Dan and Kris onsite; ground fairly hard, some cracks
Purpose: Fix source of noise in krypton data (may require replacing sonic with serializer)
1506, called me (Steve O.) in Boulder; still see noise; lower mast
~1530 reseated all connectors; noise went down by a factor of 4.
~1540 connecting spare (1389) handheld; noise gone
~1545 cleaned krypton with water; signal increased from 0.02V to 0.10V, still no noise
~1550-1623 swapped kryptons (removed 1390) and electronics; decided it was best to remove sonic boom to get access to krypton head
(thus need to restart tilt correction at this time, which we probably would have done because the mast was down)
~1630-1645 raise mast; krypton still checks out okay, and WWW plots show variance that match the other stations
1657: Have just updated ../cal_files/no_QC/krypton_ncar4.dat to use new sensor calibration.
2 Comments
Dan Rajewski
Kris and Dan evaluated the sonic tilt correction at NCAR Site 4 around 11:45 CDT Wednesday July 6. The azimuth readings averaged to 354.2 degrees so that the tilt correction should be 174.2 degrees.
Tilt corrections were also determined for the ISU flux towers and those were updated in the logger programs.
Dan visited the pathway close to NCAR Site 2 (around 13:15) to keep the area clear of short corn.
Gordon Maclean
Jul 8, 16:20 pm MDT: restarted statsproc on EOL server so that it uses the calibration coefficients for krypton 1389 for data after Jul 5, 16:00. Reran processing for Jul 5,6,7. When the data for Jul 8 is rsync'd tonight, then that day's data will be fully reprocessed with the correct krypton coefs.