Field Notes

When: Date: Aug. 17, 2004, Day: 230, Watch Time: 10:30 am
Where: Tonzi/Vaira Ranch
Who: Dennis and Siyan
Weather: Sunny, nice, warm but not hot, breeze
Phenology: dead grass; Oak leaves turn to yellow.

Vaira_Grass Site

1. Fence and gate power: >12.0 v.
2. Panel and Batteries: 13.1 v; 13.4 amps; 2.1 amps.
3. Reading from Gillsonic screen before downloading data. (The value of H2O and CO2 should be in the range of 0 – 5 v.). Gillsonic.exe was frozen on D220 and caused 10-day data lost.
   

   Time	17:36:50
   Path/File name	VR4_220.flx 1023.933MB left
   	mean	std		mean	std
   w	0.26	0.345	Ts	35.343	0.351
   u	-0.39	0.979	H2O	2.23	0.064
   v	-0.21	1.024	CO2	1.384	0.005

4. Download data. Readings were OK from Gillsonic screen after downloading.
5. Correct PC’s clock by using GPS time. PC’s clock (9:40) was 3 minutes faster than GPS time (9:37). Reset up at 9:37:49.
6. Dennis cleaned up the dirt and bird crap on Pyranometer.
7. Check CR23X with two multiplexer (Ted re-set it on July 21-23, 2004):
   Today was the first time of downloading the data after Ted’s new setup.
   CG1_UP (longwave_incoming) = -1.13 maybe need switch wirings.
8. Closed gate and set up fence.