Explanation of LAS data files:
------------------------------

Output parameters:
-----------------


T1		: upper temperature sensor
T2		: lower temperature sensor
Press		: air pressure
U		: wind speed
Rn		: net radiation
HEATF		: sensible heat flux
Evaporation	: not calculated
Status		: unstable/stable*
HEATF daily	: daily averaged adapted heatflux
HEATF adapted	: adapted heatflux for missing data
Rn daily	: daily averaged Rn


Measurement or calculation?
--------------------------

T1, T2, Press 	: measurements
U, Rn		: measurements

HEATF		: calculated with EVATION (Kipp and Zonen software) from scintillation measurements - with measurements of path length visit April 2007

HEATF adapted	: adapted for lacking data (power shortage, Input Udemod, .. other reasons) 

HEATF daily	: daily averaged HEATF adapted values 

Rn daily	: daily averaged Rn measurements, excluding -9999 default value for missing data



Status information:
-------------------


The last column is always Status. It represents the result of the call to the LAS algorithm (LAS.DLL). Below a list of possible results and their meaning:

UNSTABLE 	 : Successful calculation, daytime.
 
STABLE  	 : Successful calculation, nighttime. 
 
NO DATA	 	 : Program has added a measurement row with invalid data because measurements were missing in the input file.
 
UNREALISTIC FLUX : Unrealistic heat flux detected (heat flux > net radiation) during UNSTABLE period.
 
INPUT <..> 	 : Algorithm rejected measurement data due to invalid input data, i.e. out of range. e.g. INPUT Udemod: signal strength > -10 mV


Missing data:
-------------

Jingchuan : no data from 01/07/2006 until 12/07/2006
	    no data from 16/11/2006 until 30/11/2006

Tangke :  measurement period unclear
	  no wind speed data during entire year
	  demodulated carrier signal exceeds treshold from 16/06/2006-31/07/2006 -> scintillation measurements not reliable = no sens heat flux calc.

Xinghai : power problems; no data during night except month September 2006
	  no temperature measurements of upper temperature sensor 29/03/2006 -> 15/04/2006


Remarks:
-------- 

Tangke : - wind speed data were replaced by average windspeed measured at the LAS location of 2005 and 2007
	   average=2.47 m/s  -> average value derived from 20/08/2005 to 3/10/2005 and 20/04/2007 to 02/05/2007 measurements

	 - date and time settings incorrect. From measurements of Rn, midday was estimated and from comparison with EWBMS results day was estimated. 
	   time difference = 10h; day difference = 60 days; year difference = 6 years

Xinghai : - temperature measurements of upper temp sensor were replaced by temp measurement of lower temp sensor - 0.5 degrees Celsius
	  - Rn during nighttime was replaced by -60W/m^2
	  - Sens Heat Flux during nighttime was replaced by -27.71 W/m^2 (April-July 06) and -16.31 W/m^2 (Aug, Oct and Nov 06)
	
	Sens Heat:
	-27.71 W/m^2   -> average value derived from April 2007 nighttime measurements
	-16.31 W/m^2   -> average value derived from September 2006 nighttime measurements

	Net Radiation:
	-60W/m^2  -> average value derived from September 2006 and April 2007 nighttime measurements