Version 1.1
This is the version archived in the ACE-2 archive, there called version 1

Changes from version 1.0 are:
Some changes in cal. constants Vo. See individual flights. Error bars Vo encompass uncertainty
based on MLO and Tenerife Langleys.

Flight  1, June 18, 1997
-No diff. GPS available. Altitudes are pressure altitudes
-Calibration constants Vo are same as June 21. 
-Completely cloud free
-Meteo file 16.9033-19.5694 UT
-O3 = 315 DU from TOMS EP
-Extinction and H2O Density profile 17.55-18.1 UT (up spiral) west of Tenerife
 (smoothing: aerosol prof. =0.99999, H2O prof. =0.9999) 

Flight  3, June 21, 1997
-No diff. GPS available. Altitudes are pressure altitudes
-Calibration constants Vo are from Langley plot of June 27. 
-Vo at 864 nm adjusted manually to be closer to April 97 Mauna Loa Cal.
-Vo at 1020 nm adjusted manually to be closer to April 97 Mauna Loa Cal.
-Vo at 1060 nm is from Langley July 6
-Vo at 1557 nm is from Langley July 6. 
-Data are given after 13.9 UT. Almost completely cloud free
-Meteo file 13.5767-18.4228 UT
-O3 = 298 DU from TOMS EP
-Extinction and H2O Density profile 15.35-15.9 UT (up spiral) North-west of Tenerife
 (smoothing: aerosol prof. =0.99995, H2O prof. =0.99995) 

Flight  7, June 27, 1997
-Langley plot flight
-No meteo data for most of the flight. Pressure is from UWPH, uncorrected for flow.
-No diff. GPS available. Altitudes are pressure altitudes
-Calibration constants Vo are from this Langley plot
-Almost completely cloud free
-O3=277 DU from AATS-14 retrieval. TOMS EP Izana overpass value is 286 DU

Flight  8, June 30, 1997
-No diff. GPS available. Altitudes are pressure altitudes
-Calibration constants Vo are from Langley plot of June 27.
-Vo at 864 nm is from Langley July 6.
-Vo at 1060 nm is adjusted manually between Langleys June 27 and July 6
-Vo at 1557 nm is adjusted manually between Langleys June 27 and July 6.   
-AOD at 1020 nm too high. Flagged out in ACE-2 archive
-Almost completely cloud free
-Meteo file 14.0003-18.6956 UT
-O3 = 297 DU from TOMS EP
-Extinction and H2O Density profile 15.4-16.0 UT, up spiral
 (smoothing: aerosol prof. =0.99997, H2O prof. =0.99997) 

Flight  9, July 1, 1997
-No diff. GPS available. Altitudes are pressure altitudes
-Calibration constants are same as flight 8 
-Meteo file 12.5003-17.7867 UT
-O3 = 297 DU from TOMS EP
-Extinction and H2O Density profile  15.2415-16.0867 UT, up spiral 
 (smoothing: aerosol prof. = 0.9995, H2O prof. =0.9995) 
-Extinction and H2O Density profile  16.0867-16.56 UT, down spiral 
 (smoothing: aerosol prof. = 0.9999, H2O prof. =0.9999) 

Flight  11, July 4, 1997
-No diff. GPS available. Altitudes are pressure altitudes
-Calibration constants are same as flight 8 
-Meteo file 11.0006-17.0961 UT
-O3 = 290 DU estimated from TOMS EP map. No measurements over Tenerife.
-Data at 525,712,862 and 1020 are bad.
-almost cloudfree. Most of the flight instrument was parked.

Flight  12, July 5, 1997
-Diff. GPS available for part of the flight (7.2-12.0289 UT) but not used because of bumps.
-Altitudes are pressure altitudes
-Calibration constants are same as flight 8 
-Meteo file 9-19.2353 UT
-Most channels become bad after 12.4 UT, therefore no data archived after that.
-O3 = 306 DU TOMS EP.
-almost cloudfree.

