Field Notes

Sherman Barn: 2020-01-07 13:45:00 (DOY 7)
Author: Daphne Szutu
Others: Joe, Camilo

Summary: Regular data download/collection, spectral, updated 7700 wash settings, set 7550 clock forward 4 min, measured well level, RH was bad--fixed, some camera data missing

2020-01-07
Sherman Barn

Joe, Camilo, and I arrived at 13:45 PST. It was a cold but mostly sunny day with foggy horizons. The pasture grass is short and green west of the tower, but still brown north of the tower.

Top of pipe to water level = 68.6 cm (2.70ft)
Top of pipe to ground = 19.8 cm (0.78ft)
Sensor psi reading = 0.736 ~ 52 cm

I collected met, camera, USB GHG, and game cam data. The game camera clock was still accurate. RH data was bad (just noise); the wiring was bad (RH signal was in AG channel instead of H channel) and I fixed it. I changed the 7700 wash settings to be consistent with other sites: spray changed from 20 sec to 10 sec and spin changed from 20 sec to 30 sec to allow enough time to spin away the spray water. I changed the 7550 clock from 13:59 to 14:03 to match the laptop time, restarted the 7550 box, and confirmed the 7550 and 7700 clocks matched the laptop time.

Camilo cleaned flux and rad sensors and checked out the pond north of the tower. Joe took spectral measurements and swapped desiccant for the water level sensor. The wash reservoir was full.

LI-7500 readings:
CO2 446ppm
H2O 414ppm
T 8.4C
P 102.2kPa
SS 100--> 101 after cleaning
LI7700 readings:
CH4 2.9ppm
RSSI 42-->74 after cleaning

We left at 14:20 PST.

Back in the lab, there were no camera photos after 2019-12-30. Maybe the current card is getting old.

0 photos found

3 sets found

4 SB_flux graphs found