A temperature measurement technique is presented for calibration of integrated temperature sensors after packaging. An on-chip bipolar transistor is used to accurately determine the sensor’s temperature during calibration. The transistor’s base-emitter voltage is measured at three collector currents to find the absolute temperature while compensating for series resistances. The technique does n...

We report a low temperature measurement technique and the magnetization data of a quantum molecular spin, by implementing an on-chip SQUID technique. This technique enables SQUID magnetometry in high magnetic fields, up to 7 T. The main challenges and the calibration process are detailed. The measurement protocol is used to observe quantum tunneling jumps of the S = 10 molecular magnet, Mn(12)-...

The 10% amplitude calibration accuracy achievable with the current standard calibration techniques may be suucient to produce images with dynamic range of 10 3 , but achieving a dynamic range of 10 4 or higher with the MMA requires better than 1 percent accuracy in amplitude calibration. A self-calibration technique may be applied to improve images, but it may not be possible in all cases. Ther...

With a view to ensuring the validity of multivariate calibration models in the presence of temperature variations, a new methodology, individual contribution standardization (ICS), is proposed to correct for temperature-induced spectral variations. The methodology was applied to shortwave NIR spectral data sets recorded at different temperatures. The results showed that ICS can almost eliminate...

We report our progress on the development of thermal calibration and stabilization for silicon MEMS gyroscopes with high quality (Q) factors. The temperature-induced drifts of most MEMS limit their potential applications in realworld missions. To address this limitation, we investigated a long-term bias drift compensation algorithm using the silicon MEMS quadruple mass gyroscope (QMG) with sign...

Calibration and retrieval are two important and critical techniques for groundbased atmospheric microwave sounder. Adopting proper calibration methods will ensure a high sounding resolution. The paper uses two calibrated methods like LN2 (22–31 GHz and 51– 59GHz) calibration and sky tipping (22–31 GHz) to realize periodic calibration and using noise injection and in-built blackbody to realize i...

We describe a new technique for monitoring intra-cuvette temperatures in temperature-controlled spectrophotometric cells by use of two solutions, one for which absorbance is highly sensitive to temperature and one for which absorbance is insensitive to temperature. The first solution, cresol red in tris(hydroxymethyl)aminomethane buffer, is used to construct an absorbance-vs.-temperature calibr...

Accurate measurement of soil temperature gradients is important for the estimation of soil heat flux and latent heat flux, both major components of the surface energy balance. Soil temperature gradients are commonly measured using heat-pulse sensors equipped with thermistors. In this study, individual thermistors showed absolute temperature differences on the order of 0.2°C when placed under un...

System calibration is fundamental to the overall accuracy of the ultrasonic temperature measurement, and it is basically involved in accurately measuring the path length and the system latency of the ultrasonic system. This paper proposes a method of high accuracy system calibration. By estimating the time delay between the transmitted signal and the received signal at several different tempera...