Field Notes

<--2012-03-20 09:30:00 | 2012-04-03 09:50:00-->
Other sites visited today: Mayberry | Sherman Island

Twitchell Rice: 2012-03-29 09:30:00 (DOY 89)
Author: Joe Verfaillie
Others:

Summary: Check on site, calibrated LGR, DWR scaffolding at trailer, picked up DWR TC wire.

Twitchell
2012-03-29

I arrived about 9:30PDT. It was cool with hazy sun and little to no wind from the south east. I warmed up quickly. The field looks wetter than last week with the recent rains.

I talked to Jim and he said they hope to have tractors in the field in two or three weeks.

Our DWR scaffolding has been delivered by the trailer and conexes. I picked up the DWR TC wire from the Reclamation District 1601 office near the fruit orchard.

At the tower the LGR read:
8:38PST, 30.06C, 119.24Torr, 13.879usec, 10Hz, 2.111ppm

I calibrated the LGR. The low flow pressure is low, the external filters are okay. A bunch of rain water poured out of the insulation on the tubing when I disconnected it. The cal tank out there is almost empty 150psi at 3.276ppm CH4. Last cal was Jan 25, 2012.

Precal: 8:56PST, 29.49C, 99.55Torr, 13.873usec, 3.225ppm

After cal the reading was 3.289 – a little better.

The LI7700 had an rssi of 38% after cleaning the mirrors it was 68%. The wash reservoir was about half empty.

4 photos found

20120329TW_CornField.jpg ( 2012-03-29 10:33:57 ) Full size: 4000x3000
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