Field Notes
<--2014-04-28 10:15:00 | 2014-05-13 14:00:00-->Other sites visited today: Sherman Island | Twitchell Rice | East End | West Pond | Twitchell Alfalfa
Mayberry: 2014-05-07 10:45:00 (DOY 127)
Author: Cove Sturtevant
Others: Joe
Summary: Forgot portable tower truck key. Portable tower 7700 lost line lock on 5/5 - reason unknown. Took GPS reading and sonic orientation of LowVeg portable tower location. Scoped out HighVeg location for next week. New interface to 7700 fixed spin mirror issue
| Mayberry 2014-05-07 Portable Tower Joe and I arrived at the Low Veg (north) portable tower location at about 10:45 PDT. It was sunny and cool with a strong breeze right down the window to the large area of open water at this site. We forgot the keys to the truck so it has to stay here another week. This isn’t such a setback because we found that the 7700 has lost line-lock late in the evening on 5/5. A look at the data revealed some quick dropouts previous to 5/5 which seemed to correspond with very high winds. We reset the line-lock and everything was running fine. Joe was thinking of mounting the solar panel on the truck somehow to give it better exposure for low sun angles. Downloaded the data. Took GPS reading of Low Veg tower location: 38.05505° N, 121.7689° W Sonic orientation: 329° N magnetic. We set the 7700 cleaning settings using the new software interface. This fixed the issue with the bottom mirror spinner – sweeeeeet. Looks like the instrument wasn’t able to spin the mirror because the settings didn’t make sense saved in the old format. We also scoped out the site for the high veg location. Looks like it will work great. The location for next week is: 38.049681° N, 121.770027° W CO2: 400 ppm (402 after cleaning) H2O: 444 mmol m-3 (475 after cleaning) signal strength = 89.9% (90.6% after cleaning) t: 17.6 °C p = 101.4 kPa sos = 344.2 m s-1 CH4: 0 ppm (1.92 ppm after line lock) RSSI: 35% (88% after cleaning) Permanent Tower Site is nice and green with a clear layer of dead plant material. All was well. Updated 7700 settings with new interface. A-OK. 7500 readings: CO2: 398 ppm (401 after cleaning) H2O: 510 mmol m-3 (480 after cleaning) signal strength = 93.7% (95.2% after cleaning) t: 19.6 °C p = 101.4 kPa sos = 343.5 m s-1 Current 7700 readings: CH4 = 1.98 ppm (same after cleaning) RSSI = 45% (71% after cleaning) Reservoir was empty. Refilled. Met looked great. |
0 photos found
11 sets found
7 MB_flux graphs found
No data found for MB_met.
27 MB_tule graphs found
Can't check MBWPEESWGT_mixed
1 MB_cam graphs found
Can't check MBEEWPSWEPGT_cam
Can't check SIMBTWEE_met
No data found for MB_minidot.
Can't check MBSWEEWPBCBA
1 MB_processed graphs found
Can't check MB_fd
1 MB_fd graphs found