007   JAN   238.7     150.1      82.6      19.2      14.3       8.9     
 2011.0840   FEB   240.3     150.5      84.7      19.7      14.8       9.3     
 2011.1673   MAR   238.7     150.8      85.9      20.4      15.1       9.5     
 2011.2507   APR   236.9     151.0      86.9      20.4      15.2       9.5     
 2011.3340   MAY   238.1     151.2      88.8      20.4      15.2       9.7     
 2011.4173   JUN   238.7     150.6      90.2      20.6      15.2       9.9     
 2011.5007   JUL   236.3     149.2      92.2      20.9      15.4      10.4     
 2011.5840   AUG   232.9     148.1      93.5      21.3      15.4      11.0     
 2011.6673   SEP   229.2     147.5      94.0      21.3      15.3      11.6     
 2011.7507   OCT   227.4     147.4      95.3      21.5      15.1      11.2     
 2011.8340   NOV   227.8     147.4      95.6      21.7      15.1      11.1     
 2011.9173   DEC   227.9     147.1      95.2      22.1      15.1      10.6     
 2012.0007   JAN   226.5     146.7      95.3      22.9      15.0      10.1     
 2012.0840   FEB   224.8     146.3      96.8      22.6      14.7       9.8     
 2012.1673   MAR   224.3     145.7      97.5      21.4      14.4      10.0     
 2012.2507   APR   224.2     145.2      97.1      20.7      14.3      10.0     
 2012.3340   MAY   223.6     144.8      96.3      20.1      14.2      10.2     
 2012.4173   JUN   222.6     144.0      96.3      19.7      14.1      10.5     
 2012.5007   JUL   220.3     143.0      96.8      19.6      14.1      10.5     
 2012.5840   AUG   216.8     141.4      95.9      19.4      14.1      10.4     
 2012.6673   SEP   213.9     139.8      95.4      19.2      14.4      10.4     
 2012.7507   OCT   211.1     138.6      96.2      19.0      14.7      10.4     
 2012.8340   NOV   207.6     137.6      97.2      19.0      14.9      10.2     
 2012.9173   DEC   206.6     136.3      96.2      19.5      14.8       9.8     
 2013.0007   JAN   204.5     134.6      94.6      20.5      14.9      10.1     
 2013.0840   FEB   201.1     132.8      93.9      22.1      15.3      10.6     
 2013.1673   MAR   197.5     131.4      93.6      23.5      15.6      10.6     
 2013.2507   APR   195.2     130.3      91.9      24.1      15.8      10.8     
 2013.3340   MAY   193.4     128.9      88.5      25.3      16.1      10.9     
 2013.4173   JUN   189.6     127.1      87.7      25.8      16.3      11.1     
 2013.5007   JUL   185.1     125.5      88.8      25.0      16.3      11.4     
 2013.5840   AUG   180.7     124.2      88.3      24.9      16.2      11.6     
 2013.6673   SEP   176.8     123.1      87.0      24.1      16.2      11.7     
 2013.7507   OCT   174.6     122.0      86.0      22.2      16.1      11.7     
 2013.8340   NOV   172.7     120.8      85.7      22.5      16.2      11.9     
 2013.9173   DEC   168.6     119.2      84.8      23.2      16.3      11.7     
 2014.0007   JAN   162.0     117.2      83.5      23.3      16.3      10.9     
 2014.0840   FEB   156.1     115.4      82.5      22.8      16.1      10.6     
 2014.1673   MAR   152.5     113.5      81.9      22.1      15.9      10.7     
 2014.2507   APR   150.3     111.5      81.9      22.0      15.9      10.7     
 2014.3340   MAY   148.0     109.8      81.6      22.9      16.1      10.6     
 2014.4173   JUN   145.1     108.3      80.4      23.8      16.4      10.7     
 2014.5007   JUL   142.0     106.9      80.5      24.0      16.6      10.7     
 2014.5840   AUG   138.4     105.4      80.2      24.0      16.8      10.6     
