readme_merged_CMDL_042402.txt
files created: 4/24/02 by chg@io.harvard.edu

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informed of how you are using our data and of any publication plans. Please acknowledge the data source as a citation,
or in the acknowledgments if the data have not yet been published. If we feel that we should be offered participation as
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data. If your work directly competes with our analysis we may ask that we have the opportunity to submit a manuscript
before you submit one that uses unpublished data. In order to maintain these measurements we periodically need to
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merged data: CMDL flask data merged with in-situ data averaged over filling period. The filling period was used as the last 15% of the time period during which the flask pump was activated (pump switching times from Britt Stephens).
An additional lag time was optimized by maximizing the correlation between CO (in situ) and CO (flasks), such that the switch signal was delayed by 4 seconds.

name convention:
merged_CMDL.csv

File contains data for all flights (except 000728a and 000801a)
1	MONTH: month of 2000
2	DAY: day of month
3	GMT: UND data recording time, in seconds since midnight (GMT)
4	CO: CO data (1 hz), corrected for time lag, in ppb 
5	PALT_M: pressure altitude, in m
6	PMB: ambient pressure, in mbar
7	TRASP_MS: true air speed, in m/s
8	TAIR_C: air temperature, in deg C
9	TDEW: dew point, in deg C
10	LAT: latitude, in deg
11	LON: longitude, in deg EAST
12	GSPD_MS: ground speed, in m/s
13	HEADING: heading, in deg (north = 0)
14	H2OG_KG: h2o mixing ration, in g/kg
15	THETA: potential temperature, in deg K
16	CO2: CO2, corrected for time lag, in ppm
17	vertwnd: vertical wind speed, in m/s
18	vertvel: vertical speed of aircraft, in m/s
19	uwind: x-component of horizontal wind vector (where the wind blows to, not where it comes from)
20	vwind: y-component of horizontal wind vector (where the wind blows to, not where it comes from)
21	GNDHGT: ground elevation (from digital elevation map), in m
22	GMT_GPS: gps time
23	ALT_GPS: gps altitude, in m above mean sea level
24	PROFIL: counts through vertical profiles (automatically generated)
25	MLHASL_M: mixed layer height (estimated from vertical profiles of theta, h2o, co2 and CO), in m above mean sea level
26	FLEND: End of averaging period, in seconds since midnight (GMT, from UND-TIME)
27	CO2_CMDL: CMDL CO2 data, in ppm
28	CH4_CMDL: CMDL CH4 data, in ppb
29	CO_CMDL: CMDL CO data, in ppb
30	H2_CMDL: CMDL H2 data, in ppb
31	N2O_CMDL: CMDL N2O data, in ppb
32	SF6_CMDL: CMDL SF6 data, in ppt
33	C13_CMDL: CMDL delta C13 data
34	O18_CMDL: CMDL delta O18 data
35	FLSTART: Beginning of averaging period, in seconds since midnight (GMT, from UND-TIME)
36	DCO: Standard error for CO averaged over filling period (error of the mean)
37	DCO2: Standard error for CO2 averaged over filling period (error of the mean)
38	ALPHA:
39	O2_P1:
40	O2_P2:
41	O2_FLOW:
42	CMDL_SW:
43	DPALT_M: Standard error for PALT_M averaged over filling period (error of the mean)
44	DTAIR_C: Standard error for TAIR_C averaged over filling period (error of the mean)
45	DH2OG_KG: Standard error for H2OG_KG averaged over filling period (error of the mean)
46	DUWIND: Standard error for UWIND averaged over filling period (error of the mean)
47	DVWIND: Standard error for VWIND averaged over filling period (error of the mean)
48	DVERTWND: Standard error for VERTWND averaged over filling period (error of the mean)
49	DVERTVEL: Standard error for VERTWND averaged over filling period (error of the mean)
50	FREQU: Number of seconds in averaging period (flask sampling time period)