FOOTPRINT92: Logbook Entries

FOOTPRINT92: RAD Messages: 21 Entries..

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Entry Date Title Site Author #Graphics
5 Wed 03-Jun-1992Radiation and soil sensor cabling confi noneOperator
7 Wed 03-Jun-1992GRAVIMETRIC SOIL MOISTURE noneOperator
11 Thu 04-Jun-1992T.soil.snd is broken: nonesrs
18 Fri 05-Jun-1992Burying the Sand T multi-plexer in the noneacd
38 Sun 07-Jun-1992Cloud of dust. noneacd
45 Sun 07-Jun-1992RADIATION TESTING: nonesrs
47 Sun 07-Jun-1992FIX TO RADIATION: nonesrs
51 Mon 08-Jun-1992CALIBRATION FACTORS FOR RADIATION AND S noneacd
81 Wed 10-Jun-1992Radiation sensor levels checked. noneacd
83 Wed 10-Jun-1992Darkhorse orientaion shot. noneacd
87 Thu 11-Jun-1992Pyg.out problem noneacd
89 Thu 11-Jun-1992PYG.OUT.CASE is ?: nonesrs
96 Fri 12-Jun-1992GRAVIMETRIC SOIL MOISTURE noneOperator
101 Sat 13-Jun-1992GRAVIMETRIC SOIL MOISTURE noneacd
121 Wed 17-Jun-1992Checked radiation sensor gains from nonetwh
124 Thu 18-Jun-1992Disconnected Pyg.out temperature leads nonetwh
134 Mon 22-Jun-1992Tsoil.sand multiplexing appears to have nonetwh
146 Wed 24-Jun-1992Removed the pyg.out pyrgeometer and che nonetwh
147 Wed 24-Jun-1992Tsoil.grass died around 2200 GMT on JD nonetwh
163 Fri 14-Aug-1992Post calibration of Tsoil probes nonesrs
165 Wed 03-Mar-1993Soil thermal conductivity correction noneacd


5: RAD , Site none, Wed 03-Jun-1992 17:12:12 GMT, Radiation and soil sensor cabling confi
Radiation and soil sensor cabling configuration. 
  
 The tall darkhorse was setup at the 250m station with the radiation 
 sensors. The soil heat and temperature sensors were installed nearbye. 
 Four analog mux cables, A, B, C, and D from the darkhorse break-out-box 
 and two analog mux cables, E and F, from another analog break-out-box 
 ran to cosmos. 
 
 The cabling from the break-out-boxes was as follows. 
 
 Left hand side of darkhorse break-out-box: 
 
 A    psp.out            psp.in               pyg.out             pyg.in    
	3                  2                    1                   0 
      cosmos:111         cosmos:110           cosmos:109          cosmos:108 
 
 B    pyg.in.dome        pyg.in.case          pyg.out.dome        pyg.in.case 
        4                  5                    6                   7 
      cosmos:112         cosmos:113           cosmos:114          cosmos:115 
 
 Right hand side of darkhorse break-out-box: 
 
 C    net.rad            T.surf               G1.bsh.8cm          G2.grs.8cm 
	0                  1                    2                   3 
      cosmos:116         cosmos:117           cosmos:118          cosmos:119 
 
 D    G3.snd.8cm           -                    -                   - 
	4                  5                    6                   7 
      cosmos:120 
 
 Stake mounted analog break-out-box: 
 
 E    Tsoil.bsh         index.Tsoil.bsh      Tsoil.grs           index.Tsoil.snd 
	0                  1                    2                   3 
      cosmos:124        cosmos:125           cosmos:126          cosmos:127 
 
 F    Tsoil.snd         index.Tsoil.snd         -                   - 
	4                  5                    6                   7 
      cosmos:128        cosmos:129 
 
 
The coupling into cosmos was as follows. 
 
 cosmos analog 0 =  t.250.10m1 + q_kh2o_2a + conc.sf6.250.10m + mode.sf6.250.10m 
 cosmos analog 1 =  bugflux data (query there are 5 bugflux channels) 
 cosmos analog 2 =  A 
 cosmos analog 3 =  B 
 cosmos analog 4 =  C 
 cosmos analog 5 =  D 
 cosmos analog 6 =  E 
 cosmos analog 7 =  F 
 
7: RAD , Site none, Wed 03-Jun-1992 19:04:39 GMT, GRAVIMETRIC SOIL MOISTURE
GRAVIMETRIC SOIL MOISTURE 
Number: 7             Written 06-JUN-92 by ACD                   
Type: RAD                     Project: FOOTPRINT92          
Title: GRAVIMETRIC SOIL MOISTURE 
--------------------------------------- 
Samples taken in the vicinity of the darkhorst. 
Samples taken in triplicate 
Samples weighed within an hour of collection to give WET WEIGHT 
Samples then dried in the oven at 110 deg C for 24 hours to give DRY WEIGHT 
Soil samples were weighed with taring of an empty Al dish. 
 
