~ 12:00    Dr. Oncley wanted a wetness sensor put down at the surface of the soil in a vertical position.
So we moved mote #2 Wetness to this new position, photo 1 & 2. Since 15 seems to flood all the time
so we should see some action on this probe.

One concern is the cable from the probe to the NR01 was short. Photo 3 shows
the cable going back to the NR01. The downlooking sensors may see it.

We left the marina around 11am while the tide was still going out.

We visited S15 and removed M3 (ID4), then took that tripod and the NR01 to S1 to install them.  I think the idea is that the radiation/soil sensors will be deployed along a line from the turbine to S15.

The radiation boom is aimed south, 175 cm from ground to center of NR01.  Steve buried the soil probes (T, Q, G).  S1 seemed like a much drier site than many others, perhaps because it's a 130m hike from the water.

We removed the solar panel and battery from the tripod since they are not needed, this mote is connected directly to port 7 on the DSM.  I verified that we saw data messages for all the sensors from mote, but I have not yet changed the NIDAS config.

We arrived back at the marina around 2:45.

For whatever it's worth, yesterday when we returned from S8, I measured the clearance between the bottom of the bridge and the motor.  As long as all the passengers can duck lower than the motor, the motor is the limiting factor for clearing the bridge.  The clearance was 16", and at the time the Lewes station tide level reported 2.26 ft above MLLW.  So I hope that gives a guide as to when the bridge is passable or not.  For example, if the Lewes station is measuring 3.25 ft above MLLW, something that is updated every 6 minutes and can be checked from a smart phone while out on the marsh, then that would leave 4 inches of clearance under the bridge.  I'm not suggesting what a safe clearance should be, only wondering if this can help with planning.

Kurt's guidance is to look for the "step" in the bridge foundation at either side of the bridge: If it's visible then there is enough clearance.  That has been a good rule of thumb for us that we have followed.  However, maybe there's still enough clearance even when the step is not quite visible, meaning we could save ourselves the 30 minutes coming back the long way.

9/12/16

Summary: Light winds,  5 m/s, out of the NE, clear,
                 EC150, at site #15, was down for a period yesterday (refer to blog for more information) 

Actions past 24 hours:

•  installed Gill 2D at site 8
• EC150 was down for short period, Oncley got it back up

To dos:

•  move rad/soil Mote #1 to another site, #1 or #9

Sensor Status: 

T/RH:  ok
P: ok
2D Gill: ok
csat u,v:  ok
csat ldiag: ok
csat w, tc: ok
EC150: ok, was down for a period of time yesterday (~11:00 am to ~10:00:pm)
motes: ok
Wetness: ok
radiation: ok
Tsoil: ok
Gsoil: ok
Qsoil: dk
Cvsoil: not responding
Vbatt: ok

This morning, S15's EC150 stopped reporting.  It appears to be associated with a ddn/dup at 1451 UTC.  (There are several data files around this time.  Data are in the file starting 1438 and not in the file starting 1451.) I've just tried eio 5 0/1 and failed to revive it.  It also doesn't respond to <cr> to get a prompt.  However, the station's Iload was constant during this period (and similar to the day before), which makes you think that the sensor is still trying to function.

FIXED: Somehow emode on 5 was back to 232 (even though it <should> have been set by the script pre_dsm.sh).  I just manually entered: emode 5 422 and data started flowing.

Gary and I did a quick trip to 8 to re-install the Gill sonic.
Everything went as planned including doing the short boat trip both ways.

9/11/16

Summary: Light winds, < 5 m/s, out of the W, partly cloudy.

Actions past 24 hours:

• Spent time at station 8 trying to fix Gill 2D (refer to blog post)

To dos:

•  may go to S8 to install Gill
•  work on spare power/monitor parts

Sensor Status: 
UPDATE: Gary got Mote #2 running again. 

