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Data Notices

January 26, 2006
P3 - Cloud andPrecip. Data for these parameters have been merged into one data file, called CloudProbes. Contact Tim Garrett for details.

November 30, 2005
P3 - NAerosol. WAS-time merged icartt and igor binary files have been created and posted.

November 9, 2005
P3 - NOy. The igor time wave in the igor zipped All1Sec merged NOy file was incorrect (it had only time for the last flight) and has been replaced.

November 9, 2005
RHB - NO2ph. Brian changed the uncertainty statement. No data values where changed.

October 14, 2005
P3 - O3, NOxy. Data from some earlier flights has a very small time offset. The following corrections were made to the O3 and NOy data sets:
Flt 040705: O3 and NOy were moved -1 sec
Flt 040711: O3 and NOy were moved +1 sec
Flt 040715: O3 and NOy were moved -1 sec
New merged files have been created and posted.

October 10, 2005
P3 - O3. Data from the flight of 040727 were offset in time by 1 second. Igor and Icartt files for this flight, 040727, and for the 1 sec, 60 sec, WAS time, 5 minute and all flights merged sets have been posted.

October 10, 2005
P3 - NAerosol. New igor and icartt data files are available for all flights and for merged 1 sec and all flight data sets.

October 05, 2005
P3 - PANs. The previous final posting of PANs data had a bad data point for MoPAN at 7/12/04 03:50:21. This value has been changed to a missing value. Igor and Icartt files for this flight, 040711, and for the 1 sec, 5 minute and all flights merged sets have been posted (averages generated for the WAS and 60 sec time base were unaffected).

October 03, 2005
P3 - NOy. Previous final data postings of NOy data were offset in time by a slight amount:
flts 040715: -2 seconds
flts 040727, 040807, 040811: -1 seconds
flts 040721, 040722, 040725, 040809: +1 seconds
flts 040803, 040806: +2 seconds
flts with no time offset: 040705, 040709, 040711, 040720, 040728, 040731, 040814, 040815
The final NOy data now posted (Revision number 3) have time stamps identical to the preliminary data; that is, peak values line up (in time) with preliminary NOy data.
New merged files (All flights, 1 Sec, 60 Sec, 5 min, and WAS time) have also been created and posted.
Also, the derived parameter Sum_NOy_ppbv no longer contains interpolated PAN values.
Sum_NOy_ppbv = NO + NO2 + HNO3 + all measured PANs

September 19, 2005
P3 - AircraftMis. WAS-time averaged data for the AircraftMis (aircraft air speed, etc.) parameter set are posted.

September 19, 2005
P3 - O3, NOy, AMS, CO, SO2. 5 minute merged data files for O3, NOy, AMS, CO, and SO2 files are posted.

September 16, 2005
P3 - AMS. New AMS data is available. The resolution of the data is now 5 minutes.

August 31, 2005
P3 - VOCsPTRMS. 5 minute time averaged files for the PTRMS 5 data are now available.

August 29, 2005
P3 - NO3N2O5. 5 minute time averaged files for the NO3 and N2O5 data are now available.

August 25, 2005
P3 - NH3, HNO3. 5 minute time averaged files for the NH3 and HNO3 data are now available.

August 25, 2005
P3 - flight tracks. PDF file The one page flight track summary that was distributed at the ICARTT workshop in New Hampshire had one flight track, 2004 07 31, missing. Sorry for any inconvenience.

August 24, 2005
P3 - PILS. 5 minute time averaged files for the PILS WSOC and PILS IC data are now available. Also, a 1 minute merged PILS WSOC file is now available.

August 22, 2005
P3 - aircraft. 5 minute time averaged files for the aircraft position and aircraft meteorology data are now available.

August 18, 2005
P3 - J Values. WAS - time averaged data for jNO3AL and jValAL data sets are now available. Averages for the combined (up and down) j values, and the standard deviation and number of non-missing points used in the average are given.

August 5, 2005
P3 - CO. New 1 sec and 60 sec time merged files have been posted, due to errors in the calculation.

August 4, 2005
P3 - VOCsWAS. On July 19, new files were submitted and posted by P.C. Murphy. A formatting issue arose with these icartt files, and correctly formatted icartt files were reposted on August 4. The revision note in the icartt files now reads (in part): R4: File reformatted to comply with icartt format. R3: data edited by P.C. Murphy per P.I. request. ethyne /= 1.154; Ethyl_benzene -= 0.35; o_xylene -= 0.42; m_p_xylene -= 0.88.

August 3, 2005
RHB - jO3. Final jO3 up and down data have been posted. Talk to Brian or Harald for details.

August 2, 2005
P3 - NOy. Final NO, NO2, and NOy data have been posted. A derived parameter, Sum_NOy_ppbv = NO+NO2+HNO3+PAN+PPN+MPAN (PANs interpolated to 1-s timebase) is now included. New files for all the merged data sets (All Flights, 1 sec, 60 sec, WAS-Time) have been posted as well.

August 2, 2005
P3 - flight tracks. PDF file A one page summary of flight tracks data.

June 29, 2005
P3 - VOCsWAS. The HCFC-134a parameter wasincorrectly named and should be named HFC-134a. The name has been changed and new files have been submitted, including the AllFlights merged file and the AllWAS merged files. However, no data has been changed.

June 16, 2005
RHB - VOCsGCMS. Paul G has completed his analysis of the samples acquired by the GCMS. He has added 12 compounds to the list of species, for a total of 83. Contact Paul for details. The newly added species are:
n_octane
methylheptane_2n4
methylheptane_3
trimethylpentane_224
trimethylpentane_234
trimethylpentane_233
CHCL3
CH2CL
CFCL3
CF2CL-CFCL2
trichloroethane_111
tetrachloroethene

May 26, 2005
RHB - NOy, O3clAL and O3uvAL. The latest files that were available for download did not get transferred to the revamped ETL server in late March. Thus, previous to today, if one clicked on the link to download, an earlier version of the file was downloaded, not the most current. This has been fixed. Users should check to see that they are working with the latest verions of these files, all with the revision date of 3/21/2005. Sorry for the inconvenience.

