A 3mm band detector indoor calibration system is introduced in this paper, which is based on a STM32 embedded system. This embedded control system includes noise source control circuit, database circuit, a real time clock circuit, humidity and temperature sensor circuit, PS/2 interface circuit and SD card interface circuit. And a database, which contains radiation characteristics of metal targe...

The propagating process of data chain of a large instrument is usually indicated by the traceability model. In this paper, to enhance the measurement accuracy of the precipitation radar, we proposed a traceability mode design scheme for the power measurement internal the precipitation radar, which is the key parameter relating to the precipitation measurement. Unlike the conventional internal c...

Abstract. We analysed the operational infrared (IR) calibration of the AVHRR radiometers onboard NOAA-12, 14 and 15 satellites. It was shown that solar blackbody contamination aVects the calibration of all IR channels. This source of error in the calibration may result in uncertainties in the estimation of sea surface temperature (SST) up to 0.5K or more. We propose an approach to correct this ...

Non-invasive optoacoustic mapping of temperature in tissues with low blood content can be enabled by administering external contrast agents. Some important clinical applications of such approach include temperature mapping during thermal therapies in a prostate or a mammary gland. However, the technique would require a calibration that establishes functional relationship between the measured no...

This paper proposes a new approach to calibration of inertial sensors. Instead of requiring stable and precise reference data, we address calibration (and testing) during changing angular rates and temperatures. This approach reduces significantly the equipment cost and calibration time, which is often a critical factor in calibration cost. Moreover, due to the capability to collect dense data,...

BACKGROUND Portable direct-reading instruments by light-scattering method are increasingly used in airborne fine particulate matter (PM2.5) monitoring. However, there are limited calibration studies on such instruments by applying the gravimetric method as reference method in field tests. METHODS An 8-month sampling was performed and 96 pairs of PM2.5 data by both the gravimetric method and t...

The status of the SPI energy calibration after the first year of INTEGRAL operations is reported. We have studied the gain variations and we have demonstrated that the most important parameter is the ger-manium detector temperature. This study permits us to determine the limits of our calibration method and the frequency of calibrations needed.

This paper presents the calibration results and uncertainty analysis of a high-precision reference pressure measurement system currently used in wind tunnels at the NASA Langley Research Center (LaRC). Sensors, calibration standards, and measurement instruments are subject to errors due to aging, drift with time, environment effects, transportation, the mathematical model, the calibration exper...