- 3: RAD , Site none, Fri 31-Jan-1992 15:47:03 GMT, RADIATION CALIBRATIONS:
RADIATION CALIBRATIONS:
Below is a table of the radiation farm sensors
and their calibrations, channel assignments, etc.
CALIBRATIONS:
sensor S/N calibration
net rad 91096 12.8 (Wm2)/mV
pyg.in 27907 3.44 (uV)/Wm2
pyg.out 26416 3.59 (uV)/Wm2
psp.in 26214 8.70 (uV)/Wm2
psp.out 26226 8.74 (uV)/Wm2
G1.8cm 87028 (1 band) 42.5 (Wm2)/mV
G2.8cm 87034 (2 band) 38.0 (Wm2)/mV
G3.8cm 87036 (3 band) 38.2 (Wm2)/mV
pyg.in.dome 27907 A0 = 3.52223E-03
A1 = 2.97219E-04
A2 = -3.48869E-06
A3 = 1.88621E-06
V = 5.35
pyg.in.case 27907 A0 = 3.54439E-03
A1 = 2.84993E-04
A2 = 3.26577E-06
A3 = 1.92157E-07
V = 5.15
pyg.out.dome 26416 A0 = 3.51056E-03
A1 = 3.05338E-04
A2 = -7.21945E-06
A3 = 3.01329E-06
V = 5.40
pyg.out.case 26416 A0 = 3.52785E-03
A1 = 2.95854E-04
A2 = -1.75056E-06
A3 = 1.54478E-06
V = 5.25
t.surface xxxx -----
T1.soil 0001 A0 = 3.54119E-03
A1 = 2.97005E-04
A2 = 1.80614E-06
A3 = 1.15568E-06
V = 5.20
T2.soil 0002 A0 = 3.56373E-03
A1 = 2.85184E-04
A2 = 7.67683E-06
A3 = -4.74896E-07
V = 5.00
T3.soil 0003 A0 = 3.55908E-03
A1 = 2.86115E-04
A2 = 6.34399E-06
A3 = -8.76928E-08
V = 5.00
( T soil calibration parameters are means for the
multiplex signals. If each individual calibration
is require get in touch with Steve Semmer.)
ADAM ASSIGNMENTS:
ADAM: ragwort
parameter channel gain/offset cal. factor,offset
pyg.in 100 200/- 0.22179142,0.0
pyg.out 101 200/- -0.021252437,0.0
psp.in 102 200/- 0.087696839,0.0
psp.out 103 200/- -0.087295481,0.0
pyg.in.dome 104 2/-5 A0 thru V above
pyg.in.case 105 2/-5 A0 thru V above
pyg.out.dome 106 2/-5 A0 thru V above
pyg.out.case 107 2/-5 A0 thru V above
net.rad 108 100/- 0.01953184,0.0
t.surface 109 2/-5 0.001525925,25.0
G1.8cm 110 200/- 0.032425906,0.0
G2.8cm 111 200/- 0.028992575,0.0
G3.8cm 112 200/- 0.029145168,0.0
T1.soil 116 2/-5 A0 thru V above
T1.index 117 1/- ----
T2.soil 118 2/-5 A0 thru V above
T2.index 119 1/- ----
T3.soil 120 2/-5 A0 thru V above
T3.index 121 1/- ----
( V parameter on Thermistor measurements are multiplied by
1000 when entered as calibration factors.)
- 42: RAD , Site none, Wed 05-Feb-1992 22:48:10 GMT, PYG.OUT.CASE TEMPERATURE:
PYG.OUT.CASE TEMPERATURE:
The data for pyg.out.case looks
bad. It is bouncing around which is a sign
of a bad differential amplifier or switching
chip. It will be investigated.
- 43: RAD , Site none, Wed 05-Feb-1992 23:30:53 GMT, PYG.OUT.CASE FIX:
PYG.OUT.CASE FIX:
The filter stage was bad.
It was replaced at about 23:00 GMT.
- 49: RAD , Site none, Thu 06-Feb-1992 22:07:25 GMT, RAIN GAUGE CALIBRATION:
RAIN GAUGE CALIBRATION:
I made some mods to the
optical rain gauge calibration routines.
covar on cosmos will be restarted.
Time is 22:08 GMT.