Flight 13, July 6, 1997
-Langley plot flight
-Calibration constants Vo are from this Langley plot
-diff. GPS data 14.3389-20.0768 UT
-Altitudes are diff. GPS altitudes
-Meteofile 15.5003-20.0781 UT
-Data are given after 16.00 UT, cloudfree
-O3=280 DU from AATS-14 retrieval. TOMS EP Izana overpass value is 300 DU

Flight 14, July 7, 1997
-Calibration constants are same as flight 13
-diff. GPS data 11.1756-18.4703 UT
-Altitudes are diff. GPS altitudes
-Meteofile 10.5006-18.4694 UT
-Data are after 14.76 UT are strange (dirt?) and not archived
-O3=297 DU from TOMS EP

Flight 15, July 8, 1997
-Sahara dust
-Calibration constants Vo are from Langley plot of July 6.
-Vo at 499 nm is from Langley July 14
-Differential GPS data 9.8947-11.7097 UT
-Meteo Data 9.0006-11.7089 UT
-Almost completely cloud free
-O3 = 288 DU from TOMS EP
-Extinction and H2O Density profile 10.31-11.05 UT (down spiral), West off the coast of Gran Canaria
 (smoothing: aerosol prof. =0.999, H2O prof. =0.999) 

Flight 16, July 9, 1997
-Some Sahara dust left, N-S gradient.
-Calibration constants Vo are same as flight 15.
-Differential GPS data 12.1856-17.6986 UT
-Meteo Data 12.0006-17.6989 UT
-Completely cloud free
-O3 = 282 DU from AATS-14 retrieval, TOMS EP Overpass is far away 291 DU.

Flight 17, July 10, 1997
-"Ship day"
-The optical window became dirty after 12.2 UT. A quasi Langley plot towards the
 end of the flight and some manual changes (within the bounds given from Langley
 plots on July 6 und July 10) allow to save the data at least at some wavelengths.
 Don't use any data at 525 and 1018 nm.
-Clouds 14.5-14.7 UT
-O3 = 301.5 DU from TOMS EP
-Meteo file 12.0-19.71 UT
-Diff. GPS 11.7386-19.7147
-Extinction and H2O Density profile 15-16.05 UT (up spiral) "close" to R/V Vodijanitsky
 (smoothing: aerosol prof. =0.9995, H2O prof. =0.9995) 

Flight  18, July 14, 1997
-Langley plot flight
-Lat long from NOVA
-Pressure from UWPH, corrected for flow +14 mbar.
-diff. GPS is available only for part of the flight. Altitudes are pressure altitudes
-Calibration constants Vo are from this Langley plot
-Some clouds below 700 m
-O3=285 DU from AATS-14 retrieval. TOMS EP Izana overpass value is 304.6 DU

Flight 20, July 17, 1997
-Sahara Dust and Izana comparison
-Calibration constants are from Langley plot of July 14. Adjusted manually at 1557 nm.
-Some clouds before 14.5 UT
-O3 = 287.5 DU from TOMS EP
-Extinction and H2O Density profile 15.42-16.1 UT (down spiral) South of Tenerife.
 (smoothing: aerosol prof. =0.9995, H2O prof. =0.99995)
-Meteo-File:14.006-19.8364
-Diff. GPS: 14.2094-19.8369

Flight 21, July 18, 1997
-Calibration constants are from Langley plot of July 14. 
-O3 = 291 DU from AATS-14 retrieval. TOMS EP 292 DU is far away.
-Meteo-File:7.5003-16.1817
-Diff. GPS: 6.6289-13.7189
-Do not use 1020, 1060 and 1558 nm channels
_______________________________________________________________________________
Version 1.0

Changes from version 0.9 are:

Resultfiles Rddmmmyy.yyy.asc (entire flight) and water vapor density profiles 
(Rddmmmyy.yyy.h2o_prof.asc) have now uncertainty of columnar H2O. Therefore one column added to
these files (see file header).
New central wavelengths based on new Barr filter scans, and shift of CWVL with temperature
New NO2 x-sections based on new filter scans and Harder et al. x-sections
New O3 x-sections based on new filter scans and MODTRAN 3.7 v1.0
Correct for O2-O2 absorption (380 and 1060 nm) using Greenblatt et al. x-sections.
Correct for H2O absorption at 712, 1020 and 1558 nm based on MODTRAN 3.7 v1.0
New H2O retrieval coeff. based on MODTRAN 3.7 v1.0
Slightly different calibration constants. Use MLO value at 940 nm.
_______________________________________________________________________________
Version 0.9

Changes from version 0.8 are:
Timing should be within 1 second for all flights
Errorbars include now an 0.010 mV error in Signal.
Updated dark signals (almost identical)
Pressure and Temp data are now from met files. Less noise in pressure and 
measured temperature.