 2014.6673   SEP   134.5     103.9      79.5      24.0      16.9      10.5     
 2014.7507   OCT   130.1     102.4      79.0      23.6      16.9      10.2     
 2014.8340   NOV   124.1     100.8      78.2      22.7      16.9      10.3     
 2014.9173   DEC   119.1      99.3      77.1      22.9      16.8      10.5     
 2015.0007   JAN   118.2      98.0      75.4      23.1      16.9      11.3     
 2015.0840   FEB   118.7      96.9      74.3      23.2      17.2      11.8     
 2015.1673   MAR   119.3      95.9      73.6      22.6      17.3      11.9     
 2015.2507   APR   119.6      95.0      72.8      21.6      17.2      12.1     
 2015.3340   MAY   118.8      94.0      71.8      21.3      17.1      12.2     
 2015.4173   JUN   117.4      92.9      71.3      21.8      16.9      12.4     
 2015.5007   JUL   116.0      91.8      70.8      21.8      16.7      13.2     
 2015.5840   AUG   113.9      90.7      70.4      22.2      16.8      13.0     
 2015.6673   SEP   110.2      89.5      70.3      22.6      16.9      12.7     
 2015.7507   OCT   105.1      88.2      70.4      22.4      16.9      13.0     
 2015.8340   NOV   102.7      87.3      70.2      22.4      16.7      12.7     
 2015.9173   DEC   101.7      86.6      70.1      22.8      16.5      12.4     
 2016.0007   JAN   100.2      85.8      70.2      23.0      16.1      12.0     
 2016.0840   FEB    98.1      84.7      70.1      23.6      15.8      11.1     
 2016.1673   MAR    96.3      83.6      70.3      24.2      15.6      10.4     
 2016.2507   APR    94.5      82.5      69.8      25.0      15.5      10.5     
 2016.3340   MAY    93.4      81.8      69.6      25.5      15.5      10.6     
 2016.4173   JUN    92.1      81.0      69.4      25.7      15.5      10.5     
 2016.5007   JUL    91.7      80.3      69.3      25.6      15.4      10.6     
 2016.5840   AUG    91.1      79.5      69.0      25.0      15.3      10.9     
 2016.6673   SEP    90.5      78.8      68.7      24.1      15.1      11.0     
 2016.7507   OCT    89.8      78.1      68.4      23.1      14.9      11.2     
 2016.8340   NOV    88.9      77.5      68.3      22.6      15.0      11.1     
 2016.9173   DEC    88.0      77.0      68.3      22.2      15.2      11.0     
 2017.0007   JAN    87.1      76.4      68.2      21.9      15.4      11.1     
 2017.0840   FEB    85.8      75.9      68.0      21.5      15.5      11.3     
 2017.1673   MAR    84.4      75.4      67.7      20.8      15.5      11.4     
 2017.2507   APR    82.3      74.8      67.5      20.0      15.3      11.4     
 2017.3340   MAY    79.9      74.2      67.6      20.1      15.1      11.7     
 2017.4173   JUN    78.4      73.5      67.4      20.2      14.9      11.9     
 2017.5007   JUL    77.5      72.9      67.3      19.9      14.7      11.6     
 2017.5840   AUG    77.0      72.4      67.2      19.5      14.6      11.5     
 2017.6673   SEP    76.9      72.0      67.2      19.0      14.6      11.1     
 2017.7507   OCT    76.7      71.6      67.2      18.2      14.6      10.6     
 2017.8340   NOV    76.5      71.3      67.1      17.3      14.5       9.8     
 2017.9173   DEC    76.2      71.0      67.1      17.4      14.4       9.4     
 2018.0007   JAN    75.2      70.7      67.0      17.5      14.3       9.3     
 2018.0840   FEB    74.2      70.4      67.0      17.6      14.2       9.3     
 2018.1673   MAR    74.0      70.1      67.0      17.6      14.1       9.3     