May 20, 2005
RHB - NO2ph. Brian submitted a new file - talk to him for details.

May 18, 2005
RHB - NO2CRD. Hans submitted a new file - talk to him for details.

May 13, 2005
P3 - NOxy. The time stamp for the preliminary NOxy data for the flight of 040731 is off by +18 seconds. This will be fixed in the final version of the data. Until final data is submitted, users should be aware of the timing error for this data.

May 13, 2005
P3 - PANs. The time stamp for the PAN data for the flight of 040731 was off by +18 seconds. This data file has been fixed, and new files for this flight and for the 1 sec, 60 sec, WAS time, and all flights merged files have been created and posted. Data values haven't changed, only the time stamp assoicated with them.

May 13, 2005
P3 - data summary. PDF file A one page summary of non-missing data values for individual parameters for each flight.

May 12, 2005
P3 - NAerosol. (from Donna) New NAerosol data is available for the 040727 flight. New all flights merged files, and 1 sec merged files have also been created.
(from Chuck) ICARTTers: Ann pointed out a problem with the aerosol size distribution data for 20040727. I managed to write over the files with data from the wrong flight prior to submission. So the header says 20040727 but the data are actually from another flight. My sincere apologies for this screwup, and I hope it hasn't caused anyone else any headaches. The correct NAerosol_P3_ file for 20040727 should now be available on the download site. Ann, Tim, and Rodney, I'll make new specialty files for 20040727 that are consistent with your instruments' size ranges ASAP. Please contact me with any questions -Chuck

May 11, 2005
RHB - JNO3. New JNO3 data from Brian.

May 11, 2005
P3 - PILS IC. (from Donna) New PILSIC been posted for all flights except the first flight 040705, where there was no data. New all flights merged files have also been created.
(from Rick Pelteir) We've found an error with the timing of our data. The PILS-IC species data itself is unchanged, but we had to alter the start/stop times associated with each point. The PILS-WSOC data will remain the same (e.g. unchanged).

May 11, 2005
P3 - WAS. A formatting error was found in the igor and icart files for the flight of 040722. This error resulted in an extra line of missing values at the end of the file. A corrected version is now avaible for download, as well as newly compiled All Flights (separate files for each flight) merged files. The WAS - time merged files were unaffected.

May 11, 2005
P3 - NH3. (from Donna) A new data file for the 040720 flight has been posted. New 1 sec, 60 sec, WAS time, and all flights merged files have been created.
(from John Nowak) From approximately 17:22 to 17:37 two decreases were recorded in the ion source flow. As discussed in the NH3 talks, a decrease in the ion source flow increases the residence time in the flow tube and in turn increases sensitivity. Ideally, the residence time is kept as short as possible to inhibit slower, competing ion-molecule reactions. So, the observed NH3 mixing ratios for this time period will decrease due to the increase in sensitivity. Unfortunately, no calibration was performed during this time period. Based on laboratory testing, the sensitivity scales linearly with residence time over the total flow used during ICARTT. Therefore, the observed mixing ratios have been reduced by 40% to 65% based on the calculated change in residence time from the previous and next calibration. This was caught and corrected for in the original data reduction, however, when converting the IGOR waves to ICARTT format I mistakenly chose the uncorrected wave to convert. I must also point out that this overlaps the biomass burning plume intersection. The NH3 biomass burning plume analysis presented at the data workshop was done with the corrected data. I apologize for any inconvenience this has caused. If you have any questions contact John Nowak.

May 4, 2005
P3 - NOxy. NO, NO2, and NOy data is not yet final. However, I've made an AllFlts (all flights, individual files/folder) and 1 sec (all flights in one file) merged data set. Please note that the O3 data in the icartt formatted files is NOT the final O3 data, which can be found in files with the data id of O3. Contact Ken Aikin for details of the merges, and Tom Ryerson for details about the data.

April 20, 2005
RHB - SO2 data has been resubmitted. I believe that the only change is that the lower limit of detection (LLOD) has been inserted in several places. Talk to Eric for details.

April 6, 2005
P3 - PAN data has been resubmitted. New versions are on a 1 sec time base (aligned with AOCTimewave). Merged 1 sec, 60 sec, and WAS files are also available. Thanks to Aaron Swanson and Frank Flocke for fine-tuning the data. Please contact them for details.

April 6, 2005
P3 - SSFRN and SSFRZ (SSFR - Solar spectral irradiance, Nadir and Zenith) final data has been submitted. Thanks to Steve Howard, John Pommier and Peter Pielewski.

April 4, 2005
P3 - There was a formatting error in the 60 sec merged Aircraft Met ICARTT-formated file. The data has not changed, but the formatting has been fixed. Sorry for the inconvenience.

April 1, 2005
P3 - There was a formatting error in the NCAR WAS (NMHC) data. The parameter named C2H3CL3 (methyl chloroform) should be C2HCl3 (trichlorethylene). New files have been created and posted; data values were not changed, only the parameter name.

March 31, 2005
P3 - New P3 GITCIMS file for the flight of 040722 has been posted. This file now has non-missing data for Sulf_nd and HO2RO2_nd parameters. New AllFlts zipped files were created, as well as 1 sec merge, 60 sec merge and WAS-time merged files.

March 30, 2005
RHB - New RHB files for jNO3, jNO2, and CO2 have ben posted. Notice the new parameter names (column names) in the jNO3 and jNO2 files.