CSI below-canopy flux system 

** 30 minute averages of 10 minute data **

Installed at Willow Creek on 14 May 2002

'The following sensors are measured at 10 Hz:
'CSAT3             three dimensional sonic anemometer
'CS7500 (LI-7500)  open path infrared gas analyzer (co2 and h2o)
'HMP45C            temperature and relative humidity probe
'FW05		   Fine Wire Themocouple
'Q7.1 		   Net Radiometer

Sensor height: about 2m above soil surface

Flux computations: Computed by CS5000 data logger using program written by CSI.

;Data format (columns):
; 0 year
; 1 jday
; 2 hhmm
; 3 Fc_irga; mg/(m^2,s) carbon flux
; 4 LE_irga; W/m^2 latent heat flux
; 5 Hs; W/m^2 sensible heat flux (sonic)
; 6 H; W/m^2 sensible heat flux (fine wire TC)
; 7 u_star; m/s
; 8 Rn_Avg; W/m^2 net radiation from REBS Q7.1 (wind corr applied)
; 9 co2_Avg(1); mg/m^3 from licor 7500 (open path)
;10 h2o_Avg(1); g/m^3 from licor 7500 (open path)
;11 Ts_Avg(1); deg C from sonic
;12 FW_Avg(1); deg C from fine wire TC
;13 h2o_hmp_Avg(1); g/m^3 from Vaisala HMP-45C
;14 t_hmp_Avg(1); deg C from Vaisala HMP-45C
;15 rh_hmp_Avg(1); fraction from Vaisala HMP-45C
;16 press_Avg(1); kPa from licor 7500 (open path)
;17 wnd_dir_compass(1); wind direction (deg from True N)
;18 wnd_spd_1(1); wind speed (m/s) from sonic 
;19 std_wnd_dir_1(1); standard deviation of wind speed (deg)
;20 h2o_hmp_Std(1); standard deviation of gH2o/m^3 from HMP-45C
;21 t_hmp_Std(1); standard deviation of deg C from HMP-45C
;22 rh_hmp_Std(1); standard deviation of fraction from HMP-45C


Data acquisition notes (documented in WILCRK3.CR5):
----------------------

'Changed Time Series DATA TABLE: Number of records from 1000 to -1 which avails all avaialbe memory (after 
'other memory requirements are met)to ts data. (DataTable (ts_data,flag(8),-1) New filename=WilCrk2.CR5.  
'5/14/02 Set CSAT3 Const angle to -56 (head pointing at 304). Deployed system at Willow Creek
'WilCrk1.CR5 is derived from rt_mst_2.cr5 (see below). It was edited by Ed Swiatek on May 10,2002 so that it
'supports "Custom" Menu
'rt_mst_1.cr5 is based on 'c:\cr5000\programs\3d_li_eb5k1_1.cr5
'written by Ed Swiatek, CSI, 12 July 01
'    This file was edited in the field by RT on 7/24/01 according to instructions sent by Myron via email 7/23/2001 
'    Edited file was save as :RT_MST_2.CR5 - Also fixed the missing ")" problems found by Myron.

'Based on flx5k1_1.cr5.

' This CR5000 program measures turbulent sensors at 10 or 20 Hz.  The time series can be
'saved to a PC Card.  The CR5000 will also compute on-line turbulent fluxes from the
'measured data.  The flux table saves all the cross products that are required to rotate
'the on-line fluxes into natural wind coordinates in post processing following:
'
' Kaimal, J. C. and Finnigan, J. J.: 1994, Atmospheric Boundary Layer Flows, Their
'   Structure and Measurement, Oxford University Press, New York, 289 pages.
'
' Tanner, C. B. and Thurtell, G . W.: 1969, Anemoclinometer measurements of reynolds
'   stress and heat transport in the atmospheric surface layer, Final Report, United
'   States Army Electronics Command, Atmospheric Sciences Laboratory, Fort Huachuca,
'   Arizona.