| Description: | On 18 June 1996, soil moisture probe 5 data reduced to a very low level.
At 0000 GMT on 19 June 1996 the soil moisture indicated below zero, which
is not physically possible. Over the next few months the soil dried to a
low enough moisture level that the output again went too low. The qc
minimum limit of 0 will indicate these times. The output recovered to
reasonable values on 1 July at 2100 GMT. It again went low on 4
July at 0100 and remained that way until at least 8 July. No data is
available from 9 July to 24 July to allow us to see the behavior during
that period. On 27 July, at 0330 GMT, the output was very high (113.8) for
some unknown reason. The output also went offscale at 0000 on 3 August,
for an unknown reason. The output again went low at 0800-1530 GMT on 10
September and 0000 GMT on 11 September through 0900 GMT on 15 September. No
incorrect values have occurred since. However, it is clear that at very
low soil moisture, probe 5 indicates lower than normal. It will be replaced
when a spare is available.
Affected data are:
15 minute: r_sm5
30 minute: sm5, c_shf5, g5, cs5, ces5, ave_shf, e, h |