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:20060310
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 

057223 069 2006 03 10 15 53 43 +19.70 +98.98   2.27 48.68
99999 99999 99999 99999 99999 99999 99999 99999 00336 00043 01995 00323 
99999 99999 99999 99999 16162 04137 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01334 00220 00746 00107 
00483 00088 99999 99999 99999 99999 00356 00080 00135 00029 99999 99999 
99999 99999 99999 99999 
057425 069 2006 03 10 15 57 05 +19.70 +98.98   2.27 47.96
99999 99999 00828 00073 99999 99999 99999 99999 99999 99999 99999 99999 
00794 00072 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00799 00114 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00432 00064 99999 99999 99999 99999 02478 00545 
00123 00023 99999 99999 
057895 069 2006 03 10 16 04 55 +19.70 +98.98   2.27 46.30
99999 99999 99999 99999 99999 99999 99999 99999 00334 00043 01992 00322 
99999 99999 99999 99999 16518 04132 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01081 00182 00745 00107 
00486 00089 99999 99999 99999 99999 00362 00081 00131 00028 99999 99999 
99999 99999 99999 99999 
059489 069 2006 03 10 16 31 29 +19.70 +98.98   2.27 40.82
99999 99999 99999 99999 99999 99999 99999 99999 00336 00043 02259 00375 
99999 99999 99999 99999 16335 03457 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01267 00212 00734 00106 
00490 00090 99999 99999 99999 99999 00361 00081 00134 00029 99999 99999 
99999 99999 99999 99999 
061669 069 2006 03 10 17 07 49 +19.70 +98.98   2.27 33.94
99999 99999 99999 99999 99999 99999 99999 99999 00383 00054 02367 00396 
99999 99999 99999 99999 17524 04290 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01446 00236 00765 00110 
00518 00097 99999 99999 99999 99999 00347 00078 00143 00032 99999 99999 
99999 99999 99999 99999 
062924 069 2006 03 10 17 28 44 +19.70 +98.98   2.27 30.47
99999 99999 99999 99999 99999 99999 99999 99999 00336 00043 02045 00329 
99999 99999 99999 99999 16721 04588 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 01311 00213 00751 00108 
00495 00092 99999 99999 99999 99999 00347 00078 00129 00028 99999 99999 
99999 99999 99999 99999 
063084 069 2006 03 10 17 31 24 +19.70 +98.98   2.27 29.99
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
00784 00071 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00760 00109 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00355 00051 99999 99999 99999 99999 01280 00272 
00133 00026 99999 99999 
085622 069 2006 03 10 23 47 02 +19.70 +98.98   2.27 77.32
99999 99999 00835 00074 99999 99999 99999 99999 99999 99999 99999 99999 
00535 00048 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00871 00122 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00371 00054 99999 99999 99999 99999 03612 00791 
00123 00023 99999 99999 
085853 069 2006 03 10 23 50 53 +19.70 +98.98   2.27 78.21
99999 99999 99999 99999 99999 99999 99999 99999 00283 00050 99999 99999 
99999 99999 99999 99999 37800 08196 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 00758 00111 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 
