This paper presents a method for on-orbit calibration of photodiodes for sun sensing in an attitude determination system. The calibration estimates the scale factors and alignment angles of the photodiodes, resulting in higher attitude determination accuracy than achieved with the pre-flight calibration parameters. The calibration is implemented with an extended Kalman filter to simultaneously ...

INTRODUCTION Since the methodologies used to calculate Stegomyia indices have been shown to be inadequate for assessing the risk of dengue virus transmission and targeting Aedes aegypti control strategies, new surveillance methods are needed. OBJECTIVE To evaluate the water-surface sweeping method in combination with calibration factors to estimate the total number of Ae. aegypti late larval ...

Hong Hua Chunyu Gao Abstract — Augmented reality (AR) is a technology in which computer-generated virtual images are dynamically superimposed upon a real-world scene to enhance a user’s perceptions of the physical environment. A successful AR system requires that the overlaid digital information be aligned with the user’s real-world senses – a process known as registration. An accurate registra...

BACKGROUND In the development of noninvasive glucose monitoring technology, it is highly desirable to derive a calibration that relies on neither person-dependent calibration information nor supplementary calibration points furnished by an existing invasive measurement technique (universal calibration). METHOD By appropriate experimental design and associated analytical methods, we establish ...

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...

This thesis mainly deals with large scale objects of height around 1.5 meters. It uses a dynamic stereo model or a binocular stereo model to calibrate and reconstruct a 3D large scale object. This thesis briefly introduces two basic calibration techniques, i.e. DLT calibration technique and Tsai’s calibration technique. It then discusses and evaluates the impact of different factors on the cali...

In the United States, there are several federal agencies interested in the effects of UV radiation, which has resulted in the establishment of UV monitoring programs each with their own instrumentation and sites designed to address their specific needs. In 1993, participating agencies of the U.S. Global Change Research Program organized a UV Panel for coordinating the different agencies’ progra...

Cosmic Ray Tau Neutrino Telescopes (CRTNT) using for sub-EeV cosmic ray measurement is discussed. Performances of a stereoscope configuration of a tower of those telescopes plus two side-triggers are studied by using a detailed detector simulation driven by Corsika. Detector aperture as a function of shower energy above 10 eV is calculated. Event rate of about 20k per year for the second knee m...

Cosmic Ray Tau Neutrino Telescopes (CRTNT) using for sub-EeV cosmic ray measurement is discussed. Performances of a stereoscope configuration of a tower of those telescopes plus two side-triggers are studied by using a detailed detector simulation driven by Corsika. Detector aperture as a function of shower energy above 10 eV is calculated. Event rate of about 20k per year for the second knee m...

This paper compares three methods of item calibration—concurrent calibration, separate calibration with linking, and fixed item parameter calibration—that are frequently used for linking item parameters to a base scale. Concurrent and separate calibrations were implemented using BILOG-MG. The Stocking and Lord (1983) characteristic curve method of parameter linking was used in conjunction with ...