Description: | DQR No: Platform: EBBR
Subject: E7 Soil Moisture Probes Offscale
Date Submitted: January 19, 1996
Submitted By: _x_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: EBBR/Soil Moisture Probes
What level data: (raw,a0,a1,b1,c1 etc): a1 (15 and 30 minute)
What location was the data collected at: E7, Elk Falls, KS
Period of time in question (Times vary for different days)
Date 01/07/96 Time 0530-2400 GMT Probe sm2
0530-2130 GMT sm4
1100-1900 GMT sm5
01/08/96 0000-2400 GMT sm2
0130-2300 GMT sm4
0130-2030 GMT sm5
01/09/96 0000-2200 GMT sm2
1130-1900 GMT sm4
1130-1730 GMT sm5
Data should be labeled:
___ questionable ___ All data fields affected
_X_ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
During numerous periods within the days listed above, individual soil moisture
probes indicated high or offscale, on the dry side. The cause of the
problems is unknown. Data since 9 January 1996 has been correct.
Recalculation of ave_shf, e, and h must be made using only the soil moisture
sets with correct soil moisture values.
Affected data values are (# for probe number):
15 minute: rr_sm#
30 minute: sm#, c_shf#, cs#, ces#, g#, ave_shf, e, h
Sensible, latent, and soil heat fluxes can be recalculated using the soil
probe sets that provide correct data. For example, if soil moisture 2 is
incorrect,
ave_shf = (g1 + g3 + g4 + g5)/4
e = -(q + ave_shf)/(1 +bowen)
h = -(e + ave_shf +q),
If soil moisture 2 and 4 are incorrect,
ave_shf = (g1 + g3 + g5)/3
e = -(q + ave_shf)/(1 +bowen)
h = -(e + ave_shf +q),
If soil moisture 2, 4, and 5 are incorrect,
ave_shf = (g1 + g3)/2
e = -(q + ave_shf)/(1 +bowen)
h = -(e + ave_shf +q),
Other observations/measurements impacted by this problem:
see above
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data with this comment.
Data Processing Notes Date
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