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:20060307
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 

057073 066 2006 03 07 15 51 13 +19.70 +98.98   2.27 49.98
99999 99999 99999 99999 99999 99999 99999 99999 00325 00042 01825 00287 
99999 99999 99999 99999 19956 04934 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01402 00222 00798 00115 
00486 00089 99999 99999 99999 99999 00352 00079 00129 00028 99999 99999 
99999 99999 99999 99999 
057429 066 2006 03 07 15 57 10 +19.70 +98.98   2.27 48.72
99999 99999 00848 00075 99999 99999 99999 99999 99999 99999 99999 99999 
00838 00076 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00794 00113 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00410 00060 99999 99999 99999 99999 01633 00356 
00104 00020 01430 00191 
057821 066 2006 03 07 16 03 41 +19.70 +98.98   2.27 47.35
99999 99999 99999 99999 99999 99999 99999 99999 00322 00041 01778 00278 
99999 99999 99999 99999 20756 06746 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01834 00299 00782 00112 
00473 00086 99999 99999 99999 99999 00365 00082 00115 00024 99999 99999 
99999 99999 99999 99999 
059476 066 2006 03 07 16 31 16 +19.70 +98.98   2.27 41.73
99999 99999 00824 00072 99999 99999 99999 99999 99999 99999 99999 99999 
00877 00080 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 00414 00061 99999 99999 99999 99999 01655 00361 
00109 00021 01430 00191 
059995 066 2006 03 07 16 39 55 +19.70 +98.98   2.27 40.04
99999 99999 00711 00060 99999 99999 99999 99999 99999 99999 99999 99999 
00883 00081 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00786 00112 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00410 00060 99999 99999 99999 99999 01678 00367 
00110 00021 01430 00191 
060202 066 2006 03 07 16 43 23 +19.70 +98.98   2.27 39.37
99999 99999 99999 99999 99999 99999 99999 99999 00312 00041 01695 00262 
99999 99999 99999 99999 18653 03984 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01425 00229 00714 00102 
00472 00085 99999 99999 99999 99999 00352 00079 00116 00025 99999 99999 
99999 99999 99999 99999 
062732 066 2006 03 07 17 25 32 +19.70 +98.98   2.27 32.00
99999 99999 00831 00073 99999 99999 99999 99999 99999 99999 99999 99999 
00817 00074 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00777 00111 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00352 00051 99999 99999 99999 99999 01942 00424 
00117 00022 01430 00191 
063116 066 2006 03 07 17 31 56 +19.70 +98.98   2.27 31.03
99999 99999 00693 00059 99999 99999 99999 99999 99999 99999 99999 99999 
00832 00076 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00775 00111 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00369 00053 99999 99999 99999 99999 01848 00401 
00112 00021 01430 00191 
063381 066 2006 03 07 17 36 21 +19.70 +98.98   2.27 30.39
99999 99999 99999 99999 99999 99999 99999 99999 00280 00035 01499 00229 
99999 99999 99999 99999 11739 02600 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01429 00236 00713 00103 
00490 00090 99999 99999 99999 99999 00351 00079 00113 00024 99999 99999 
99999 99999 99999 99999 
071379 066 2006 03 07 19 49 39 +19.70 +98.98   2.27 29.11
99999 99999 99999 99999 99999 99999 99999 99999 00355 00047 01685 00258 
99999 99999 99999 99999 10430 03497 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01430 00238 00756 00109 
00498 00092 99999 99999 99999 99999 00349 00078 00113 00024 99999 99999 
99999 99999 99999 99999 
071677 066 2006 03 07 19 54 37 +19.70 +98.98   2.27 29.77
99999 99999 00828 00073 99999 99999 99999 99999 99999 99999 99999 99999 
00752 00067 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00694 00100 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00388 00056 99999 99999 99999 99999 01108 00233 
00108 00020 01430 00191 
072261 066 2006 03 07 20 04 21 +19.70 +98.98   2.27 30.78
99999 99999 00703 00060 99999 99999 99999 99999 99999 99999 99999 99999 
00713 00063 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00736 00104 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00448 00065 99999 99999 99999 99999 00952 00201 
00092 00017 01430 00191 
073170 066 2006 03 07 20 19 30 +19.70 +98.98   2.27 33.12
99999 99999 99999 99999 99999 99999 99999 99999 00317 00041 01537 00231 
99999 99999 99999 99999 08482 03048 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01466 00245 00730 00105 
00476 00086 99999 99999 99999 99999 00351 00079 00110 00023 99999 99999 
99999 99999 99999 99999 
073629 066 2006 03 07 20 27 09 +19.70 +98.98   2.27 34.84
99999 99999 99999 99999 99999 99999 99999 99999 00323 00041 01525 00229 
99999 99999 99999 99999 08393 03019 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01495 00251 00736 00106 
00474 00086 99999 99999 99999 99999 00352 00079 00112 00024 99999 99999 
99999 99999 99999 99999 
073932 066 2006 03 07 20 32 12 +19.70 +98.98   2.27 35.72
