Field Notes

When: Date: Aug. 5, 2004, Day: 218, Watch Time: 10:30 am
Where: Tonzi/Vaira Ranch
Who: Dennis, Siyan, Qi, Lorraine
Weather: Sunny, nice, warm but not hot, breeze
Phenology: dead grass

Summary

1. Overall EC systems were running well. Data were downloaded
2. Today was the first time to download Vaira’s CR23X (gr3*.23x) data after Ted re-set up the new program with two multiplexers. CG1_UP (longwave_incoming) = -1.13, maybe need switch wirings.
3. Dennis and Lorraine took soil bulk density and moisture samples.

Vaira_Grass Site

1. Fence and gate power: >12.0 v.
2. Panel and Batteries: 13.6 v; 2.2 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.)

   Time	12:50:45
   Path/File name	VR4_218.flx 1023.33MB left
   	mean	std		mean	std
   w	1.22	0.527	Ts	29.333	1.444
   u	3.31	1.363	H2O	2.31	0.071
   v	0.27	1.237	CO2	1.476	0.0241

4. Download data.
5. Readings were OK from Gillsonic screen after downloading
6. 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.
7. Closed gate and set up fence.