Rotatable sensors for measuring characteristics of subterranean formation

A system comprising:

• a tool string;
• a transmitter rotatable relative to the tool string;
• a first angular position sensor arranged with a first known rotational relationship with the transmitter;
• a receiver rotatable relative to tool string;
• a second angular position sensor arranged with a second known rotational relationship with the receiver;
• and
• an information handling system communicatively coupled with at least the receiver, the information handling system comprising a processor and a memory device coupled with the processor, the memory device containing a set of instructions that, when executed by the processor, cause the processor to determine a characteristic of a subterranean formation relative to the tool string based, at least in part, on outputs received from the receiver, the first angular position sensor, and the second angular position sensor.

A method comprising:

• transmitting a first signal via a transmitter coupled with a tool string in a subterranean formation;
• receiving a second signal associated with the first signal via a receiver coupled with the tool string, wherein the transmitter or the receiver is rotating relative to the tool string;
• detecting an angular position of the transmitter or the receiver as the transmitter or the receiver rotates relative to the tool string;
• and
• determining a characteristic of the subterranean formation at a position relative to tool string based, at least in part, on the second signal and the angular position.