Field Notes

Twitchell Rice: 2013-06-18 13:55:00 (DOY 169)
Author: Cove Sturtevant
Others:

Summary: Changed time to ETC/GMT +8. Added CO2 signal strength to output, removed Diag #2 from output. Potential problem with DO probe.

Twitchell Rice
2013-06-18

I arrived about 13:55 PDT. It was warm (21.6 C), sunny, and windy. The rice continues to grow steadily. I downloaded the GHG data and changed the time to ETC/GMT +8 at 13:01 PST. See Mayberry notes for explanation. I also added CO2 signal strength to the output and unchecked the Diagnostic Value #2. All towers with the 7550 now record CO2 signal strength and Diagnostic Value #1.

7500 readings:
CO2 = 395 ppm (same after cleaning)
H2O = 500 mmol m-3 (same after cleaning)
signal strength = 78.5 (78.8 after cleaning)
t = 22.8 C
p = 101.9 kPa
sos = 346.4 m s-1

7700 readings:
CH4 = 1.84 ppm (same after cleaning)
RSSI = 39 (bumped to 74 after cleaning)

MET looked good except for the DO probe reading INF. I pulled it out of the water to remove it but then it read 40 in air. I put it back in the water and it declined appropriately. I decided to leave it for Sara to check on Thursday.

0 photos found

6 sets found

12 TW_met graphs found