DATE TAKEN	WET WEIGHT	DRY WEIGHT   DIFFERENCE    GRAVMOISTURE 
 
 (JULIAN)	 (GRAMS)	 (GRAMS)      (GRAMS)        (PERCENT) 
_______________________________________________________________________________ 
 5 Jun 92 
  Friday 
   157 
             A   25.59          25.48         0.11           0.43 
     SAND    B   33.17          33.02         0.15           0.45   = 0.43% 
	     C   35.11          34.97         0.14           0.40 
 
             A   23.76          23.69         0.07           0.30 
     GRASS   B   23.75          23.67         0.08           0.34   = 0.30% 
	     C   19.58          19.53         0.05           0.26 
 
             A   22.59          22.46         0.13           0.58 
     BUSH    B   21.72          21.60         0.12           0.56   = 0.57%  
	     C   29.33          29.16         0.17           0.58 
 
 
 11 JUN92 
 THURSDAY 
 
 
             A 
     SAND    B 
	     C 
 
             A   
     GRASS   B    
	     C    
 
             A   
     BUSH    B   
	     C     
 
 
 
11: RAD , Site none, Thu 04-Jun-1992 02:18:37 GMT, T.soil.snd is broken:
T.soil.snd is broken: 
 
	the T.soil.sand goes on and off 
throughout the day. It may be a temperature 
problem. 
 
18: RAD , Site none, Fri 05-Jun-1992 00:11:40 GMT, Burying the Sand T multi-plexer in the
Burying the Sand T multi-plexer in the sand 
The index of Tsoil.snd suffered from malfunction leading 
to overlong timing intervals. 
To alleviate the temperature effect at 12:30 today the multiplexer was buried at 20 cm depth 
 
 
38: RAD , Site none, Sun 07-Jun-1992 01:24:36 GMT, Cloud of dust.
Cloud of dust. 
At approximately 17:00 pdt a large dust clouid  
swept across the site from the direction of the 
200E area 
 
45: RAD , Site none, Sun 07-Jun-1992 20:37:39 GMT, RADIATION TESTING:
RADIATION TESTING: 
 
	Tests took place between 20:00 and 
20:30z on the radiation channels. Therefore 
these data are questionable. 
 
 
47: RAD , Site none, Sun 07-Jun-1992 21:05:51 GMT, FIX TO RADIATION:
FIX TO RADIATION: 
 
	The gain settings on the 
psp.in, psp.out, pyg.in, pyg.out 
were set to 100 not 200. This has 
been corrected as of 5 minutes ago. 
This should be noted for post analysis 
work. 
 
51: RAD , Site none, Mon 08-Jun-1992 00:15:57 GMT, CALIBRATION FACTORS FOR RADIATION AND S
CALIBRATION FACTORS FOR RADIATION AND SOIL SENSORS 
--------------------------------------- 
 
 
NOTE this was copied from the SJVAQS logbook and needs to be edited. 
When it is satisfactorily edited this comment will be erase. 
 
Calibration factors for radiation and soil sensors 
(The tables shows the calibration factors available from the calibration 
 data, and allows an intercomparison with the prep.config factors used) 
A copy of /home/aster/projects/FOOTPRINT92/ops1/prep.config will be compared 
with these calibration factors. There will then be an affirmation check. 
 
 
CHECKED DOWN TO HERE 
 
 CHANNEL    SENSOR        S/N        CAL            calibration factors 
 
cosmos:100 pyg.in.rad   27907F3  3.44 uv/W m-2     linear cal  #######, ### 
                                                   gain =  ?       
 
                  Date of this calibration = ## ## ##  
 
                (prep.config:  Checked   ?   ) 
 
cosmos:101 pyg.out.rad  26416F3  3.59 uv/W m-2     linear cal   ######, ### 
                                                   gain =  ? 
 
