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:20060304
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 

074370 063 2006 03 04 20 39 30 +19.70 +98.98   2.27 37.72
99999 99999 99999 99999 99999 99999 99999 99999 00321 00041 02017 00322 
99999 99999 99999 99999 24630 06001 99999 99999 99999 99999 99999 99999 
00430 00045 99999 99999 99999 99999 99999 99999 01644 00245 00870 00124 
00508 00095 99999 99999 99999 99999 00333 00074 00142 00031 99999 99999 
99999 99999 99999 99999 
074568 063 2006 03 04 20 42 48 +19.70 +98.98   2.27 38.30
99999 99999 99999 99999 99999 99999 99999 99999 00324 00041 02012 00321 
99999 99999 99999 99999 24520 05890 99999 99999 99999 99999 99999 99999 
00429 00045 99999 99999 99999 99999 99999 99999 01639 00246 00871 00124 
00508 00095 99999 99999 99999 99999 00333 00074 00142 00031 99999 99999 
99999 99999 99999 99999 
075044 063 2006 03 04 20 50 44 +19.70 +98.98   2.27 39.75
99999 99999 00872 00078 99999 99999 99999 99999 99999 99999 99999 99999 
00869 00079 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00753 00107 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00364 00053 99999 99999 99999 99999 03596 00807 
00108 00020 01430 00191 
075359 063 2006 03 04 20 55 59 +19.70 +98.98   2.27 40.74
99999 99999 00872 00078 99999 99999 99999 99999 99999 99999 99999 99999 
00923 00085 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00752 00107 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00363 00052 99999 99999 99999 99999 03681 00828 
00110 00021 01430 00191 
075969 063 2006 03 04 21 06 09 +19.70 +98.98   2.27 42.71
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 01947 00312 
99999 99999 99999 99999 23451 04887 99999 99999 99999 99999 99999 99999 
00422 00044 99999 99999 99999 99999 99999 99999 01602 00275 00719 00103 
00483 00088 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 
076866 063 2006 03 04 21 21 06 +19.70 +98.98   2.27 45.67
99999 99999 99999 99999 99999 99999 99999 99999 00352 00047 02004 00321 
99999 99999 99999 99999 24151 06227 99999 99999 99999 99999 99999 99999 
00429 00045 99999 99999 99999 99999 99999 99999 01604 00239 00881 00125 
00537 00102 99999 99999 99999 99999 00334 00074 00158 00035 99999 99999 
99999 99999 99999 99999 
077432 063 2006 03 04 21 30 32 +19.70 +98.98   2.27 47.59
99999 99999 00863 00077 99999 99999 99999 99999 99999 99999 99999 99999 
00842 00076 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00753 00107 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00368 00053 99999 99999 99999 99999 02487 00541 
00107 00020 01430 00191 
079605 063 2006 03 04 22 06 45 +19.70 +98.98   2.27 55.27
99999 99999 00867 00077 99999 99999 99999 99999 99999 99999 99999 99999 
00811 00073 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00772 00109 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00372 00054 99999 99999 99999 99999 01859 00398 
00109 00021 01430 00191 
079970 063 2006 03 04 22 12 50 +19.70 +98.98   2.27 56.59
99999 99999 99999 99999 99999 99999 99999 99999 00315 00040 02021 00326 
99999 99999 99999 99999 24034 07546 99999 99999 99999 99999 99999 99999 
00430 00045 99999 99999 99999 99999 99999 99999 01684 00257 00919 00130 
00556 00107 99999 99999 99999 99999 00339 00075 00241 00054 99999 99999 
99999 99999 99999 99999 
081960 063 2006 03 04 22 46 00 +19.70 +98.98   2.27 63.93
99999 99999 00878 00078 99999 99999 99999 99999 99999 99999 99999 99999 
00783 00070 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00811 00115 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00376 00054 99999 99999 99999 99999 03506 00774 
00112 00021 01430 00191 
083266 063 2006 03 04 23 07 46 +19.70 +98.98   2.27 68.95
99999 99999 99999 99999 99999 99999 99999 99999 00335 00044 02142 00356 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
00431 00045 99999 99999 99999 99999 99999 99999 01471 00228 00894 00126 
00564 00109 99999 99999 99999 99999 00355 00080 00130 00028 99999 99999 
99999 99999 99999 99999 
086217 063 2006 03 04 23 56 57 +19.70 +98.98   2.27 80.13
99999 99999 99999 99999 99999 99999 99999 99999 00312 00042 01987 00329 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
00434 00045 99999 99999 99999 99999 99999 99999 99999 99999 00848 00121 
00543 00104 99999 99999 99999 99999 99999 99999 00122 00026 99999 99999 
99999 99999 99999 99999 
086402 063 2006 03 04 24 00 02 +19.70 +98.98   2.27 80.85
99999 99999 00867 00077 99999 99999 99999 99999 99999 99999 99999 99999 
00646 00056 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00869 00121 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00369 00053 99999 99999 99999 99999 03062 00657 
00111 00021 01430 00191 
086580 063 2006 03 04 24 03 00 +19.70 +98.98   2.27 81.62
99999 99999 99999 99999 99999 99999 99999 99999 00277 00044 02046 00342 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
00437 00046 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
00543 00104 99999 99999 99999 99999 99999 99999 00120 00026 99999 99999 
99999 99999 99999 99999 
086768 063 2006 03 04 24 06 08 +19.70 +98.98   2.27 82.35
99999 99999 00878 00078 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00871 00120 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00369 00053 99999 99999 99999 99999 03107 00666 
00111 00021 01430 00191 
086951 063 2006 03 04 24 09 11 +19.70 +98.98   2.27 83.10
99999 99999 99999 99999 99999 99999 99999 99999 00272 00042 02098 00353 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
00437 00046 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
00558 00108 99999 99999 99999 99999 99999 99999 00123 00026 99999 99999 
99999 99999 99999 99999 
087155 063 2006 03 04 24 12 35 +19.70 +98.98   2.27 83.85
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00001 00001 99999 99999 99999 99999 99999 99999 
00438 00046 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
00547 00105 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 
