The 5 minute statistics of data from the turbulence tower, for the entire dataset, Jul 8 2009 to the present have been recomputed, and written to the NetCDF files. The new values incorporate the following changes:
- In each 20 Hz sample from a CSAT3 sonic, if any of the CSAT diagnostic bits are non-zero, then the values for that sample (u,v,w,tc) are marked as missing, and not added to the 5 minute statistics. This should result in better 5 minute statistics by excluding data when the transducer signals are poor, such as during rain.
- The calculation of the CSAT3 sonic diag value has changed. Previously the high-rate value could vary from 0 to 31, depending on which diagnostic bit was set. Now the high-rate diag value is just a 0 (no bits set) or 1 (one more more bits set), and the average is now the fraction of time in the 5 minute period that one or more diagnostic bits were set.
- The LICOR 7500's have a inherent sampling lag of 0.186 seconds, as documented in the manual from Licor. Our previous processing did not account for that lag when computing covariances between the sonic winds and the h2o and co2 from the Licor. This could result in increased values for the computed fluxes of water vapor and CO2.
- Units of CO2 have been changed from mmol/m^3 to g/m^3, the same as for H2O from the 7500s.
Aug 15, 11:10 MDT
Logged into the DSM and checked that the Licor 7500 delay parameter was set to 0 on all units. Shut down the data process, and used minicom. Do "(Outputs ?)" to query the, and "(Outputs (BW 10))" to resume the licor output.
Conclusion: all Delay values were set to 0, as they should be.
adn minicom ttyS2 ctrl-A w (enable line wrap) ctrl-A e (enable echo) ctrl-A f (send break) (Outputs ?) (Outputs (BW 10)) ctrl-A q (quit minicom) aup
ttyS2, 2m:
Outputs (BW 10)(Delay 0)(SDM (Address 7))(Dac1 (Source NONE)(Zero 0)(Full 5))(Dac2 (Source NONE)(Zero 0)(Full 5))(RS232 (Baud 9600)(Freq 1e 1)(Pres TRUE)(Temp TRUE)(Aux FALSE)(Cooler FALSE)(CO2Raw TRUE)(CO2D TRUE)(H2ORaw TRUE)(H2OD TRUE)(Ndx FALSE)(DiagVal TRUE)(DiagRec FALSE)(L abels FALSE)(EOL "0A")))
ttyS11, 16m:
(Outputs (BW 10)(Delay 0)(SDM (Address 7))(Dac1 (Source NONE)(Zero 0)(Full 5))(Dac2 (Source NONE)(Zero 0)(Full 5))(RS232 (Baud 9600)(Freq 1 e1)(Pres TRUE)(Temp TRUE)(Aux FALSE)(Cooler FALSE)(CO2Raw TRUE)(CO2D TRUE)(H2ORaw TRUE)(H2OD TRUE)(Ndx FALSE)(DiagVal TRUE)(DiagRec FALSE)( Labels FALSE)(EOL "0A")))
ttyS17, 43m:
(Outputs (BW 10)(Delay 0)(SDM (Address 7))(Dac1 (Source NONE)(Zero 0)(Full 5))(Dac2 (Source NONE)(Zero 0)(Full 5))(RS232 (Baud 9600)(Freq 1 e1)(Pres TRUE)(Temp TRUE)(Aux FALSE)(Cooler FALSE)(CO2Raw TRUE)(CO2D TRUE)(H2ORaw TRUE)(H2OD TRUE)(Ndx FALSE)(DiagVal TRUE)(DiagRec FALSE)( Labels FALSE)(EOL "0A")))
Arrived: 10:12am MDT
Departed: 1:45pm MDT
Ned and I did a couple of chores on this visit. First, we fixed the 43M sonic. It seemed to be the port on the Emerald Card. Switched 43M sonic from port16 to port20. Ned updated the xml. Second, we replaced two 15M cable from 43M Licor with a 30M cable. When we did this we noticed interrupts on the dsm. Having unplugged the battery charger for the laptop to talk with dsm, we plugged the charger back in and the dsm didn't give as much interrupts. [shrugging] Will keep an eye on this odd situation. Third, we clean all three Licors. Fourth, took guywire tensions.
Want to mention that there is a 2M tower just 15' South of the Turbulence Tower. WTF?
Also, there are no more ports on ethernet switch or 120AC power.