124 1010
Coffey, Michael T. and James W. Hannigan
National Center for Atmospheric Research, Boulder, CO, USA 
Fourier transform spectrometer (FTS) from the T1 site in MILAGRO 
Observation date:20060308
1 1
2006 03 11   2006 03 11
0
Time (UT), seconds after 00:00 of observation date   
52
1e+12 1e+12 1e+16 1e+16 1e+13 1e+13 1e+16 1e+16 1e+17 1e+17 1e+15 1e+15 
1e+13 1e+13 1e+13 1e+13 1e+18 1e+18 1e+19 1e+19 1e+13 1e+13 1e+13 1e+13 
1e+13 1e+13 1e+13 1e+13 1e+17 1e+17 1e+17 1e+17 1e+13 1e+13 1e+13 1e+13 
1e+12 1e+12 1e+13 1e+13 1e+13 1e+13 1e+13 1e+13 1e+13 1e+13 1e+13 1e+13 
1e+13 1e+13 1e+13 1e+13  
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999  
HF vertical column amount [molecules/cm**2]
HF estimated error in total column [molecules/cm**2]
O3 vertical column amount [molecules/cm**2]
O3 estimated error in total column [molecules/cm**2]
HCL vertical column amount [molecules/cm**2]
HCL estimated error in total column [molecules/cm**2]
N2O vertical column amount [molecules/cm**2]
N2O estimated error in total column [molecules/cm**2]
CH4 vertical column amount [molecules/cm**2]
CH4 estimated error in total column [molecules/cm**2]
CO vertical column amount [molecules/cm**2]
CO estimated error in total column [molecules/cm**2]
HNO3 vertical column amount [molecules/cm**2]
HNO3 estimated error in total column [molecules/cm**2]
CLONO2 vertical column amount [molecules/cm**2]
CLONO2 estimated error in total column [molecules/cm**2]
H2O vertical column amount [molecules/cm**2]
H2O estimated error in total column [molecules/cm**2]
N2 vertical column amount [molecules/cm**2]
N2 estimated error in total column [molecules/cm**2]
COF2 vertical column amount [molecules/cm**2]
COF2 estimated error in total column [molecules/cm**2]
NO vertical column amount [molecules/cm**2]
NO estimated error in total column [molecules/cm**2]
NO2 vertical column amount [molecules/cm**2]
NO2 estimated error in total column [molecules/cm**2]
CCL2F2 vertical column amount [molecules/cm**2]
CCL2F2 estimated error in total column [molecules/cm**2]
HDO vertical column amount [molecules/cm**2]
HDO estimated error in total column [molecules/cm**2]
CH3D vertical column amount [molecules/cm**2]
CH3D estimated error in total column [molecules/cm**2]
C2H6 vertical column amount [molecules/cm**2]
C2H6 estimated error in total column [molecules/cm**2]
OCS vertical column amount [molecules/cm**2]
OCS estimated error in total column [molecules/cm**2]
H2CO vertical column amount [molecules/cm**2]
H2CO estimated error in total column [molecules/cm**2]
HCN vertical column amount [molecules/cm**2]
HCN estimated error in total column [molecules/cm**2]
CCL3F vertical column amount [molecules/cm**2]
CCL3F estimated error in total column [molecules/cm**2]
C3H8 vertical column amount [molecules/cm**2]
C3H8 estimated error in total column [molecules/cm**2]
C2H2 vertical column amount [molecules/cm**2]
C2H2 estimated error in total column [molecules/cm**2]
NH3 vertical column amount [molecules/cm**2]
NH3 estimated error in total column [molecules/cm**2]
C2H4 vertical column amount [molecules/cm**2]
C2H4 estimated error in total column [molecules/cm**2]
PAN vertical column amount [molecules/cm**2]
PAN estimated error in total column [molecules/cm**2]
11
1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0
9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999
Day of year of observation
Year of observation 
Month of observation 
Day of observation 
Hour of observation 
Minute of observation 
Second of observation 
Latitude of observation (degree N)
Longitude of observation (degree W)
Altitude of observation (km)       
Solar zenith angle (degree)
29
Data were taken by a 0.06cm-1 resolution Fourier transform spectrometer (FTS) operated
from a trailer situated(usually) at the T1 site of MILAGRO (19.7 N, 98.98 W).  The absorption
of infrared solar radiation along a slant path to the sun is recorded from 2 to 15 micrometers.