                   Date of this calibration = ## ## ##  
 
                 (prep.config:  Checked   ?  ) 
 
cosmos:102 psp.in.rad   26214F3  8.70 uv/W m-2     linear cal    #####, ### 
                                                   gain =  ? 
                                Date of this calibration = ## ## ##  
 
                                (prep.config:  Checked 14 Nov 91      ) 
 
 103      psp.out.rad  26226F3  8.85 uv/W m-2     linear cal   8.6210E-2, 0.0 
                                gain=200 
                                Date of this calibration = ## ## ##  
 
                                (prep.config:  Checked 14 Nov 91      ) 
 
 108      r.net         90076   13.4 W m-2/mV     linear cal   2.0447E-2, 0.0 
                                gain=100 
                                Date of this calibration = ## ## ##  
 
                                (prep.config:    2.0294E-2 , 0.0      ) 
 
 109      t.surface     1041    100degree C/V     linear cal   1.5259E-3, 25 
                                offset=-25degree  
                                gain=10 
                                Date of this calibration = ## ## ##  
 
                                (prep.config:  Checked 14 Nov 91      ) 
 
 113      par.rad       Q9125    -143.47          linear cal   3.6246E-1, 0.0 
                                 umole/m-2 s/uA  
                                 gain=100 
                                 resistance=604ohm 
                                Date of this calibration = ## ## ##  
 
                                (prep.config:  Checked 14 Nov 91      ) 
 
 
 CHANNEL  SENSOR       CAL                        prep.config factor used 
 
 104      pyg.in.dome  A0 = 3.5754E-3             c=thermistor  3.5754E-3     
                       A1 = 2.6846E-4                           2.6847E-4 
                       A2 = 6.1043E-6                           6.1043E-6 
                       A3 =-3.6998E-6                           3.6998E-6 
                   offset = 4.8 
                   Date of this calibration = ## ## ##  
 
 105      pyg.in.case  A0 = 3.5764E-3             c=thermistor All OK 14nov91     
                       A1 = 2.6860E-4                                        
                       A2 = 6.3499E-6                                       
                       A3 =-3.6393E-6                                      
                   offset = 4.8 
                   Date of this calibration = ## ## ##  
 
 106      pyg.out.dome A0 = 3.5829E-3             c=thermistor All OK 14nov91     
                       A1 = 2.8073E-4                                        
                       A2 = 1.7521E-5                                       
                       A3 =-9.3759E-7                                      
                   offset = 4.8 
                   Date of this calibration = ## ## ##  
 
 107      pyg.out.case A0 = 3.5850E-3             c=thermistor All OK 14nov91   
                       A1 = 2.8512E-4                                       
                       A2 = 2.1575E-5                                       
                       A3 = 1.2726E-7                                      
                   offset = 4.8 
                   Date of this calibration = ## ## ##  
 
 CHANNEL  SENSOR                     CAL             cal factors 
 
 117     Tsoil.a.index            linear cal         1.5259E-4 ,0.0 
                                  offset =  
                                  gain= 
                                  Date of this calibration = ## ## ##  
 
                                (prep.config:  Checked       ) 
 
 118     Tsoil.b.index            linear cal         1.5259E-4 ,0.0 
                                  offset =  
                                  gain= 
                                  Date of this calibration = ## ## ##  
 
                                (prep.config:  Checked       ) 
 
 
 119     Tsoil.c.index            linear cal         1.5259E-4 ,0.0 
                                  offset =  
                                  gain= 
                                  Date of this calibration = ## ## ##  
 
                                (prep.config:  Checked       ) 
 
 CHANNEL  SENSOR       CAL                        prep.config factor used 
 
 116      Tsoil.a       (mean)                    c=thermistor All OK 19 Nov91   
                          A0 = 3.5869E-3 
                          A1 = 2.6991E-4 
                          A2 = 9.3435E-6 
                          A3 =-3.5796E-6 
                          offset = 4.7 
 
          Tsoil.a.1cm   (0band)                  
                          A0 = 3.5920E-3 
                          A1 = 2.6757E-4  
                          A2 = 1.0719E-5 
                          A3 =-3.6759E-6 
                         offset = 4.7 
 
          Tsoil.a.3cm   (1band)                  
                          A0 = 3.5932E-3 
                          A1 = 2.6837E-4 
                          A2 = 1.0903E-5 
                          A3 =-3.6485E-6 
                          offset = 4.7 
 
