Methods and systems for weighting calibration points and updating lag parameters

An analyte monitoring system comprising:

• an analyte sensor including an indicator element that exhibits one or more detectable properties based on a concentration of an analyte in proximity to the indicator element;
• and
• a transceiver configured to:
• receive first sensor data from the analyte sensor;
• use a conversion function and at least the first sensor data to calculate a first sensor analyte level;
• receive second sensor data from the analyte sensor;
• use the conversion function and at least the second sensor data to calculate a second sensor analyte level;
• receive a first reference analyte measurement (RM1), wherein the RM1 has a time stamp in between time stamps of the first and second sensor analyte levels;
• update the conversion function using at least the RM1 as a calibration point, wherein updating the conversion function comprises:
• interpolating a sensor analyte level having a time stamp that matches the time stamp of the RM1 using at least the first and second sensor analyte levels and the time stamps of the first and second sensor analyte levels,
• pairing the RM1 with the interpolated sensor analyte level, and
• using the pairing of the RM1 with the interpolated sensor analyte value to update the conversion function;
• receive third sensor data from the analyte sensor;
• and
• use the updated conversion function to calculate a third sensor analyte level.