Characterization of the Effects of Temperature and Instrument Drift in Long-Term Comparative Geomagnetic Vector Observations

In order to minimize interruptions recording, geomagnetic observatories usually use a back-up instrument operating simultaneously with the primary in obtain comparative observations. Based on correction parameter calculation method established previous work, we focused effects of temperature and drift vector The linear influence data was shown be variable. relative coefficient changed around inflection point showed V-type distribution scatter plot. This conclusion verified laboratory experiments. long-term time between instruments exhibits pattern, fitness model can evaluated by degree which residual fitted straight line conforms normal distribution. However, absolute value variometers same type probe is very small. Therefore, should carried out care. associated analysis conclusions have potential benefit agreement observations testing performance instruments.