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:20060319
1 1
2006 03 21   2006 03 21
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 

057154 078 2006 03 19 15 52 34 +19.70 +98.98   2.27 46.57
99999 99999 99999 99999 00410 00044 99999 99999 00298 00037 01447 00218 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 207230 43015 99999 99999 00203 00038 00790 00110 
00537 00102 99999 99999 99999 99999 00335 00075 00129 00028 99999 99999 
99999 99999 99999 99999 
057295 078 2006 03 19 15 54 55 +19.70 +98.98   2.27 46.11
99999 99999 99999 99999 00611 00066 99999 99999 00271 00034 01403 00209 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 194981 40424 99999 99999 99999 99999 00794 00110 
00506 00094 99999 99999 99999 99999 00370 00084 00141 00031 99999 99999 
99999 99999 99999 99999 
057517 078 2006 03 19 15 58 38 +19.70 +98.98   2.27 45.27
99999 99999 00680 00091 99999 99999 00496 00062 99999 99999 99999 99999 
00618 00055 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00978 00145 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00212 00029 99999 99999 99999 99999 01060 00227 
00151 00028 01430 00191 
057876 078 2006 03 19 16 04 36 +19.70 +98.98   2.27 44.00
99999 99999 00690 00092 99999 99999 00507 00063 99999 99999 99999 99999 
00619 00055 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00990 00147 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00188 00026 99999 99999 99999 99999 99999 99999 
00160 00031 01430 00191 
059621 078 2006 03 19 16 33 41 +19.70 +98.98   2.27 37.81
99999 99999 99999 99999 00223 00018 99999 99999 00283 00035 01481 00220 
99999 99999 99999 99999 21306 03319 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 176230 36055 99999 99999 01292 00195 00756 00104 
00547 00105 99999 99999 99999 99999 00323 00072 00142 00031 99999 99999 
99999 99999 99999 99999 
059865 078 2006 03 19 16 37 45 +19.70 +98.98   2.27 36.97
99999 99999 00690 00090 99999 99999 00497 00061 99999 99999 99999 99999 
00683 00061 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00913 00137 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00199 00027 99999 99999 99999 99999 99999 99999 
00152 00029 01430 00191 
061268 078 2006 03 19 17 01 08 +19.70 +98.98   2.27 32.31
99999 99999 99999 99999 00209 00017 99999 99999 00311 00039 01363 00198 
99999 99999 99999 99999 20787 03075 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 174730 36075 99999 99999 01291 00206 00748 00101 
00442 00077 99999 99999 99999 99999 00329 00073 00132 00029 99999 99999 
99999 99999 99999 99999 
061474 078 2006 03 19 17 04 34 +19.70 +98.98   2.27 31.66
99999 99999 00693 00090 99999 99999 00500 00062 99999 99999 99999 99999 
00738 00066 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00888 00130 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00278 00039 99999 99999 99999 99999 99999 99999 
00097 00017 01430 00191 
063375 078 2006 03 19 17 36 16 +19.70 +98.98   2.27 26.13
99999 99999 99999 99999 00201 00017 99999 99999 00305 00038 01477 00218 
99999 99999 99999 99999 21597 03413 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 180440 36928 99999 99999 01323 00211 00804 00112 
00508 00095 99999 99999 99999 99999 00324 00072 00130 00028 99999 99999 
99999 99999 99999 99999 
072303 078 2006 03 19 20 05 03 +19.70 +98.98   2.27 28.18
99999 99999 00699 00093 99999 99999 00507 00063 99999 99999 99999 99999 
00790 00071 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 01132 00163 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00606 00090 99999 99999 99999 99999 01937 00439 
00060 00010 01431 00191 
072513 078 2006 03 19 20 08 33 +19.70 +98.98   2.27 28.79
99999 99999 99999 99999 00202 00017 99999 99999 00300 00037 01452 00213 
99999 99999 99999 99999 17709 02604 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 152480 31073 99999 99999 01419 00243 00695 00091 
00535 00102 99999 99999 99999 99999 00293 00064 00130 00028 99999 99999 
99999 99999 99999 99999 
074239 078 2006 03 19 20 37 19 +19.70 +98.98   2.27 34.19
99999 99999 00699 00092 99999 99999 00498 00062 99999 99999 99999 99999 
00774 00069 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 01110 00161 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00618 00092 99999 99999 99999 99999 02372 00543 
00125 00023 01430 00191 
074449 078 2006 03 19 20 40 49 +19.70 +98.98   2.27 34.88
99999 99999 99999 99999 00226 00018 99999 99999 00303 00038 01638 00251 
99999 99999 99999 99999 26533 05164 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 229870 47168 99999 99999 01431 00214 00820 00113 
00552 00106 99999 99999 99999 99999 00339 00076 00122 00026 99999 99999 
99999 99999 99999 99999 
075796 078 2006 03 19 21 03 16 +19.70 +98.98   2.27 39.50
99999 99999 00698 00089 99999 99999 00498 00062 99999 99999 99999 99999 
00753 00067 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 01100 00160 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00656 00099 99999 99999 99999 99999 02248 00512 
00111 00020 01430 00191 
075999 078 2006 03 19 21 06 39 +19.70 +98.98   2.27 40.22
