Field Notes

Sherman Barn: 2019-01-31 09:25:00 (DOY 31)
Author: Daphne Szutu
Others: Kuno, Jiangong

Summary: Regular data collection/cleaning, swapped 7500 for calibration

2019-01-31
Sherman Barn

Kuno, Jiangong, and I arrived at 9:25. It was calm, sunny, and clear. There were multiple ponds in our footprint and a big flock of white birds to the north.

I downloaded met, camera, and USB GHG data. The NR01 PRT temperature looks ok (tracks with Air T). The wash reservoir was 1/3 empty; we refilled it. We swapped the 7500 for calibration: sn 75H-2669 came off and sn 75H-2180 went on. Jiangong swapped the sensor and cleaned the flux and rad sensors and the camera enclosure window. After swapping the sensors, I uploaded the new configuration file, updated the pressure coefficients, and rest the box. Kuno and I tested the motion sensor by waving our arms at various distances and found the range to be ~3 m.

LI-7500 readings (sn 75H-2669--> sn 75H-2669 clean --> sn 75H-2180):
CO2 461ppm --> 435 --> 448
H2O 330ppm --> 570 --> 530
T 14.3C --> 14.7 --> 14.6
P 101.4kPa --> 101.4 --> 101.3
SS 95--> 104 after cleaning --> 98

LI7700 readings:
CH4 2.5ppm
RSSI 51 --> 75 after cleaning

We left at 10:05.

2 photos found

20190131SB_geese.jpg ( 2019-01-31 09:49:35 ) Full size: 1920x1440
Geese taking flight from one of the ponds near the Sherman Barn tower.