Two spectral filters are used to cover the region from 2-15 microns.  An interferogram is 
recorded in about 10 seconds.  Interferograms are transformed to produce spectra.  Column
amounts are retrieved by fitting the observed spectra using the non-linear least squares 
fitting code, SFIT2, that employs an Optimal Estimation retrieval algorithm.  Version 3.92 
of the SFIT2 code was used. The HITRAN absorption line list with updates to 2004 is used
in the forward calculation.  An average temperature profile was derived from NCEP analyses.  
Observations were made during sunlit hours throughout the day.  Vertical column amounts
are reported above the observing location.  Details of the instrumentation and method may
be found in:

Airborne spectroscopic observations of chlorine activation and de-nitrification in the 
1999/2000 winter Arctic stratosphere during SOLVE, M. T. Coffey, W. G. Mankin,
J. W. Hannigan, and G. C. Toon, J. Geophys. Res., 107, 8303, 2002.

Intercomparison of retrieval codes used for the analysis of high-resolution, ground-based 
FTIR measurements, F. Hase, J. W. Hannigan, M. T. Coffey, A. Goldman, M. Hopfner, 
N. B. Jones, C. P. Rinsland, S. W. Wood, Quant. Spectrosc. Radiat. Transfer, 87, 25-52, 2004.  

Contacts:
Michael T. Coffey
James W. Hannigan
National Center for Atmospheric Research
PO Box 3000
Boulder, CO 80307
303 497 1407
coffey@ucar.edu, jamesw@ucar.edu
7
SECONDS(UT) DOY YEAR MONTH DAY  HOUR MIN SEC  LAT LON ALT SZA
     HF ERR      O3 ERR     HCL ERR     N2O ERR     CH4 ERR      CO ERR 
   HNO3 ERR  CLONO2 ERR     H2O ERR      N2 ERR    COF2 ERR      NO ERR 
    NO2 ERR  CCL2F2 ERR     HDO ERR    CH3D ERR    C2H6 ERR     OCS ERR 
   H2CO ERR     HCN ERR   CCL3F ERR    C3H8 ERR    C2H2 ERR     NH3 ERR 
   C2H4 ERR     PAN ERR 

056652 059 2006 03 08 15 44 12 +19.70 +98.98   2.27 51.23
99999 99999 99999 99999 99999 99999 99999 99999 00360 00046 02153 00355 
99999 99999 99999 99999 16269 03930 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01581 00261 00736 00106 
00486 00089 99999 99999 99999 99999 00359 00081 00131 00028 99999 99999 
99999 99999 99999 99999 
061016 059 2006 03 08 16 56 56 +19.70 +98.98   2.27 36.53
99999 99999 00723 00062 99999 99999 99999 99999 99999 99999 99999 99999 
00891 00082 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00783 00112 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00401 00058 99999 99999 99999 99999 01997 00439 
00113 00021 01430 00191 
061193 059 2006 03 08 16 59 53 +19.70 +98.98   2.27 36.00
99999 99999 99999 99999 99999 99999 99999 99999 00336 00043 01768 00276 
99999 99999 99999 99999 18480 04057 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01359 00220 00734 00106 
00480 00087 99999 99999 99999 99999 00353 00079 00123 00026 99999 99999 
99999 99999 99999 99999 
061508 059 2006 03 08 17 05 08 +19.70 +98.98   2.27 35.06
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
00883 00081 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00788 00112 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00395 00058 99999 99999 99999 99999 01722 00377 
00117 00022 01430 00191 
061686 059 2006 03 08 17 08 06 +19.70 +98.98   2.27 34.54
99999 99999 99999 99999 99999 99999 99999 99999 00356 00047 01670 00257 
99999 99999 99999 99999 18077 03957 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01273 00204 00745 00107 
00485 00089 99999 99999 99999 99999 00349 00078 00113 00024 99999 99999 
99999 99999 99999 99999 
062094 059 2006 03 08 17 14 55 +19.70 +98.98   2.27 33.38
99999 99999 99999 99999 99999 99999 99999 99999 00360 00046 01782 00278 
99999 99999 99999 99999 18581 04174 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01221 00200 00754 00108 
00475 00086 99999 99999 99999 99999 00353 00079 00127 00027 99999 99999 
99999 99999 99999 99999 
062332 059 2006 03 08 17 18 52 +19.70 +98.98   2.27 32.72
99999 99999 00715 00061 99999 99999 99999 99999 99999 99999 99999 99999 
00843 00077 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00781 00112 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00370 00054 99999 99999 99999 99999 01612 00352 