99999 99999 99999 99999 00230 00019 99999 99999 00291 00036 01572 00238 
99999 99999 99999 99999 22690 04311 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 193260 39136 99999 99999 01338 00212 00793 00108 
00537 00102 99999 99999 99999 99999 00322 00071 00136 00030 99999 99999 
99999 99999 99999 99999 
077910 078 2006 03 19 21 38 30 +19.70 +98.98   2.27 47.20
99999 99999 00734 00090 99999 99999 00480 00059 99999 99999 99999 99999 
00593 00052 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00966 00134 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00387 00055 99999 99999 99999 99999 01376 00299 
00061 00010 01430 00191 
078200 078 2006 03 19 21 43 20 +19.70 +98.98   2.27 48.20
99999 99999 99999 99999 00201 00019 99999 99999 00303 00038 01532 00232 
99999 99999 99999 99999 20303 03111 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 174280 35301 99999 99999 01310 00214 00794 00108 
00548 00105 99999 99999 99999 99999 00313 00069 00147 00032 99999 99999 
99999 99999 99999 99999 
079394 078 2006 03 19 22 03 14 +19.70 +98.98   2.27 52.66
99999 99999 99999 99999 00222 00018 99999 99999 00292 00036 01539 00234 
99999 99999 99999 99999 21775 03948 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 183250 37165 99999 99999 01309 00206 00801 00109 
00560 00108 99999 99999 99999 99999 00308 00068 00143 00031 99999 99999 
99999 99999 99999 99999 
079607 078 2006 03 19 22 06 47 +19.70 +98.98   2.27 53.46
99999 99999 00788 00090 99999 99999 00507 00063 99999 99999 99999 99999 
00746 00067 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 01096 00156 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00606 00090 99999 99999 99999 99999 01979 00447 
00097 00017 01430 00191 
081219 078 2006 03 19 22 33 39 +19.70 +98.98   2.27 59.59
99999 99999 00795 00085 99999 99999 00494 00062 99999 99999 99999 99999 
00690 00061 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 01019 00144 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00461 00067 99999 99999 99999 99999 02246 00505 
00116 00022 01430 00191 
081401 078 2006 03 19 22 36 41 +19.70 +98.98   2.27 60.29
99999 99999 99999 99999 00210 00017 99999 99999 00312 00039 01739 00276 
99999 99999 99999 99999 29274 06039 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 254510 52972 99999 99999 01485 00225 00817 00113 
00565 00109 99999 99999 99999 99999 00349 00078 00120 00026 99999 99999 
99999 99999 99999 99999 
084064 078 2006 03 19 23 21 04 +19.70 +98.98   2.27 69.98
99999 99999 99999 99999 00222 00018 99999 99999 00317 00040 01806 00291 
99999 99999 99999 99999 29724 06383 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 253260 52881 99999 99999 01553 00232 00815 00113 
00577 00112 99999 99999 99999 99999 00352 00079 00121 00026 99999 99999 
99999 99999 99999 99999 
084843 078 2006 03 19 23 34 03 +19.70 +98.98   2.27 73.01
99999 99999 00809 00076 99999 99999 00508 00065 99999 99999 99999 99999 
00657 00057 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 01009 00141 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00444 00065 99999 99999 99999 99999 02362 00528 
00127 00023 01430 00191 
085272 078 2006 03 19 23 41 12 +19.70 +98.98   2.27 75.28
99999 99999 99999 99999 00220 00018 99999 99999 00309 00039 01726 00277 
99999 99999 99999 99999 31719 06804 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 263250 55423 99999 99999 01467 00218 00801 00111 
00560 00108 99999 99999 99999 99999 00358 00080 00122 00026 99999 99999 
99999 99999 99999 99999 
085648 078 2006 03 19 23 47 28 +19.70 +98.98   2.27 76.75
99999 99999 00786 00071 99999 99999 00495 00064 99999 99999 99999 99999 
00624 00054 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00982 00135 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00421 00061 99999 99999 99999 99999 02380 00531 
00135 00025 01431 00191 
087018 078 2006 03 19 24 10 19 +19.70 +98.98   2.27 82.11
99999 99999 99999 99999 00222 00018 99999 99999 00308 00039 01700 00273 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 271250 57931 99999 99999 99999 99999 00780 00108 
00570 00110 99999 99999 99999 99999 00372 00083 00133 00029 99999 99999 
99999 99999 99999 99999 
087200 078 2006 03 19 24 13 20 +19.70 +98.98   2.27 82.82
99999 99999 00759 00067 99999 99999 00497 00067 99999 99999 99999 99999 
00629 00055 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00929 00126 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00458 00067 99999 99999 99999 99999 02224 00488 
00154 00029 01431 00191 
087783 078 2006 03 19 24 23 04 +19.70 +98.98   2.27 84.50
99999 99999 99999 99999 00225 00018 99999 99999 00320 00040 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 
00568 00110 99999 99999 99999 99999 99999 99999 00135 00029 99999 99999 
99999 99999 99999 99999 
088224 078 2006 03 19 24 30 24 +19.70 +98.98   2.27 86.72
99999 99999 00742 00065 99999 99999 00496 00072 99999 99999 99999 99999 
00626 00054 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00871 00115 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00524 00078 99999 99999 99999 99999 01794 00381 
00163 00031 01433 00192 
