LK Huang, Nov 2005
Updated N18 calibration as in A&E report.
Updated N18 IRR23a bias and IRR23c bias relative to the polynomial as in earth 
view IRR23 measurements, which is ignored in A&E report.  

-rw-r--r--    1 huang    user        1187 Nov 10 18:02 ../../code_xchn/flux_n18.f
-rw-r--r--    1 huang    user        1051 Nov 10 17:42 ../../code_xchn/rcal_n18.f
-rw-r--r--    1 huang    user        2469 Nov 10 17:27 ../../code_xchn/pmtc18.f
-rw-r--r--    1 huang    user        1626 Nov 10 17:03 ../../code_xchn/offset_n18.f
-rw-r--r--    1 huang    user        3844 Nov  9 16:47 ../../code_xchn/irr_n17.f
-rw-r--r--    1 huang    user        2768 Nov  8 16:16 ../../code_xchn/irr_n18.