T/RH:  ok
P: ok
2D Gill: ok, down at S8
csat u,v:  ok
csat ldiag: ok
csat w, tc: ok
EC150: ok
motes: Mote #2 down since yesterday (no soil at #1 and #3)
Wetness: down
radiation: ok, except Mote #2
Tsoil: down
Gsoil: down
Qsoil: down
Cvsoil: not responding
Vbatt: ok, battery at site 15 getting low at night, will monitor

Just looking at typical midday values:

Rsum = 500 W/m2

H = 100 W/m2

LE = 200 W/m2

G = 50 W/m2

Thus, there is an imbalance of 250 W/m2 (which is bigger than any of the measured terms).  The above values are before WPL corrections, etc., but I would be surprised if the corrections could double these terms.  The logical conclusion is that energy advection by the surface water is huge.   I'll try to see if this explanation is validated by the tidal cycle.

P.S. It could be useful to have a dat() function of the tide level...

P.P.S. I'll repeat the suggestion to mount a Wetness sensor close to the surface to detect water. 

For my own reference, to first order Pirga is low with a constant offset of 0.97mb, though lsfit() finds that this is really a larger offset combined with a 1% lower slope:

lsfit(dat("P"),dat("Pirga"))$coef

Intercept         P 

 7.9621428 0.9911725

I filled the boat gas tank yesterday with mid-grade gasoline.

We left earlier this morning than usual, around 8:30 am local, to head into the marsh.  Low tide was just before 9:00 am at 1.25 ft above MLLW, so we had no trouble getting under the bridge.

S8

We visited S8 first to replace the charge control monitor board.  Steve had mounted the new solar controller and new monitor CPU card he received in yesterday's shipment on an existing board, and that board went into S8.  That restored the power monitor messages to the DSM.  The readings at the time were 13.3V, .7A load current, 2.7A charge current.

• Still need to update the config on S8 to correct the sample processing for the power monitor messages. Gary Granger

After powering back up, the Gill sonic was not coming in.  It looks like that was related to port ttyS6 not getting set to 422 mode, and restart of dsm fixed it.

• Even after updating packages, the Gill did not come back after a reboot, and this time it did not come back after a dsm restart nor a power cycle using 'tio 4'.  There is no response from it using rserial to /dev/ttyS4.  The Gill appears to be down indefinitely.  We can replace it with a spare. Gary Granger

We then realized we forgot to bring the updated PIC processor card for the TP01, also received in yesterday's shipment, so we boated back to the marina so Steve could get it.

S15

At S15, Steve replaced the TP01 PIC processor card on ID2 (m2).  We mounted the repaired NR01 and the original mote ID1 (m1), and verified that radiation and power messages came in from that mote.  (It took a little while to realize I had left rfcomm bound to that radio when we removed it, so I had to release it to allow the DSM to connect.)  The ID2 mote took longer to verify the TP01.  We had to try several power cycles, and Steve tried pressing the I2C rescan button also.  I connected directly over bluetooth and we tried to look at the output from the mote on boot up and after a rescan.  Finally we started seeing all the messages we expected: NR01, Tsoil, Qsoil, Gsoil, TP01, and power.

Steve unplugged and replugged the soil heat flux plate, and that got it reporting "better numbers".  He's not sure what good numbers would be for saturated marsh mud.

S4

Installed the tipping bucket rain gauge at 105 cm high on port ttyS6, 9600 8n1.  I added to the dsm config and verified the dsm was recording the raw messages, and we simulated some tips also.

• Fill out the rest of the tipping bucket config to process samples. Gary Granger

By the time we were done the tide was too high to fit under the bridge, so we had to return the long way on Old Mill Creek.   We returned to the marina around 2:00, pulled the boat out and sprayed it down.  The marina seems a little busier now that school is in session.  We had to wait for people parked on the ramp both when we launched and when we pulled it.

  The signal line from the SWin sensor to the PIC was cut. During assemble the wire was
pinched and eventually broke.

Site 11:  TRH26 was replaced with TRH29
Site 5:    The TRH shield was replaced due to flaky Ifan values 

Results: Both sites looking good