LTPP Logo Long Term Pavement Performance Logo

LTPP TSSC Home

Data User's Corner





LTPP TABLE NAVIGATOR: Field View


Fields for table: SMP_FREEZE_STATE

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.
NORM_RESISTIVITY

NUMBER(4,3)


Electrical resistivity of the soil at the measurement depth, relative to the extreme values measured at that depth.
NORM_RESISTANCE

NUMBER(4,3)


Electrical resistance of the soil at the measurement depth, relative to the extreme values measured at that depth.
NORM_VOLTAGE

NUMBER(4,3)


Voltage drop of the soil at the measurement depth, relative to the extreme values measured at that depth.
INTERPRET_SOIL_TEMP

NUMBER(4,2)
deg C

Average soil temperature of the day, calculated at the interpretation depth.
TEMPERATURE_SOURCE
TEMP_SOURCEVARCHAR2(1)


Code indicating the source of the temperature data used in freeze state determination
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.
DEPTH_NO

NUMBER(2)


Depth number where freeze state is interpreted.
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.
INTERPRET_DEPTH

NUMBER(4,3)
m

Mid-depth of electrodes used in the measurement, measured for pavement surface; two consecutive electrodes are used in voltage and contact resistance measurements and four in resistivity.
FREEZE_STATE
FREEZE_STATEVARCHAR2(1)


Code indicating whether or not the ground was frozen.
INTERPRET_BASIS
INTERPRET_BASISVARCHAR2(1)


Code indicating the basis for freeze state determination