ToF depth sensor characterization data (VL53L1X)

Experimental characterization of the VL53L1X ToF depth sensor and the HC-SR04 (ultrasonic).<br>Data files have descriptive headers that explain the experimental setup. <br><b>Ultrasonic Sensor Range (mm): </b>measured distance by ultrasonic sensor <b>Optical Sensor Range (mm): </b>measured distance<b>Range Status:</b> a flag from the VL53L1X determining if ranging was successful<b>Signal Rate Return Mega cps: </b>signal rate, best to normalize by the number of enabled SPADs.<b>Ambient Rate Return Mega cps: </b>ambient rate, best to normalize by the number of enabled SPADs.<b>Stream Count: </b>ignore<b>Effective SPAD Return Count: </b>the number of enabled SPADs<b>Sigma mm: </b>the noise as determined by the sensor, our reported noise does not use this value but rather the standard deviation of multiple measurements<b>Time for Iteration:</b> time in seconds for the measurement<b>Setting Number: </b>describes timing budget and ranging mode, see lookup table in Python analysis code <br><br>ROI scans also have.<b>Block Location: </b>The row of a 4x4 ROI<b>Grid Location: </b>The index of a 4x4 ROI (row*column). Max is 13x13 = 169.<br>