          Tsoil.a.5cm   (2band)                 
                          A0 = 3.5931E-3 
                          A1 = 2.6774E-4 
                          A2 = 1.0867E-5 
                          A3 =-3.6422E-6 
                          offset = 4.7 
 
          Tsoil.a.7cm   (3band)                 
                          A0 = 3.5925E-3 
                          A1 = 2.6795E-4 
                          A2 = 1.1015E-5 
                          A3 =-3.6040E-6 
                          offset = 4.7 
                   Date of this calibration = 30 May 91 
 
 118      Tsoil.b       (mean)                    c=thermistor All OK 19 Nov91   
                          A0 = 3.5495E-3 
                          A1 = 2.8734E-4 
                          A2 = 4.3827E-6 
                          A3 = 6.5799E-7 
                          offset = 5.0 
 
          Tsoil.b.1cm   (0band)          
                          A0 = 3.5490E-3 
                          A1 = 2.8731E-4 
                          A2 = 4.2973E-6 
                          A3 = 6.3137E-7 
                         offset = 5.0 
 
          Tsoil.b.3cm   (1band)           
                          A0 = 3.5509E-3 
                          A1 = 2.8736E-4 
                          A2 = 4.3523E-6 
                          A3 = 6.6114E-6 
                          offset = 5.0 
 
          Tsoil.b.5cm   (2band)               
                          A0 = 3.5496E-3 
                          A1 = 2.8727E-4 
                          A2 = 4.2113E-6 
                          A3 = 5.9975E-7 
                          offset = 5.0 
 
          Tsoil.b.7cm   (3band)                 
                          A0 = 3.5487E-3 
                          A1 = 2.8718E-4 
                          A2 = 4.4353E-6 
                          A3 = 6.8631E-7 
                          offset = 5.0  
                   Date of this calibration = 30 May 91  
 
 120      Tsoil.c       (mean)                    c=thermistor All OK 19Nov91   
                          A0 = 3.5287E-3 
                          A1 = 2.9799E-4 
                          A2 = 3.7889E-7 
                          A3 = 4.7208E-6 
                         offset = 5.25 
 
          Tsoil.c.1cm   (0band)                  
                          A0 = 3.5267E-3  
                          A1 = 2.9787E-4 
                          A2 = 3.0097E-7 
                          A3 = 4.6895E-6 
                         offset = 5.25 
 
          Tsoil.c.3cm   (1band)                  
                          A0 = 3.5290E-3 
                          A1 = 2.9797E-4 
                          A2 = 3.0577E-7 
                          A3 = 4.6887E-6 
                          offset = 5.25 
 
          Tsoil.c.5cm   (2band)                  
                          A0 = 3.5297E-3  
                          A1 = 2.9813E-4 
                          A2 = 3.2779E-7 
                          A3 = 4.6919E-6 
                          offset = 5.25 
 
          Tsoil.c.7cm   (3band)                 
                          A0 = 3.5285E-3 
                          A1 = 2.9794E-4 
                          A2 = 4.7164E-7 
                          A3 = 4.7596E-6 
                          offset = 5.25 
                   Date of this calibration = 30 May 91 
 
 CHANNEL  SENSOR    S/N           CAL             cal factors 
 
 
 CHANNEL  SENSOR    S/N           CAL             cal factors 
 
 
 CHANNEL  SENSOR    S/N           CAL             cal factors 
 
 110      G1.8cm    blue#band     42.6 W m-2/mV   linear cal   3.2502E-2, 0.0 
                                  gain=200 
                                  Date of this calibration = ## ## ##  
 
                                (prep.config:  Checked 14 Nov 91      ) 
 
 111      G2.8cm    red#band      38.4 W m-2/mV   linear cal   2.9298E-2, 0.0 
                                  gain=200 
                                  Date of this calibration = ## ## ##  
 
                                (prep.config:  Checked 14 Nov 91      ) 
 
 112      G3.8cm    yellow#band   38.4 W m-2/mV   linear cal   2.9298E-2, 0.0 
                                  gain=200 
                                  Date of this calibration = ## ## ##  
 
                                (prep.config:  Checked 14 Nov 91      ) 
 
 
Note added 3 Mar 93 by ACD: 
	  The calibration values given here in the logbook for the soil 
	  heat flux plates are those derived from the Apr87 calibration. 
	  The Dec91 values are : 
 110      G1.8cm    blue#band   Serial number 87028  42.5 W m-2/mV    
 111      G2.8cm    red#band    Serial number 87034  38.0 W m-2/mV   
 112      G3.8cm    yellow#band Serial number 87036  38.2 W m-2/mV  
 
The correct values were used in the actual calculations during FOOTPRINT92. 
 