99999 99999 00697 00059 99999 99999 99999 99999 99999 99999 99999 99999 
00778 00070 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00751 00106 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00522 00077 99999 99999 99999 99999 01303 00280 
00093 00017 01430 00191 
076950 066 2006 03 07 21 22 30 +19.70 +98.98   2.27 45.43
99999 99999 99999 99999 99999 99999 99999 99999 00366 00049 01491 00224 
99999 99999 99999 99999 08050 02704 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01367 00228 00749 00108 
00497 00092 99999 99999 99999 99999 00350 00078 00109 00023 99999 99999 
99999 99999 99999 99999 
077959 066 2006 03 07 21 39 19 +19.70 +98.98   2.27 48.94
99999 99999 99999 99999 99999 99999 99999 99999 00367 00049 01491 00224 
99999 99999 99999 99999 08444 02684 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01377 00231 00756 00109 
00496 00092 99999 99999 99999 99999 00347 00078 00110 00023 99999 99999 
99999 99999 99999 99999 
079652 066 2006 03 07 22 07 32 +19.70 +98.98   2.27 55.03
99999 99999 00861 00076 99999 99999 99999 99999 99999 99999 99999 99999 
00729 00065 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00796 00113 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00660 00099 99999 99999 99999 99999 01895 00411 
00101 00019 01430 00191 
081440 066 2006 03 07 22 37 20 +19.70 +98.98   2.27 61.64
99999 99999 00863 00076 99999 99999 99999 99999 99999 99999 99999 99999 
00657 00058 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00802 00113 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00702 00105 99999 99999 99999 99999 01884 00404 
00098 00018 01430 00191 
081692 066 2006 03 07 22 41 32 +19.70 +98.98   2.27 62.59
99999 99999 99999 99999 99999 99999 99999 99999 00346 00044 01577 00242 
99999 99999 99999 99999 10498 02755 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01420 00237 00781 00112 
00487 00089 99999 99999 99999 99999 00343 00077 00112 00024 99999 99999 
99999 99999 99999 99999 
083283 066 2006 03 07 23 08 03 +19.70 +98.98   2.27 68.59
99999 99999 00837 00074 99999 99999 99999 99999 99999 99999 99999 99999 
00629 00055 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00808 00114 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00392 00057 99999 99999 99999 99999 01350 00281 
00108 00020 01430 00191 
084505 066 2006 03 07 23 28 25 +19.70 +98.98   2.27 73.27
99999 99999 99999 99999 99999 99999 99999 99999 00351 00045 01485 00228 
99999 99999 99999 99999 12394 03084 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01337 00224 00803 00115 
00493 00091 99999 99999 99999 99999 00338 00075 00113 00024 99999 99999 
99999 99999 99999 99999 
085437 066 2006 03 07 23 43 57 +19.70 +98.98   2.27 76.86
99999 99999 99999 99999 99999 99999 99999 99999 00341 00044 01473 00227 
99999 99999 99999 99999 12690 03097 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01264 00209 00779 00111 
00480 00087 99999 99999 99999 99999 00345 00077 00114 00024 99999 99999 
99999 99999 99999 99999 
085656 066 2006 03 07 23 47 36 +19.70 +98.98   2.27 77.76
99999 99999 00842 00074 99999 99999 99999 99999 99999 99999 99999 99999 
00594 00052 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00872 00122 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00363 00052 99999 99999 99999 99999 01320 00271 
00107 00020 01430 00191 
086278 066 2006 03 07 23 57 58 +19.70 +98.98   2.27 80.13
99999 99999 00848 00075 99999 99999 99999 99999 99999 99999 99999 99999 
00591 00052 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00889 00124 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00346 00049 99999 99999 99999 99999 01258 00256 
00106 00020 01431 00191 
087083 066 2006 03 07 24 11 23 +19.70 +98.98   2.27 83.31
99999 99999 99999 99999 99999 99999 99999 99999 00341 00044 99999 99999 
99999 99999 99999 99999 12692 03368 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 00774 00111 
00488 00090 99999 99999 99999 99999 00342 00075 00114 00024 99999 99999 
99999 99999 99999 99999 
087282 066 2006 03 07 24 14 42 +19.70 +98.98   2.27 84.11
99999 99999 00835 00074 99999 99999 99999 99999 99999 99999 99999 99999 
00601 00053 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00898 00123 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00178 00024 99999 99999 99999 99999 00601 00053 
00107 00020 01431 00191 
087908 066 2006 03 07 24 25 08 +19.70 +98.98   2.27 86.52
99999 99999 99999 99999 99999 99999 99999 99999 00305 00041 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 00777 00111 
99999 99999 99999 99999 99999 99999 99999 99999 00114 00024 99999 99999 
99999 99999 99999 99999 
088266 066 2006 03 07 24 31 06 +19.70 +98.98   2.27 87.92
99999 99999 00829 00074 99999 99999 99999 99999 99999 99999 99999 99999 
00589 00052 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 00084 00012 99999 99999 99999 99999 00965 00191 
00105 00020 01431 00191 
