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:20060316
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 

056060 075 2006 03 16 15 34 20 +19.70 +98.98   2.27 51.43
99999 99999 99999 99999 99999 99999 99999 99999 00317 00040 01754 00279 
99999 99999 99999 99999 34058 07252 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 259220 54317 99999 99999 01529 00241 00809 00113 
00518 00097 99999 99999 99999 99999 00358 00081 00114 00024 99999 99999 
99999 99999 99999 99999 
056249 075 2006 03 16 15 37 29 +19.70 +98.98   2.27 50.73
99999 99999 00761 00084 99999 99999 00500 00063 99999 99999 99999 99999 
00574 00051 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00948 00137 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00386 00056 99999 99999 99999 99999 01811 00403 
00128 00024 99999 99999 
056463 075 2006 03 16 15 41 03 +19.70 +98.98   2.27 49.94
99999 99999 99999 99999 99999 99999 99999 99999 00314 00040 01708 00269 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 254850 53323 99999 99999 01350 00213 00799 00111 
00521 00098 99999 99999 99999 99999 00363 00082 00113 00024 99999 99999 
99999 99999 99999 99999 
056668 075 2006 03 16 15 44 28 +19.70 +98.98   2.27 49.18
99999 99999 00752 00083 99999 99999 00498 00062 99999 99999 99999 99999 
00568 00051 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00939 00135 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00387 00056 99999 99999 99999 99999 01714 00382 
00130 00025 99999 99999 
057624 075 2006 03 16 16 00 24 +19.70 +98.98   2.27 45.69
99999 99999 99999 99999 99999 99999 99999 99999 00311 00039 01624 00252 
99999 99999 99999 99999 32050 06802 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 249410 52022 99999 99999 01652 00261 00814 00114 
00525 00099 99999 99999 99999 99999 00355 00080 00114 00024 99999 99999 
99999 99999 99999 99999 
057842 075 2006 03 16 16 04 02 +19.70 +98.98   2.27 44.91
99999 99999 00699 00085 99999 99999 00495 00062 99999 99999 99999 99999 
00649 00058 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00919 00133 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00328 00047 99999 99999 99999 99999 01412 00307 
00152 00029 99999 99999 
058559 075 2006 03 16 16 15 59 +19.70 +98.98   2.27 42.35
99999 99999 99999 99999 99999 99999 99999 99999 00295 00036 01605 00248 
99999 99999 99999 99999 30159 06266 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 242650 50457 99999 99999 01466 00224 00821 00115 
00542 00103 99999 99999 99999 99999 00352 00079 00114 00024 99999 99999 
99999 99999 99999 99999 
058721 075 2006 03 16 16 18 41 +19.70 +98.98   2.27 41.78
99999 99999 99999 99999 99999 99999 99999 99999 00295 00037 01639 00254 
99999 99999 99999 99999 30319 06259 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 249180 51937 99999 99999 01522 00234 00819 00115 
00547 00105 99999 99999 99999 99999 00353 00079 00113 00024 99999 99999 
99999 99999 99999 99999 
059309 075 2006 03 16 16 28 29 +19.70 +98.98   2.27 39.73
99999 99999 00678 00087 99999 99999 00496 00061 99999 99999 99999 99999 
00684 00061 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00844 00122 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00264 00037 99999 99999 99999 99999 99999 99999 
00124 00024 99999 99999 
061369 075 2006 03 16 17 02 49 +19.70 +98.98   2.27 32.93
99999 99999 99999 99999 99999 99999 99999 99999 00313 00040 01611 00246 
99999 99999 99999 99999 28031 05515 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 232510 48177 99999 99999 01676 00256 00773 00108 
00460 00082 99999 99999 99999 99999 00347 00078 00116 00025 99999 99999 
99999 99999 99999 99999 
061548 075 2006 03 16 17 05 49 +19.70 +98.98   2.27 32.37
99999 99999 00685 00088 99999 99999 00500 00062 99999 99999 99999 99999 
00727 00065 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00810 00115 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00272 00038 99999 99999 99999 99999 99999 99999 
00135 00025 99999 99999 
062707 075 2006 03 16 17 25 07 +19.70 +98.98   2.27 28.96
99999 99999 00689 00089 99999 99999 00502 00062 99999 99999 99999 99999 
00712 00064 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00857 00121 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00312 00044 99999 99999 99999 99999 99999 99999 
00115 00021 99999 99999 
062890 075 2006 03 16 17 28 10 +19.70 +98.98   2.27 28.47
99999 99999 99999 99999 99999 99999 99999 99999 00302 00038 01581 00239 
99999 99999 99999 99999 25490 04628 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 214080 44043 99999 99999 01581 00240 00679 00094 
00557 00107 99999 99999 99999 99999 00341 00076 00121 00026 99999 99999 
99999 99999 99999 99999 
063386 075 2006 03 16 17 36 26 +19.70 +98.98   2.27 27.18
99999 99999 99999 99999 99999 99999 99999 99999 00290 00036 01717 00267 
99999 99999 99999 99999 29757 06074 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 248930 51761 99999 99999 01639 00249 00677 00094 
00571 00111 99999 99999 99999 99999 00349 00078 00114 00024 99999 99999 
99999 99999 99999 99999 
063568 075 2006 03 16 17 39 28 +19.70 +98.98   2.27 26.69
99999 99999 00689 00089 99999 99999 00499 00062 99999 99999 99999 99999 
00842 00076 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00852 00119 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00347 00049 99999 99999 99999 99999 01088 00235 
00070 00012 99999 99999 
074605 075 2006 03 16 20 43 25 +19.70 +98.98   2.27 35.95
99999 99999 00708 00091 99999 99999 00480 00061 99999 99999 99999 99999 
00835 00076 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00856 00123 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 00411 00060 99999 99999 99999 99999 02225 00507 
00114 00021 99999 99999 
074818 075 2006 03 16 20 46 58 +19.70 +98.98   2.27 36.65
99999 99999 99999 99999 99999 99999 99999 99999 00307 00039 02015 00329 
99999 99999 99999 99999 42467 09394 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 371870 81708 99999 99999 99999 99999 00809 00114 
00571 00111 99999 99999 99999 99999 00357 00080 00110 00023 99999 99999 
99999 99999 99999 99999 