See also the additional logbook entry commenting on the correctiondue to  
the difference of thermal conductivity of the soil, the  heat flux plate, 
and the medium in which the heat flux plate was calibrated. 
 
81: RAD , Site none, Wed 10-Jun-1992 17:44:43 GMT, Radiation sensor levels checked.
Radiation sensor levels checked. 
 
There is an obvious difference between net.rad and sum.rad. 
To assertain that it was not a leveling problem 
I rechecked the level of Arnold ( oK to within 0.2 degrees both ways) 
and the net radiometer ( bubble well inside circle. 
 
83: RAD , Site none, Wed 10-Jun-1992 20:52:36 GMT, Darkhorse orientaion shot.
Darkhorse orientaion shot. 
Using the theodolite and the ephemeris the alignment of the 
darkhorse rail was 260 deg 48'. 
The was difficulty in defining an appropriate edge to shoot. 
In future a set of sighting wands attached to each end of the rail 
needs to be employed. 
 
87: RAD , Site none, Thu 11-Jun-1992 16:54:44 GMT, Pyg.out problem
Pyg.out problem 
 
The pyg.out (and maybe also occasionally the pyg.in) show bad tcase 
temperatures. This may be similar to the problem exibited during 
STORMFEST.  
 
 
89: RAD , Site none, Thu 11-Jun-1992 20:40:47 GMT, PYG.OUT.CASE is ?:
PYG.OUT.CASE is ?: 
 
	Tony has looked at the radiation 
data and believes the pyg.out.case temperature 
is in error. Upon examination of the signal 
I would agree. The voltage output is too low. 
The problem can't be fixed in the field. 
With a post calibration of the termistors the 
data can be corrected. 
 
96: RAD , Site none, Fri 12-Jun-1992 22:21:41 GMT, GRAVIMETRIC SOIL MOISTURE
GRAVIMETRIC SOIL MOISTURE 
Derived from         Number: 7             Written 06-JUN-92 by ACD  
Type: RAD                     Project: FOOTPRINT92          
Title: GRAVIMETRIC SOIL MOISTURE 
--------------------------------------- 
Samples taken in the vicinity of the base 
Samples taken in triplicate 
Samples weighed within an hour of collection to give WET WEIGHT 
Samples then dried in the oven at 110 deg C for 24 hours to give DRY WEIGHT 
Soil samples were weighed with taring of an empty Al dish. 
 
DATE TAKEN	WET WEIGHT	DRY WEIGHT   DIFFERENCE    GRAVMOISTURE 
 
 (JULIAN)	 (GRAMS)	 (GRAMS)      (GRAMS)        (PERCENT) 
_______________________________________________________________________________ 
 5 Jun 92 
  Friday 
   157 
             A   25.59          25.48         0.11           0.43 
     SAND    B   33.17          33.02         0.15           0.45   = 0.43% 
	     C   35.11          34.97         0.14           0.40 
 
             A   23.76          23.69         0.07           0.30 
     GRASS   B   23.75          23.67         0.08           0.34   = 0.30% 
	     C   19.58          19.53         0.05           0.26 
 
             A   22.59          22.46         0.13           0.58 
     BUSH    B   21.72          21.60         0.12           0.56   = 0.57%  
	     C   29.33          29.16         0.17           0.58 
 
 11 JUN92 
 THURSDAY 
 
             A   34.38          34.14         0.24           0.70 
     SAND    B   34.10          33.84         0.26           0.77   = 0.74 
	     C   39.50          39.21         0.29           0.74 
 
             A   29.03          28.83         0.20           0.69 
     GRASS   B   29.67          29.46         0.21           0.71   = 0.70 
	     C   33.06          32.92         0.14           0.42 ignored 
 
             A   24.02          23.79         0.23           0.97 
     BUSH    B   25.06          24.81         0.25           1.01   = 0.96 
	     C   24.44          24.22         0.22           0.91     
 
 
RAINFALL 
 12 JUN92 
 FRIDAY 
 
 
             A   27.40      
     SAND    B   31.35 
	     C   26.16 
 
             A   24.19 
     GRASS   B   26.95 
	     C   26.22 
 
             A   28.36 
     BUSH    B   27.23 
	     C   26.68 
 
 
 
 
101: RAD , Site none, Sat 13-Jun-1992 18:54:27 GMT, GRAVIMETRIC SOIL MOISTURE
GRAVIMETRIC SOIL MOISTURE 
Derived from         Number: 7             Written 06-JUN-92 by ACD  
Type: RAD                     Project: FOOTPRINT92          
Title: GRAVIMETRIC SOIL MOISTURE 
--------------------------------------- 
Samples taken in the vicinity of the base 
Samples taken in triplicate 
Samples weighed within an hour of collection to give WET WEIGHT 
Samples then dried in the oven at 110 deg C for 24 hours to give DRY WEIGHT 
Soil samples were weighed with taring of an empty Al dish. 
 
