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:20060311
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 

080511 070 2006 03 11 22 21 51 +19.70 +98.98   2.27 57.71
99999 99999 99999 99999 99999 99999 99999 99999 00357 00048 01937 00313 
99999 99999 99999 99999 22151 05111 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01331 00200 00770 00111 
00520 00098 99999 99999 99999 99999 00354 00080 00134 00029 99999 99999 
99999 99999 99999 99999 
080693 070 2006 03 11 22 24 53 +19.70 +98.98   2.27 58.44
99999 99999 00851 00075 99999 99999 99999 99999 99999 99999 99999 99999 
00656 00059 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 00363 00052 99999 99999 99999 99999 02295 00496 
00106 00020 99999 99999 
081895 070 2006 03 11 22 44 55 +19.70 +98.98   2.27 62.93
99999 99999 00855 00075 99999 99999 99999 99999 99999 99999 99999 99999 
00618 00055 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00785 00111 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00367 00053 99999 99999 99999 99999 01635 00346 
00115 00022 99999 99999 
082533 070 2006 03 11 22 55 33 +19.70 +98.98   2.27 65.35
99999 99999 99999 99999 99999 99999 99999 99999 00326 00045 01998 00325 
99999 99999 99999 99999 23912 06568 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01467 00232 00846 00121 
00578 00113 99999 99999 99999 99999 00382 00086 00173 00039 99999 99999 
99999 99999 99999 99999 
083303 070 2006 03 11 23 08 23 +19.70 +98.98   2.27 68.29
99999 99999 99999 99999 99999 99999 99999 99999 00340 00045 01953 00318 
99999 99999 99999 99999 24230 06939 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01457 00220 00828 00118 
00549 00105 99999 99999 99999 99999 00354 00079 00146 00032 99999 99999 
99999 99999 99999 99999 
083558 070 2006 03 11 23 12 38 +19.70 +98.98   2.27 69.27
99999 99999 00871 00077 99999 99999 99999 99999 99999 99999 99999 99999 
00631 00056 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00813 00115 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00367 00053 99999 99999 99999 99999 02259 00483 
00114 00022 99999 99999 
084261 070 2006 03 11 23 24 21 +19.70 +98.98   2.27 71.98
99999 99999 99999 99999 99999 99999 99999 99999 00344 00045 01945 00318 
99999 99999 99999 99999 25354 07383 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01522 00227 00807 00115 
00532 00101 99999 99999 99999 99999 00354 00079 00133 00029 99999 99999 
99999 99999 99999 99999 
084938 070 2006 03 11 23 35 38 +19.70 +98.98   2.27 74.59
99999 99999 00866 00077 99999 99999 99999 99999 99999 99999 99999 99999 
00646 00057 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00855 00120 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00370 00053 99999 99999 99999 99999 03271 00712 
00108 00020 99999 99999 
085772 070 2006 03 11 23 49 32 +19.70 +98.98   2.27 77.84
99999 99999 00865 00077 99999 99999 99999 99999 99999 99999 99999 99999 
00639 00056 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00854 00119 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00369 00053 99999 99999 99999 99999 03428 00747 
00124 00024 99999 99999 
085968 070 2006 03 11 23 52 48 +19.70 +98.98   2.27 78.58
99999 99999 99999 99999 99999 99999 99999 99999 00327 00045 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 00825 00118 
99999 99999 99999 99999 99999 99999 00391 00088 00132 00029 99999 99999 
99999 99999 99999 99999 
086141 070 2006 03 11 23 55 41 +19.70 +98.98   2.27 79.26
99999 99999 00854 00076 99999 99999 99999 99999 99999 99999 99999 99999 
00630 00055 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00862 00120 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00370 00053 99999 99999 99999 99999 03496 00762 
00126 00024 99999 99999 
