The mote brought down from 32m shows a significant amount of corrosion on the outer case of the din connectors;
however, the mote is working ok. The power/comms cable was bad. The +12v pin was disconnected. There was
minor corrosion on the pins on the Bulgin side. Removed backshell from Bulgin and did find corrosion even though there was potting compound.
Since the cable was coupled to a standard 10m cable I would assume water got in through the backshell. This cable was routed down
the tower which would expose the backshell.
UPDATE: Corrosion in box was probable due to the box missing one of the rubber seals at the bottom where the cables come in
Yesterday (19 jun) was an interesting day to look at SPN1 data. The morning was a thick overcast, so there was essentially no direct radiation until 11:30. The afternoon was clear, where diffuse was as low as 13% of global radiation at 17:00.
P.S. Here is some code to make a summary plot:
dpar(start="2013 jun 1 00:00",lenday=45)
ig = dat("Rsw.global")>20
hist((dat("Rsw.dfs")/dat("Rsw.global"))[ig[,1],1],n=50)
> box()
hist((dat("Rsw.dfs")/dat("Rsw.global"))[ig[,2],2],n=50); box(); title("Canopy Top")
hist((dat("Rsw.dfs")/dat("Rsw.global"))[ig[,1],1],n=50); box(); title("Under Canopy")
Canopy top shows a good mix of clear and overcast conditions, though more bimodal (fewer "mixed") conditions than I would have expected.
As expected, most of the under canopy light is diffuse, but amazingly there are a <few> data points with direct close to clear-sky values.
Weather: Clear skies
Summary: Outage of CO2 on C150 from 23:00 to 7:00, still bad tsoil temp at 4.4cm on a & b, ldiag action on sonic 43.9m
Big drop in Vmote on tsoil.a, will replace today.
Sonics: ok, some ldiag action on 43.9m at ~10:00.
TRH, P: ok
Wind Speed & Dir: ok
Soil, Rainr: Tsoila & Tsoilb at 4.cm still bad, Qsoil.b intermittent from 0:00 to 7:30
Vmote (rad, a, a2, b): 11 to 12.3, tsoil.a drop about 1 volt over the night
Radiation, Wetness: ok
H2O, CO2: EC150 CO2 was out 23:00 to 7:00
System (GPS, Vdsm): ok
Pond: ok
Hi Steve, Steve,
In case you need to log this, we were out near the SODAR today from ~5:30 - 5:45 and 6:55 - 7:00 (that's PM, local time).
Cheers,
~Glenn Wolfe
Forgot to log that this morning at about 0900 I cleaned all the under-canopy radiometers. I did the wetness drop trick to note the time.
At this time, I also added a PAR sensor at 2m, though it isn't really mounted and not exactly in a good spot.
Ned replaced the mote (was 9, now 8). The grey cable (mote console) was bad and needed to be replaced. Since mote 9 had obvious corrosion (of a type never seen before), he/Steve S decided to bring it down for check-out. I've changed the config (yet again -- lots of RIPs on cockpit!) and all is now well.
Tour today had people standing around the base of the tower from about 1515-1600. All went well.
The 32 and 20 meter sonics have dropped out for periods of time the last few nights. Here is a period of data from the 20 meter sonic, June 18 23:00 CDT, which is similar to data from the 32m meter sonic the previous night:
data_dump -i 1,2100 -H isfs_20130619_040000.dat.bz2 | more ... 2013 06 19 04:00:02.0428 0.04951 12 00 80 00 80 00 80 00 80 3f f0 55 aa 2013 06 19 04:00:02.0917 0.04896 12 00 80 00 80 00 80 00 80 3f f0 55 aa 2013 06 19 04:00:02.1417 0.04994 12 00 80 00 80 00 80 00 80 3f f0 55 aa 2013 06 19 04:00:02.1917 0.05003 12 00 80 00 80 00 80 00 80 3f f0 55 aa 2013 06 19 04:00:02.2418 0.05005 12 9f 02 0e 00 48 ff bc 19 c0 8f 55 aa 2013 06 19 04:00:02.2918 0.05002 12 a1 02 09 00 45 ff c2 19 c1 8f 55 aa 2013 06 19 04:00:02.3417 0.0499 12 a9 02 07 00 41 ff c6 19 c2 8f 55 aa 2013 06 19 04:00:02.3917 0.05003 12 9f 02 06 00 42 ff c9 19 c3 8f 55 aa 2013 06 19 04:00:02.4417 0.05004 12 9a 02 05 00 41 ff ca 19 c4 8f 55 aa
The "00 80" hex values are an obvious indication that it is not able to calculate winds.
The leading digit of the hex value before the "55 aa" are the sonic diagnostic bits 12 to 15, where a value of 0 indicates a good status. The value in hex will be the sum of the following hex values:
diagbit |
hex |
meaning |
|---|---|---|
12 |
1 |
low signal |
13 |
2 |
high signal |
14 |
4 |
no lock |
15 |
8 |
difference in speed of sound amongst paths |
Note that for sonics with a krypton, the diagbits will be three hex fields before the 55 aa.
In the above data, the diagbits are either "f" indicating all diag bits are set, or 8 indicating an excessive difference in the speed of sound measurements.
Looking at the wetness and precip plots, this likely is due to moisture on the transducers.
11:00 Pond wetness running again. Used another wisard board with I2C address 0x39. Had
to modify xml.
Cleaned domes while out there.
P.S. I recall that we had this replacement sensor shipped in from Boulder, hence the delay in getting it deployed.
8:15 - 9:15 There will be some tower climbing this morning. Ned is collecting data
with the LAI-2000 instrument. After that we will work on the 32m serial mote.
Weather: Cloudy, should burn off later today with no rain expected
Summary: Par, Tsfc, and wetness at 32m still down. Wetness at pond down. Sonic at 20m went out last night
at about 22:00. It came back to life around 7:00am this morning.
Sonics: ok, monitor 20m sonic
TRH, P: ok
Wind Speed & Dir: ok
Soil, Rainr: Tsoila & Tsoilb at 4.cm still bad, Qsoil.b intermittent through the night
Vmote (rad, a, a2, b): 11.9 to 12.4
Radiation, Wetness: wetness at pond still down, will install today
H2O, CO2: Krypton at 13.9m low signal through the night, coming in this morning
System (GPS, Vdsm): ok
Pond: ok except for wetness
16:00 The serial mote at 32m is down. based on data plots this occurred at about 11:00am.
DSM command eio did not bring it back to life. Due to present weather conditions we will hold off till tomorrow to investigate.
Just a light shower this time. Hope Steve and Jen are just about done with their Lidar work! Also a chance to see if the understory tipping bucket works again.
10:30 Upon inspection found the tipping bucket tube at soil.b was clogged with ill-defined organic matter.
Since the funnel was full, I tried to allow this water to be measured (post-rain), but only was able to get 2--3 tips to register. Also, this likely would have been an under-report since the funnel's capacity had been exceeded.
We have decided that checking for clogs should be a regular maintenance task.