DATE TAKEN	WET WEIGHT	DRY WEIGHT   DIFFERENCE    GRAVMOISTURE 
 
 (JULIAN)	 (GRAMS)	 (GRAMS)      (GRAMS)        (PERCENT) 
_______________________________________________________________________________ 
 5 Jun 92 
  Friday 
   157 
             A   25.59          25.48         0.11           0.43 
     SAND    B   33.17          33.02         0.15           0.45   = 0.43% 
	     C   35.11          34.97         0.14           0.40 
 
             A   23.76          23.69         0.07           0.30 
     GRASS   B   23.75          23.67         0.08           0.34   = 0.30% 
	     C   19.58          19.53         0.05           0.26 
 
             A   22.59          22.46         0.13           0.58 
     BUSH    B   21.72          21.60         0.12           0.56   = 0.57%  
	     C   29.33          29.16         0.17           0.58 
 
 11 JUN92 
 THURSDAY 
 
             A   34.38          34.14         0.24           0.70 
     SAND    B   34.10          33.84         0.26           0.77   = 0.74 
	     C   39.50          39.21         0.29           0.74 
 
             A   29.03          28.83         0.20           0.69 
     GRASS   B   29.67          29.46         0.21           0.71   = 0.70 
	     C   33.06          32.92         0.14           0.42 ignored 
 
             A   24.02          23.79         0.23           0.97 
     BUSH    B   25.06          24.81         0.25           1.01   = 0.96 
	     C   24.44          24.22         0.22           0.91     
 
 
RAINFALL 
 12 JUN92 
 FRIDAY 
 
 
             A   27.40          24.75         2.65           10.7 
     SAND    B   31.35          28.36         2.99           10.5   = 10.6 
	     C   26.16          23.66         2.50           10.6 
 
             A   24.19          22.06         2.13           9.66 
     GRASS   B   26.95          24.60         2.35           9.55   = 9.59 
	     C   26.22          23.93         2.29           9.57 
 
             A   28.36          26.56 
     BUSH    B   27.23          25.40 
	     C   26.68          24.88 
 
 
 13 JUN92 
 SATURDAY 
 
 
             A   20.59          19.20 
     SAND    B   23.57          21.96 
	     C   19.60          18.27 
 
             A   22.10          20.29 
     GRASS   B   21.20          19.44 
	     C   20.02          18.38 
 
             A   24.14          22.99 
     BUSH    B   29.53          28.10 
	     C   24.46          23.29 
 
 14 JUN92 
 SUNDAY 
 
 
             A  25.17		23.36 
     SAND    B  24.33 		22.65 
	     C  22.03		20.46 
 
             A  25.66		23.65 
     GRASS   B  23.30		21.44 
	     C  22.09 		21.18 
 
             A  28.02		26.83 
     BUSH    B  25.50		24.30 
	     C  23.59		22.45 
 
 15 JUN92 
 Monday 
 
             A	24.73		23.39 
     SAND    B	25.54		24.08 
	     C	26.35		24.84 
 
             A	26.84		25.38 
     GRASS   B	26.00		24.64 
	     C	26.32		24.80 
 
             A	28.51		26.62 
     BUSH    B	23.30		21.64 
	     C	24.69		22.95 
 
 16 JUN92 
 Tuesday 
 
             A	31.04 
     SAND    B	29.80 
	     C	34.27 
 
             A	24.49 
     GRASS   B	24.33 
	     C	25.95 
 
             A	33.38 
     BUSH    B	29.88 
	     C	35.71 
 
 
 17 JUN92 
 Wednesday 
 
 
             A 
     SAND    B 
	     C 
 
             A 
     GRASS   B 
	     C 
 
             A 
     BUSH    B 
	     C 
 
 
121: RAD , Site none, Wed 17-Jun-1992 19:08:23 GMT, Checked radiation sensor gains from
Checked radiation sensor gains from 
10:45 am PDT to 11:45 am by putting 
a ladder at the west end of the sawhorse, 
measuring the sensor output at the 
black box, and looking at the aster 
output on ashow.  The gains for the 
psp's and pyg's were calculated to be 
200 and that for the net radiometer was 
100: 
 