00109 00021 01430 00191 
062971 059 2006 03 08 17 29 31 +19.70 +98.98   2.27 31.04
99999 99999 00709 00060 99999 99999 99999 99999 99999 99999 99999 99999 
00835 00076 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00778 00111 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00357 00052 99999 99999 99999 99999 01583 00343 
00112 00021 01430 00191 
063335 059 2006 03 08 17 35 35 +19.70 +98.98   2.27 30.14
99999 99999 99999 99999 99999 99999 99999 99999 00379 00054 01675 00257 
99999 99999 99999 99999 17733 04076 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01285 00208 00772 00111 
00503 00094 99999 99999 99999 99999 00341 00076 00113 00024 99999 99999 
99999 99999 99999 99999 
064161 059 2006 03 08 17 49 21 +19.70 +98.98   2.27 28.29
99999 99999 99999 99999 99999 99999 99999 99999 00348 00046 01827 00287 
99999 99999 99999 99999 18525 04129 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01243 00199 00739 00107 
00491 00091 99999 99999 99999 99999 00349 00078 00129 00028 99999 99999 
99999 99999 99999 99999 
064355 059 2006 03 08 17 52 35 +19.70 +98.98   2.27 27.90
99999 99999 00694 00059 99999 99999 99999 99999 99999 99999 99999 99999 
00807 00073 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00761 00109 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00360 00052 99999 99999 99999 99999 99999 99999 
00114 00022 01430 00191 
073323 059 2006 03 08 20 22 03 +19.70 +98.98   2.27 33.72
99999 99999 00833 00074 99999 99999 99999 99999 99999 99999 99999 99999 
00651 00058 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00745 00106 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00358 00051 99999 99999 99999 99999 02412 00526 
00106 00020 01430 00191 
073520 059 2006 03 08 20 25 20 +19.70 +98.98   2.27 34.29
99999 99999 99999 99999 99999 99999 99999 99999 00353 00047 01681 00259 
99999 99999 99999 99999 18682 04402 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01268 00201 00762 00110 
00493 00091 99999 99999 99999 99999 00349 00078 00126 00027 99999 99999 
99999 99999 99999 99999 
073764 059 2006 03 08 20 29 24 +19.70 +98.98   2.27 34.99
99999 99999 00718 00061 99999 99999 99999 99999 99999 99999 99999 99999 
00731 00065 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00738 00104 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00364 00052 99999 99999 99999 99999 02174 00474 
00089 00016 01430 00191 
074238 059 2006 03 08 20 37 18 +19.70 +98.98   2.27 36.41
99999 99999 99999 99999 99999 99999 99999 99999 00332 00043 01689 00260 
99999 99999 99999 99999 19466 04607 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01290 00202 00783 00113 
00486 00089 99999 99999 99999 99999 00348 00078 00123 00027 99999 99999 
99999 99999 99999 99999 
074605 059 2006 03 08 20 43 25 +19.70 +98.98   2.27 37.54
99999 99999 99999 99999 99999 99999 99999 99999 00337 00043 01697 00262 
99999 99999 99999 99999 19154 03855 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 00840 00125 00762 00110 
00485 00089 99999 99999 99999 99999 00356 00080 00128 00028 99999 99999 
99999 99999 99999 99999 
074808 059 2006 03 08 20 46 48 +19.70 +98.98   2.27 38.17
99999 99999 00747 00064 99999 99999 99999 99999 99999 99999 99999 99999 
00512 00048 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00742 00105 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00369 00053 99999 99999 99999 99999 02491 00547 
00106 00020 01430 00191 
075841 059 2006 03 08 21 04 01 +19.70 +98.98   2.27 41.51
99999 99999 99999 99999 99999 99999 99999 99999 00332 00043 01685 00262 
99999 99999 99999 99999 19176 04129 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 00946 00150 00735 00106 
00482 00088 99999 99999 99999 99999 00358 00081 00121 00026 99999 99999 
99999 99999 99999 99999 
076296 059 2006 03 08 21 11 36 +19.70 +98.98   2.27 43.03
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
00704 00062 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00762 00108 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00384 00056 99999 99999 99999 99999 02913 00642 