- 67: RAD , Site none, Sun 09-Feb-1992 19:12:55 GMT, SOIL SAMPLES: These samples were weighe
SOIL SAMPLES: These samples were weighed without taring an empty Al dish.
Hence all net and dry weights should be reduced 1.5 g.
DATE TAKEN WET WEIGHT DRY WEIGHT DIFFERENCE GRAVMOISTURE
(JULIAN) (GRAMS) (GRAMS) (GRAMS) (PERCENT)
_______________________________________________________________________________
34 32.87 26.05 6.82 26.2
31.24 24.73 6.51 26.3 = 26.3
34.85 27.59 7.26 26.3
36 29.15 23.38 5.77 24.7
31.53 25.13 6.40 25.5 = 25.1
30.63 24.47 6.16 25.2
38 34.38 28.05 6.33 22.6
33.47 27.68 5.19 18.8 = 19.8
33.37 28.28 5.09 18.0
40 32.68 26.17 6.51 24.9
32.62 26.02 6.60 25.4 = 25.3
32.20 25.65 6.55 25.5
42 33.19 spilled - -
32.56 26.57 5.99 22.5 = 22.8
31.30 25.44 5.86 23.0
45 30.43 23.25 7.18 30.9
28.27 21.56 6.71 31.1 = 30.9
28.39 21.72 6.67 30.7
46 33.58 25.95 7.63 29.4
33.18 25.64 7.54 29.4 = 29.2
28.74 22.32 6.42 28.8
47 29.35 22.44 6.91 30.8
30.39 23.14 7.25 31.3 = 31.1
31.30 23.85 7.45 31.2
48 37.94 28.88 9.06 31.4
40.62 30.89 9.73 31.5 = 31.5
41.55 31.60 9.95 31.5
49 31.21 23.68 7.53 31.8
36.89 28.02 8.87 31.7 = 31.6
31.24 23.78 7.46 31.4
51 Thurs 29.21 22.55 (22.52)
34.55 26.67 (22.67)
30.85 23.65 (23.66)
cooked 1 day 2days
52 Fri 30.73 23.76
29.50 22.91
27.48 21.43
54 Sun
- 136: RAD , Site none, Wed 26-Feb-1992 17:34:50 GMT, Removed signal filters from Tsoil indic
Brought down ragwort at approx 16:55 Z, day 57, to remove filters
for T1.index, T2.index and T3.index, from amplifier-filter board.
These are channels 117,119 and 121 on ragwort. The filters were
causing ringing at the index steps.
The ASTER filter pcb's for these channels were in the leftmost
amplifier-filter board (the same one with the internal temp),
in slots U63, U43, and U23. These ASTER filters were removed
and a jumper wire inserted to connect pins 2 and 4.
-----------------
I ASTER filter I
I I
I I
I I
I I
I I
I I
I I
I 6 5 I
I 4 3 I Jumper inserted between holes 2 & 4.
I 2 1 I
-----------------
Brought ragwort back up by 17:11
Index channels look fine, with no ringing.
- 138: RAD , Site none, Wed 26-Feb-1992 20:03:49 GMT, RELEVELING OF RADIATION SENSORS.
RELEVELING OF RADIATION SENSORS.
At 1340-1350 26 Feb (1940-1950Z) the radiarion stand and the net
radiometer were releveled.
The radiation stand was approximately 1 degree tilted in an E-W
direction.( ie one end of the darkhorse had settled).
The net radiometer was a quarter bubble over the line.
:wq
- 143: RAD , Site none, Thu 27-Feb-1992 22:54:06 GMT, ATTEMPTS TO CURE THE NOISE PROBLEMS OF
ATTEMPTS TO CURE THE NOISE PROBLEMS OF pyg.out.case.
This morning a problem became apparent with the pyg.out.cas
The following solutions were attempted sequentially between 1300-1640 cst
(1900-2240Z) but without sucess.
The filter board was replaced.
The two chips on the signal conditioning board were replaced
The darkhorse patch box was checked.
The 12m 4channel analoge cable was substituted (and then replace back
again)
A 2.000 volt potential was fed into the darkhorse strip in lieu of the
pyg.out.case signal.
None of these measures had any effect and so the situation persists.
- 148: RAD , Site none, Sun 01-Mar-1992 00:32:18 GMT, PYG.OUT.CASE T:
PYG.OUT.CASE T:
Signal output of case temperature looked
good going into the ADAM unit. Switched the filter
board and switching chip of channel 106 with 107.