sensor	output	chnl	counts	gain 
------------------------------------ 
psp.in	7.4 mV	110 	9755	200 
psp.out	1.0 mV	111	1388	200 
pyg.in	1.2 mV	108	1542	200 
pyg.out	2.7 mV	109	3620	200 
net    42.2 mV	116    27500	100 
 
By comparing to the calibration functions 
and the factory calibration, these appear 
to be the proper gains. 
 
The maximum incoming solar radiation measured 
at 622R today was 1.32 cal/cm^2/min = 921 W/m^2. 
This is close to the ASTER psp.in max of  
936.5 W/m^2. 
 
 
124: RAD , Site none, Thu 18-Jun-1992 18:40:48 GMT, Disconnected Pyg.out temperature leads
Disconnected Pyg.out temperature leads 
(12 V, Tdome, Tcase) at the black box 
on the end of the sawhorse.  From the 
voltmeter, this did not appear to  
change the pyg.out reading.  The rad.soil 
S plot also indicates no change in pyg.out. 
I was on the ladder at the sawhorse from  
11:10 to 11:20 am PDT. 
 
 
134: RAD , Site none, Mon 22-Jun-1992 18:40:19 GMT, Tsoil.sand multiplexing appears to have
Tsoil.sand multiplexing appears to have 
begun to fail on JD 171.  It is now stuck 
on the 7 cm level. 
 
 
146: RAD , Site none, Wed 24-Jun-1992 21:19:41 GMT, Removed the pyg.out pyrgeometer and che
Removed the pyg.out pyrgeometer and checked its 
battery.  The battery was okay, so replaced it 
(SN 26416F3, cal 3.59e-6 V/W m^-2) with 
 SN 26417F3, cal 4.79e-6 V/W m^-2. 
 
Since the former pyg.out appeared to be wrong 
all along, simply changed the calibration 
coefficient from  
(5 V)/(32767 counts)/(200 gain)/3.59e-6 V/W m^-2) 
   = 0.2125244 W m^-2 per count 
to  
(5 V)/(32767 counts)/(200 gain)/3.59e-6 V/W m^-2) 
   = 0.1592824 W m^-2 per count 
 
 
147: RAD , Site none, Wed 24-Jun-1992 23:22:37 GMT, Tsoil.grass died around 2200 GMT on JD
Tsoil.grass died around 2200 GMT on JD 175. 
Buried it today in an attempt to cool it 
down. 
 
 
163: RAD , Site none, Fri 14-Aug-1992 19:59:18 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 20C to 40C (FootPrint). 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 FOOTPRINT and or 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		-.2 to .2		-.01 to .02 
TS1-3cm		-.2 to .2		-.01 to .01 
TS1-5cm		-.2 to .2		-.01 to .01 
TS1-7cm		-.2 to .2		-.01 to .01 
 
TS2-1cm		 .1 to .3		-.04 to .07 
TS2-3cm		-.1 to .1		-.01 to .02 
TS2-5cm		 .0 to .1		-.02 to .03 
TS2-7cm		-.1 to .0		-.02 to .04 
 
TS3-1cm		-.1 to .1		-.01 to .01 
TS3-3cm		-.1 to .1		-.01 to .01 
TS3-5cm		-.1 to .7		-.03 to .06 
TS3-7cm		-.1 to 1.0		-.06 to .11 
 
 
165: RAD , Site none, Wed 03-Mar-1993 23:41:09 GMT, Soil thermal conductivity correction
Soil heat flux correction due to thermal conductivity, the Philip correction. 
 
The surface heat flux, G, is obtained from the heat flux measured at 8cm and 
the time varying mean temperature of the top 8cm of soil.  
	 
     G(i) = G8(i) 
              + Csoil*(0.08)*(Tsoil(i+1)-Tsoil(i-1))/(t(i+1)-t(i-1)) 
				   
       where: G8 is the heat flux at 8cm depth in the soil 
	      Csoil is the soil heat capacvity 
	      Tsoil is the mean temperature of the top 8cm of soil 
         and: the subscript i refers to data at ti seconds 
                           (i-1) refers to data recorded at t(i-1)seconds 
	                   (i+1) refers to data recorded at t(i+1)seconds 
						   
Soil temperatures are measured at the depths of 1cm, 3cm, 5cm, and 7cm. 
These are weighted to generate a mean soil temperature. 
 
