Field Notes

<--2013-02-14 13:15:00 | 2013-02-28 13:15:00-->
Other sites visited today: West Pond | DWR Corn | Sherman Island | Mayberry
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Twitchell Rice: 2013-02-21 09:00:00 (DOY 52)
Author: Joe Verfaillie
Others: Cove

Summary: Calibrated 7700, brought in DO, reset camera image size, repaired wash filter holding.

Twitchell
2013-02-21

I arrived about 9:00am with Cove. It was clear, sunny and cold with a brisk breeze from the north making it even colder. The field is still drying out with a few puddles here and there but mostly water free.

We calibrated the 7700 sn 0211. We cleaned the mirrors before calibration raising the RSSI to 65. The 7700 was off only a little: about +5ppb for zero and about +18ppb for span. The ambient reading (about 2.12ppm) did not change perceptibly.

The 7500s AGC was 30 and after cleaning it dropped to 16.

The DO was lying high and dry so we brought it back into the lab.

We reset the autocam to take full size photos again.

We brought it the tank of CH4 cal gas that had been out there since the time of the LGR. It is nearly empty as I recall.

The filter on the 7700 wash reservoir seemed okay with its electrical tape fix. We left it as is. Cove topped off the reservoir, but it was almost completely full.

0 photos found

6 sets found

12 TW_met graphs found