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:20060328
1 1
2006 03 31   2006 03 31
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 

055768 087 2006 03 28 15 29 28 +19.70 +98.98   2.27 49.71
99999 99999 99999 99999 99999 99999 99999 99999 00318 00041 01984 00324 
99999 99999 99999 99999 51985 11863 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 397400 89582 99999 99999 01640 00260 00799 00113 
00461 00082 99999 99999 99999 99999 00359 00081 00109 00023 99999 99999 
99999 99999 99999 99999 
055951 087 2006 03 28 15 32 31 +19.70 +98.98   2.27 49.01
99999 99999 00781 00084 99999 99999 00492 00062 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 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 02528 00584 
00111 00021 01430 00191 
058111 087 2006 03 28 16 08 31 +19.70 +98.98   2.27 40.87
99999 99999 00734 00083 99999 99999 00487 00061 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00802 00114 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 02254 00512 
00134 00026 01430 00191 
058288 087 2006 03 28 16 11 28 +19.70 +98.98   2.27 40.21
99999 99999 99999 99999 99999 99999 99999 99999 00327 00042 02038 00334 
99999 99999 99999 99999 52237 11962 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 399960 89860 99999 99999 01525 00240 00776 00110 
00482 00088 99999 99999 99999 99999 00359 00081 00109 00023 99999 99999 
99999 99999 99999 99999 
059954 087 2006 03 28 16 39 15 +19.70 +98.98   2.27 34.16
99999 99999 99999 99999 99999 99999 99999 99999 00296 00037 02039 00334 
99999 99999 99999 99999 50805 11603 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 395430 88387 99999 99999 01516 00238 00813 00115 
00502 00093 99999 99999 99999 99999 00359 00081 00109 00023 99999 99999 
99999 99999 99999 99999 
060172 087 2006 03 28 16 42 52 +19.70 +98.98   2.27 33.39
99999 99999 00709 00084 99999 99999 00484 00061 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00769 00110 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 02286 00517 
00137 00026 01430 00191 
060889 087 2006 03 28 16 54 49 +19.70 +98.98   2.27 31.43
99999 99999 00704 00084 99999 99999 00476 00060 99999 99999 99999 99999 
99999 99999 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 99999 99999 99999 99999 99999 99999 02729 00642 
00142 00027 01430 00191 
061918 087 2006 03 28 17 11 58 +19.70 +98.98   2.27 27.96
99999 99999 99999 99999 99999 99999 99999 99999 00313 00040 02091 00343 
99999 99999 99999 99999 50599 11543 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 398170 89011 99999 99999 01663 00264 00829 00118 
00476 00086 99999 99999 99999 99999 00359 00081 00109 00023 99999 99999 
99999 99999 99999 99999 
073839 087 2006 03 28 20 30 39 +19.70 +98.98   2.27 31.32
99999 99999 99999 99999 99999 99999 99999 99999 00305 00038 02036 00332 
99999 99999 99999 99999 48180 10874 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 393211 87596 99999 99999 01573 00247 00753 00106 
00520 00098 99999 99999 99999 99999 00358 00081 00109 00023 99999 99999 
99999 99999 99999 99999 
074520 087 2006 03 28 20 42 00 +19.70 +98.98   2.27 33.77
99999 99999 00711 00084 99999 99999 00482 00061 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00814 00116 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 02260 00511 
00119 00022 01430 00191 
076237 087 2006 03 28 21 10 37 +19.70 +98.98   2.27 39.93
99999 99999 00733 00083 99999 99999 00478 00061 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00813 00116 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 02821 00668 
00114 00021 01430 00191 
076855 087 2006 03 28 21 20 55 +19.70 +98.98   2.27 42.14
99999 99999 99999 99999 99999 99999 99999 99999 00298 00037 01983 00323 
99999 99999 99999 99999 47143 10567 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 388890 86669 99999 99999 01586 00249 00790 00111 
00494 00091 99999 99999 99999 99999 00359 00081 00110 00023 99999 99999 
99999 99999 99999 99999 
080249 087 2006 03 28 22 17 29 +19.70 +98.98   2.27 55.13
99999 99999 99999 99999 99999 99999 99999 99999 00310 00039 02141 00358 
99999 99999 99999 99999 54257 12400 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 414990 95228 99999 99999 01467 00230 00802 00113 
00523 00098 99999 99999 99999 99999 00361 00081 00110 00023 99999 99999 
99999 99999 99999 99999 
080431 087 2006 03 28 22 20 31 +19.70 +98.98   2.27 55.85
99999 99999 00798 00082 99999 99999 00479 00061 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 00832 00119 99999 99999 99999 99999 99999 99999 99999 99999 
99999 99999 99999 99999 99999 99999 99999 99999 99999 99999 03145 00777 
00122 00023 01430 00191 