	   Tsoil = ((Tsoil1) + (3 * Tsoil3) + (3 * Tsoil5) + (Tsoil7))/8  
 
Soil heat capacity is derived by determination of the mineral fraction, 
the organic fraction and the water fraction of the soil. 
For the FOOTPRINT92 deployment the soil heat capacity was: 
 
		 Csoil = (1.26 + 6.01 wf) * 10**6 
			    (J degK-1 m-3) 
 
       where: wf is the gravimetric soil moisture: 
	  wf = (mass of fresh soil - mass of dry soil)/mass of dry soil 
 
The gravimetric soil moisture, wf, is determined by collecting 
surface to 8 cm depth soil samples, weighing them fresh, drying the samples 
in an oven at 110 degrees C, and after 24 hours reweighing them. 
 
 
An additional consideration in the determination of the soil heat flux 
is that the soil heat flux measured at 8cm, G8, 
needs to be corrected for the convergent flow of heat through the plate 
due to the difference in the thermal conductivity of the soil and the plate. 
The problem is compounded because the heat flux plates are calibrated in a 
medium, the thermal conductivity of which is different still. 
A relationship was composed by Philip (1961) and further extended by 
Fritschen and Simpson (1989) which corrects for these factors. 
 
  G8(corrected) = G8(measured) 
                        * (1 -1.92(t/d)(1 -(ks/kt))/(1 -1.92(t/d)(1- (km/kt))) 
								 
  where   t = transducer thickness                        
          d = transducer diameter                           
         kt = thermal conductivity of the transducer 
	 km = thermal conductivity of the calibration medium, wet glass beads 
       	 ks = thermal conductivity of the soil   
 
The values used for t, d, kt, and km  were provided by  
		  Radiation Energy Balance Systems 
		  P.O.Box 15512, Seattle, WA 98115-0512 
		  206-624-7221 
with respect to the HFT1 square plates which they sold to us and have since 
calibrated in Apr87 and Dec91. 
Nominal dimensions of HFT1 heatflux plate 0.39cm thick, 3.2cm * 3.2cm. 
This defines an effective diameter of 3.61cm, and a t/d of 0.39/3.61 = 0.108. 
Values of kt = 1.00  W m-1 degC-1 
          km = 0.906 W m-1 degC-1 
         t/d = 0.108 
       km/kt = 0.906 
 
The value for the thermal conductivity of soil, ks, is calculated from an 
expression developed by McInnis (1981) which involves the gravimetric soil 
water percentage, wf. 
 
           ks = 0.64 + (1.63 * wf) - 0.05 * e**(-17 * (wf)**2) 
 
To confirm the reasonableness of these figures a sample calculation follows: 
 
A typical value of wf = 0.08, would lead to a soil thermal conductivity of: 
           ks = 0.64 + (1.63 * 0.08) - 0.05 * e**(-17 * (0.08)**2) 
           ks = 0.64 + 0.13          - 0.05 * e**(-17 * 0.0064) 
           ks = 0.64 + 0.13          - 0.05 * e**(-0.1088) 
           ks = 0.64 + 0.13          - 0.05 * 0.897 
           ks = 0.64 + 0.13          - 0.045  
           ks = 0.725  
 
     This gives a ratio of ks/kt = 0.725 
 
Substituting these values in the Philip correction term gives: 
  G8(corrected) = G8(measured) 
                   * (1 -1.92(t/d)(1 -(ks/kt)))/(1 -1.92(t/d)(1- (km/kt))) 
 
  G8(corrected) = G8(measured) 
                   * (1 -1.92(0.108)(1 -(0.725))/(1 -1.92(0.108)(1- (0.906)) 
 
  G8(corrected) = G8(measured) 
                   * (1 -1.92(0.108)(0.275))/(1 -1.92(0.108)(0.094)) 
 
  G8(corrected) = G8(measured) 
                   * (1 -0.057)/(1 -0.0195) 
 
  G8(corrected) = G8(measured) 
                   * (0.943)/(0.981) 
 
  G8(corrected) = G8(measured) 
                   * 0.961 
 
This looks like a good number; a 4% correction for 8% soil moisture.