Signals on both channels look ok.
- 151: RAD , Site none, Sun 01-Mar-1992 21:08:18 GMT, De-multiplexed soil temperatures
Installed a new version of covar on ASTER which de-multiplexes
the soil temperatures. The new dids are:
Location temperature probes index index channel
Ridge 1cm.Tsoil.rid 0 index.Tsoil.rid
3cm.Tsoil.rid 1
5cm.Tsoil.rid 2
7cm.Tsoil.rid 3
Furrow 1cm.Tsoil.fur 1 index.Tsoil.fur <- see below
3cm.Tsoil.fur 0
5cm.Tsoil.fur 2
7cm.Tsoil.fur 3
Intermediate 1cm.Tsoil.int 0 index.Tsoil.int
between ridge 3cm.Tsoil.int 1
and furrow 5cm.Tsoil.int 2
7cm.Tsoil.int 3
covar_ragwort was restarted at 1600Z with these temperatures
added in the covariance groups.
After viewing plots of the diurnal cycle, we decided that
the indices for 1cm.Tsoil.fur and 3cm.Tsoil.fur were switched.
The calibration parameters then were updated from those used
for SJAVQS91, to those determined in the calibration lab
on Jan 13, 1992.
covar_ragwort was then restarted at 21:10Z with the new
calibration parameters and the 1cm and 3cm furrow channel
switched.
- 209: RAD , Site none, Sat 14-Mar-1992 16:40:04 GMT, RAIN GAUGE DISCONNECTED:
RAIN GAUGE DISCONNECTED:
The optical rain gauges have been
removed from the network.
- 219: RAD , Site none, Sun 15-Mar-1992 21:29:18 GMT, SOIL TEMP PROBE ORDER:
SOIL TEMP PROBE ORDER:
The soil temperature probes were
in the correct order for all 3 units.
For the intermediate unit, #2, the 5cm
and 7cm probes were very close to each other.
Below is the order of the probes:
probe level index
0 band 1cm 0.0 volts
1 band 3cm 1.6 volts
2 band 5cm 3.4 volts
3 band 7cm 5.0 volts
- 227: RAD , Site none, Mon 17-Aug-1992 15:55:06 GMT, Post calibration of Tsoil probes:
Post calibration of Tsoil probes:
I had Allen do a calibration run on the Tsoil units
after he repaired the boards. Results of the tests can
be gotten from Steve Semmer.
The test consisted of placing the probes in an
aluminum block with the temperature reference device.
The electronics were also in the chamber at the time of the test.
A soak time of 1 hour was used at each temperature.
The first sensor looked pretty good.
There was a definite change in slope with respect to the temperature.
This may have been due to the electronics response to temperature
changes. Calibrations before StormFest and FootPrint did not allow
for the electronics to be subjected to changes.
All four probes followed each other.
The other two sensors did not fair as well.
There was a slope change; however, the tracking between sensors
was not that good. I will have Allen do another 3 point check
on this units.
The table below specs the worst error of each probe in the
range of -10C to 20C (STORMFEST). The table also has the error
band if a simple linear fit were applied over the specified
temperature range. The error information is computed using the
pre-calibration coefficients with the post-calibration voltage
outputs.
The question to answer is do we want to apply a correction to
the STORMFEST data. The components changed on the circuit
boards should not have had a major impact on the sensor output
since the impedence of the mux swithes are low compared to
the thermistor values.
sensor mean error (C) linear fit error (C)
TS - REF TS - REF
TS1-1cm -.5 to -.2 -.02 to .02
TS1-3cm -.5 to -.2 -.02 to .01
TS1-5cm -.4 to -.1 -.01 to .01
TS1-7cm -.7 to -.2 -.02 to .02
TS2-1cm -.5 to .1 -.04 to .06
TS2-3cm -.3 to .1 -.02 to .03
TS2-5cm -.3 to .1 -.03 to .05
TS2-7cm -.9 to -.1 -.02 to .03
TS3-1cm -.1 to .0 -.01 to .01
TS3-3cm -.3 to -.1 -.01 to .01
TS3-5cm -.6 to -.1 -.01 to .01
TS3-7cm -.6 to -.1 -.03 to .02