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Fields for table: SMP_TDR_AUTO_DIELECTRIC

Field NameCodesData TypeUnitsTest ProtocolDescription
STATE_CODE
STATE_PROVINCENUMBER(2)


Numerical code for state or province. U.S. codes are consistent with Federal Information Processing Standards.
TRACE_TYPE
TRACE_TYPEVARCHAR2(1)


Code indicating the TDR trace type.
APPARENT_LENGTH

NUMBER(3,2)
m

Interpreted apparent length (la).
TDR_PROBE_LENGTH

NUMBER(4,3)
m

Actual length of TDR probe.
DIELECTRIC_CONSTANT

NUMBER(4,2)


Computed dielectric constant (ka).
SHRP_ID

VARCHAR2(4)


Test section identification number assigned by LTPP program. Must be combined with STATE_CODE to be unique.
SMP_DATE

DATE


Measurement date.
TDR_TIME

VARCHAR2(4)
hhmm

TDR measurement time.
TDR_NO

NUMBER(2)


ID number of TDR probe.
CONSTRUCTION_NO

NUMBER(2)


Event number used to relate changes in pavement structure with other time dependent data elements. This field is set to 1 when a test section is initially accepted into LTPP and is incremented with each change to the layer structure.
RECORD_STATUS

VARCHAR2(1)


A code indicating the general quality of the data.
INFLECTION_A

NUMBER(4,3)
m

TDR trace 1st inflection point.
INFLECTION_B

NUMBER(4,3)
m

TDR trace 2nd inflection point.