Field Notes

When: Date: Sep. 8, 2004 , Day: 252 , Watch Time: 10:15am arrive Vaira.
Where: Tonzi/Vaira Ranch
Who: Siyan and Qi Chen
Weather: Sunny, nice breeze
Phenology: dead grass and yellow tree leaves

Summary & Problems

1. Laptops in Tower and Floor site were working well. No RAW data missing.
2. Laptop in Vaira stopped working on Day 241. We lost 10 day RAW data. Maybe the laptop needs to be changed as soon as possible.
3. Solar panel’s Amps = 0.0 amps. Something wrong with the power system?
4. CO2 profile system worked well. The cell temp around 35 ^oC (< 50^oC).
5. TDR instrument worked well with charged battery (13.4 v).
6. Tree leaves were collected.

Tonzi_Tower Site

1. Fence and gate power: >12.0 v.
2. Panel and Batteries: 14.0 v; 0.0 amps; 4.0 amps.
3. Reading from Gillsonic screen before downloading data.

   Time	10:12:14
   Path/File name	D:TW4_252.flx
   	mean	std		mean	std
   w	0.79	0.418	Ts	40.617	1.361
   u	-0.04	0.973	H2O	1.911	0.009
   v	0.49	0.82	CO2	1.393	0.022

4. Data were downloaded. No problem.
5. Check calibration cylinders;
   CO₂ 2000 psig; flow 4 psi. (Installed on Jul. 21, 2004, 428.7 ppm)
   N₂ 820 psig; flow 0 psi.
   Manually calibrate Li-800. Yes/No.
6. The values of CR10X and CR23X datalogger looked good.
7. I closed the gate and set up fence.

Toniz_Floor Site

1. Fence and gate power: >12 v.
2. Panel and Batteries: 13.6 v; 13.7 amps; 2.8 amps.
3. Readings from Gillsonic screen before downloading data.

   Time	11:15:01
   Path/File name	D:FL4_252.flx
   	mean	std		mean	std
   w	-0.138	0.302	Ts	38.591	1.166
   u	-1.89	1.171	H2O	1.168	0.039
   v	0.45.	0.395	CO2	1.446	0.013

4. Download data. No problem.
5. MD-9 system connections were good.