Flight  3, June 21, 1997

-No diff. GPS available yet. Altitudes are pressure altitudes
-Calibration constants Vo are from Langley plot of June 27. 
-Vo at 1557 nm is from Langley July 6. 
-Vo at 864 nm adjusted manually to be closer to April 97 Mauna Loa Cal.
-Data are given after 13.9 UT. Almost completely cloud free
-Meteo file 13.5767-18.4228 UT
-O3 = 298 DU
-Extinction and H2O Density profile 15.35-15.9 UT (up spiral) North-west of Tenerife
 (smoothing: aerosol prof. =0.99995, H2O prof. =0.99995) 

Flight 15, July 8, 1997

-Sahara dust
-Calibration constants Vo are from Langley plot of July 6.
-Data are given only for times where differential GPS data available (9.8944-11.7097)
-Almost completely cloud free
-O3 = 288 DU
-Extinction and H2O Density profile 10.31-11.05 UT (down spiral), West off the coast of Gran Canaria
 (smoothing: aerosol prof. =0.999, H2O prof. =0.999) 

Flight 17, July 10, 1997

-"Ship day"
-The optical window became dirty after 12.2 UT. A quasi Langley plot towards the
 end of the flight and some manual changes (within the bounds given from Langley
 plots on July 6 und July 10) allow to save the data at least at some wavelengths.
 Don't use any data at 525 and 1018 nm.
-Clouds 14.5-14.7 UT
-O3 = 301.5 DU
-Meteo file 12.0-19.71 UT
-Diff. GPS 11.7386-19.7147
-Extinction and H2O Density profile 15-16.05 UT (up spiral) "close" to R/V
 Vodijanitsky (smoothing: aerosol prof. =0.9995, H2O prof. =0.9995) 

Flight 20, July 17, 1997

-Sahara Dust and Izana comparison
-Calibration constants are from Langley plot of July 14. Adjusted manually at
 1557 nm.
-Some clouds before 14.5 UT
-O3 = 287.5 DU
-Extinction and H2O Density profile 15.42-16.1 UT (down spiral) South of Tenerife.

_____________________________________________________________________________

Version 0.8

General remarks:

Changes from version 0.7 are:
 We now use differentially corrected GPS altitudes, latitudes and longitudes. Therefore altitudes
 should be very close to geometrical altitude
 Errorbars include now an 0.005 mV error in Signal versus 0.001 mV in earlier versions.
 Release of first results for flight 15

Flight 15, July 8

-Sahara dust
-version 0.8 is the first release of results for this flight
-Calibration constants Vo are from Langley plot of July 6.
-Data are given only for times where differntial GPS available. Almost completely cloud free
-O3 = 288 DU
-Extinction and H2O Density profile 10.31-11.05 UT (down spiral), west off the coast of Gran Canaria

Flight 20: We now use differentially corrected GPS altitudes. 
           Therefore altitudes should be very close to geometrical altitude

____________________________________________________________________

Version 0.7

General remarks: 

-The data set is not completely cloud screened (see specific remarks below) 
-The final pressure calibration of the PELICAN sensor is used if Transvector was
 functional
-Note that all altitudes are pressure altitudes rather than geometrical altitudes
-Columnar ozone is from Earth Probe TOMS
-Channels centered at 712, 1019 and 1059 nm have some uncorrected gaseous
 absorption. Don't use any aerosol optical depth or extinction at these
 wavelengths.

Specific remarks concerning individual datasets:

Flight  3, June 21, 1997

-Calibration constants Vo are from Langley plot of June 27. 
 Vo at 1557 nm is from Langley July 6. 
 Vo at 864 nm adjusted manually to be closer to April 97 Mauna Loa Cal.
-Data are given after 13.9 UT. Almost completely cloud free
-O3 = 298 DU
-Extinction and H2O Density profile 15.35-15.9 UT (up spiral) North-west of Tenerife

Flight 17, July 10, 1997

-Transvector failed after 17 UT. For the entire flight the navigation data from
 NOVATEL are used. Pressure data from Univ. of Wash. sensor are used (+14 hPa,
 to correct for pumps)
-The optical window became dirty after 12.2 UT. A quasi Langley plot towards the
 end of the flight and some manual changes (within the bounds given from Langley
 plots on July 6 und July 10) allow to save the data at least at some wavelengths.
 Don't use any data at 525 and 1018 nm.
-Clouds 14.5-14.7 UT
-O3 = 301.5 DU
-Extinction and H2O Density profile 15-16.05 UT (up spiral) "close" to R/V
 Vodijanitsky

Flight 20, July 17, 1997

-Calibration constants are from Langley plot of July 14. Adjusted manually at
 1557 nm.
-Some clouds before 14.5 UT
-O3 = 287.5 DU
-Extinction and H2O Density profile 15.42-16.1 UT (down spiral) South of Tenerife.
_____________________________________________________________________________

Version 0.0 -0.6 highly prelim releases. Don't use those anymore.