00100 00019 01430 00191 
077837 059 2006 03 08 21 37 17 +19.70 +98.98   2.27 48.36
99999 99999 00862 00076 99999 99999 99999 99999 99999 99999 99999 99999 
00701 00062 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00776 00110 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00399 00058 99999 99999 99999 99999 02066 00449 
00103 00019 01430 00191 
078043 059 2006 03 08 21 40 43 +19.70 +98.98   2.27 49.09
99999 99999 99999 99999 99999 99999 99999 99999 00353 00048 01722 00269 
99999 99999 99999 99999 17910 04050 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01302 00208 00744 00107 
00497 00092 99999 99999 99999 99999 00352 00079 00119 00025 99999 99999 
99999 99999 99999 99999 
079270 059 2006 03 08 22 01 10 +19.70 +98.98   2.27 53.50
99999 99999 99999 99999 99999 99999 99999 99999 00347 00047 01796 00285 
99999 99999 99999 99999 20928 04805 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01403 00218 00762 00110 
00496 00092 99999 99999 99999 99999 00352 00079 00118 00025 99999 99999 
99999 99999 99999 99999 
079387 059 2006 03 08 22 03 07 +19.70 +98.98   2.27 54.05
99999 99999 00861 00076 99999 99999 99999 99999 99999 99999 99999 99999 
00792 00071 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00793 00113 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00390 00057 99999 99999 99999 99999 02317 00505 
00106 00020 01430 00191 
081134 059 2006 03 08 22 32 14 +19.70 +98.98   2.27 60.38
99999 99999 99999 99999 99999 99999 99999 99999 00320 00043 01856 00295 
99999 99999 99999 99999 25134 06182 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01464 00235 00843 00121 
00507 00094 99999 99999 99999 99999 00370 00083 00120 00026 99999 99999 
99999 99999 99999 99999 
081576 059 2006 03 08 22 39 36 +19.70 +98.98   2.27 62.04
99999 99999 99999 99999 99999 99999 99999 99999 00322 00044 01855 00296 
99999 99999 99999 99999 25319 06180 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01522 00264 00853 00122 
00514 00096 99999 99999 99999 99999 00371 00083 00138 00030 99999 99999 
99999 99999 99999 99999 
082208 059 2006 03 08 22 50 08 +19.70 +98.98   2.27 64.42
99999 99999 00865 00076 99999 99999 99999 99999 99999 99999 99999 99999 
00835 00076 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00817 00116 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00382 00055 99999 99999 99999 99999 02463 00536 
00105 00020 01430 00191 
083064 059 2006 03 08 23 04 24 +19.70 +98.98   2.27 67.67
99999 99999 00880 00078 99999 99999 99999 99999 99999 99999 99999 99999 
00770 00069 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00831 00117 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00377 00055 99999 99999 99999 99999 02543 00549 
00105 00020 01430 00191 
083268 059 2006 03 08 23 07 48 +19.70 +98.98   2.27 68.44
99999 99999 99999 99999 99999 99999 99999 99999 00325 00046 01899 00307 
99999 99999 99999 99999 27694 06742 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01336 00193 00848 00121 
00523 00099 99999 99999 99999 99999 00373 00084 00128 00028 99999 99999 
99999 99999 99999 99999 
085192 059 2006 03 08 23 39 52 +19.70 +98.98   2.27 75.83
99999 99999 99999 99999 99999 99999 99999 99999 00333 00047 01886 00306 
99999 99999 99999 99999 29907 07545 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01524 00222 00857 00122 
00550 00106 99999 99999 99999 99999 00390 00088 00128 00028 99999 99999 
99999 99999 99999 99999 
085396 059 2006 03 08 23 43 16 +19.70 +98.98   2.27 76.61
99999 99999 00878 00078 99999 99999 99999 99999 99999 99999 99999 99999 
00747 00066 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00876 00122 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00381 00055 99999 99999 99999 99999 02167 00459 
00107 00020 01431 00191 
085948 059 2006 03 08 23 52 28 +19.70 +98.98   2.27 78.75
99999 99999 99999 99999 99999 99999 99999 99999 00297 00053 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
00515 00097 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 
