Data and header information

  Year - 2003
  Day - 206 (July 25)
  Timezone - Local time is UTC - 6 hours
    All timestamps reported here are in UTC time
    Time is recorded at the beginning of average period.
  Measurement height - 36 m
  Canopy height - 27 m
  Roughness length is ~ 2-3 m (displacement is ~ 18 m)
  Location: Sylvania Wilderness old-growth maple/hemlock in upper Michigan, USA
  More info at: http://cheas.psu.edu/fieldsites/sylvania/sylvania.html
  Missing or invalid data is -999

Hi-frequency files 03206xxxx.csv

xxxx is starttime of data in hours and minutes (hhmm) - UTC
Frequency is 10 Hz
Data are not lag or spectrally corrected
Primary instruments - 
  Licor 6262 Infrared gas analyzer - CO2/H2O
  CSAT-3 sonic anemometer - u,v,w,T

  mm - Minutes
  sec - Seconds
  u - towards sonic wind speed (sonic axis is 228 degrees of true North) m/s
  v - cross sonic wind speed (left to right) m/s
  w - vertical wind speed m/s
** information on the meaning of the sign of u and v and meaning of Ts an be found at:
  ftp://ftp.campbellsci.com/pub/outgoing/manuals/csat3.pdf
  ur - roatated wind speed into mean wind direction m/s
  vr - rotated cross wind speed m/s
  wr - rotated vertical wind speed (to correct for sonic tilt, etc...) m/s
  ts - sonic virtual temperature - C
  C - calibrated, temp/pressure/water corrected CO2 mixing ratio - ppm
  q - calibrated, temp/pressure corrected water vapor mixing ratio - g/kg
  LI_P - internal Licor cell pressure - kPA
  LI_T - internal Licor cell temperature - C
  Wspd - horizontal wind speed - m/s
  Wdir - horiztonal wind direction - degrees from true N

Medium frequency top of tower micromet file 03206b.csv
Frequency is 1 min
 
  hhmm - hours and minutes
  t - Air temperature 36 m - C
  p - Atmoshperic pressure - mb
  rh - relative humidity - percent
  dp - dew point - C
  Rnet - Net radiation - W/m2
  leafwet - Leaf wetness (not eq -999, moisture is condensing) - kOhms
  q - Water vapor mixing ratio - g/kg
  PAR - Total photosynthetic active radation - umol/m2/s
  dPAR - Diffuse photosynthetic active radiation - umol/m2/s

Flux correction parameter file 03206corr.csv
Frequency is 30 min
  hhmm - hours and minutes 
  theta - horizontal rotation angle radians (not long term)
  phi - vertical rotation tilt correction radians (not long term)
  lagc - CO2-W lag time - seconds (negative = CO2 lags W)
  lagq - Q-W lag time - seconds (negative = Q lags W)
  cfactor - CO2 spectral correction factor - multiply Cflx by this value
  qfactor - Q spectral correction factor - multiple Qflx by this value 

Low frequency radiation flux measurement 03206corr.csv
Frequency is 30 min

Column     Name          Description                    Unit          Range/Notes
1          Year          Year                           Year          2000-3000
2          Month         Month                          Month         1-12
3          DOM           Day of Month                   Day           1-31
4          UTC           Universal Coordinated Time     Hour          0.0-23.5
5          DOY           Day of Year                    Day           1-366
6          F_day         Fraction of Day                              0-1
7          NetRad        Net radiation – 36 m           watts/m2
8          PAR           Photosynthetic active          umol/m2s
                          radiation – 36 m 
9         G             Soil heat flux – 75mm below    watts/m2

Low frequency micromet / profile data / soil data output file: 03206met.csv
Frequency is 30 min

FORTRAN Format code is: (i4.4,i3,i3,f5.1,i4,f6.3,61f12.3)

