Measurement calibration apparatus, methods, and systems

A processor-implemented measurement calibration method, to execute on one or more processors that perform the method, comprising:

• determining spatial orientations of at least one tilted transmitter attached to a first downhole component relative to at least one tilted receiver attached to a second downhole component, at common points in time during rotation of the first and the second downhole components, the first downhole component being variably, rotationally coupled to the second downhole component;
• and
• transforming raw measurements of transmitter signals provided by the at least one tilted receiver into calibrated measurements based on the spatial orientations at the common points in time.

An article including a machine-accessible medium having instructions stored therein, wherein the instructions, when accessed, result in a machine performing:

• determining spatial orientations of at least one tilted transmitter attached to a first downhole component relative to at least one tilted receiver attached to a second downhole component, at common points in time during rotation of the first and the second downhole components, the first downhole component being variably, rotationally coupled to the second downhole component;
• and
• transforming raw measurements of transmitter signals provided by the at least one tilted receiver into calibrated measurements based on the spatial orientations at the common points in time.