Column     Name          Description                    Unit          Range/Notes
1          Year          Year                           Year          2000-3000
2          Month         Month                          Month         1-12
3          DOM           Day of Month                   Day           1-31
4          UTC           Universal Coordinated Time     Hour          0.0-23.5
5          DOY           Day of Year                    Day           1-366
6          F_day         Fraction of Day                              0-1
7          CO2_36m       CO2 concentration at 36m/118ft ppm
8          CO2_21m       CO2 concentration at 21m/70ft  ppm
9          CO2_14m       CO2 concentration at 14m/45ft  ppm
10         CO2_7.6m      CO2 concentration at 7.6m/25ft ppm
11         CO2_3m        CO2 concentration at 3m/10ft   ppm
12         CO2_1.8m      CO2 concentration at 1.8m/6ft  ppm
13         CO2_0.6m      CO2 concentration at 0.6m/2ft  ppm
14         Atm_P_36m     Air pressure at 36m/118ft      mb
15         Wind_Spd_36m  Wind speed at 36m/118ft        m/s
16         Wind_Spd_20m  Wind speed at 20m/65ft         m/s
17         Wind_Deg_36m  Wind direction at 36m/115ft    deg           0-360
18         Wind_Deg_20m  Wind direction at 20m/65ft     deg           0-360
19         Q_36m         H2O mixing ratio at 36m/118ft  g/kg
20         Q_20m         H2O mixing ratio at 20m/65ft   g/kg
21         Q_10m         H2O mixing ratio at 10m/32ft   g/kg
22         Q_2m          H2O mixing ratio at 2m/6ft     g/kg
23         RH_36m        Relative humidity at 36m/118ft percent       0-100
24         RH_20m        Relative humidity at 20m/65ft  percent       0-100
25         RH_10m        Relative humidity at 10m/32ft  percent       0-100
26         RH_2m         Relative humidity at 2m/6ft    percent       0-100
27         Dew_Pt_36m    Dew point at 36m/118ft         degrees C
28         Dew_Pt_20m    Dew point at 20m/65ft          degrees C
29         Dew_Pt_10m    Dew point at 10m/32ft          degrees C
30         Dew_Pt_2m     Dew point at 2m/6ft            degrees C
31         Precip        Total precipitation            cm
32         Throughfall   Precip at bottom of tower      cm            No snow adapter
33         Leaf wetness  Leaf wetness at 36m/118ft      KOhms
34         T_36m         Air temperature – 36m/118ft    degrees C
35         T_30m         Air temperature – 30m/100ft    degrees C
36         T_23m         Air temperature – 23m/75ft     degrees C
37         T_20m         Air temperature – 20m/65ft     degrees C
38         T_15m         Air temperature – 15m/50ft     degrees C
39         T_10m         Air temperature – 10m/32ft     degrees C
40         T_7.6m        Air temperature – 7.6m/25ft    degrees C
41         T_1.8m        Air temperature – 1.8m/6ft     degrees C
42         T_0.6m        Air temperature – 0.6m/2ft     degrees C     
43         T_shed        Temperature in control shed    degrees C    Disconnected in Jan 03
44         Ta_100cm      Air temperature – 100cm/40in   degrees C
45         Ta_50cm       Air temperature – 50cm/20in    degrees C
46         Ta_25cm       Air temperature – 25cm/10in    degrees C
47         Ta_5cm        Air temperature – 5cm/2in      degrees C
48         SoilT_0cm     Soil temperature – 0cm/0in     degrees C
49         SoilT_5cm     Soil temperature – 5cm/2in     degrees C
50         SoilT_10cm    Soil temperature – 10cm/4in    degrees C
51         SoilT_25cm    Soil temperature – 25cm/10in   degrees C
52         SoilT_50cm    Soil temperature – 50cm/20in   degrees C
53         SoilT_100cm   Soil temperature – 100cm/40in  degrees C
54         SoilLWC_5cm   Soil moisture content – 5cm    vol fraction  0-1
55         SoilLWC_10cm  Soil moisture content – 10cm   vol fraction  0-1
56         SoilLWC_20cm  Soil moisture content – 20cm   vol fraction  0-1
57         SoilLWC_50cm  Soil moisture content – 50cm   vol fraction  0-1
58         SoilLWC_100cm Soil moisture content – 100cm  vol fraction  0-1
59         PAR_1m_1      Surface PAR (1m/3ft)           umol/m2s      20 ft after 6/28/2003
60         PAR_1m_2      Surface PAR site 2 (1m/3ft)    umol/m2s      40 ft after 6/28/2003
61         VPD_36m       Vapor Pressure Deficit - 36m   kPa
62         VPD_20m       Vapor Pressure Deficit - 20m   kPa
63         VPD_10m       Vapor Pressure Deficit - 10m   kPa
64         VPD_2m        Vapor Pressure Deficit - 2m    kPa
65         W_36m         Mean vertical velocity         m/s           Only good for nonpreliminary flux data
66         PAR_36m_2     Delta_T total PAR              umol/m2s      installed 6/27/2003
67         PAR_36m_Diff  Delta_T diffuse PAR            umol/m2s      installed 6/27/2003
