Restringing Instruments

TIMED Instruments

he Thermosphere, Ionosphere, Mesosphere Energetics and Dynamics (TIMED) mission is providing a core set of measurements defi ning the basic states of the mesosphere and lower thermosphere/ionosphere (MLTI) region (approximately 60–180 km above the Earth’s surface) and its global energy balance. This article discusses the TIMED spacecraft’s suite of four remote sensing instruments designed to ob...

Diagnostic instruments

As a psychological and medical journal, GMS Psycho-Social-Medicine places a high premium on the study of the behavioural, medical and social mechanisms that determine health, well-being and illness across the life span. GMS Psycho-Social-Medicine maintains also a vivid interest in the development and refinement of psychometric instrumentation for measuring psychological constructs. This special...

Avoiding Invalid Instruments and Coping with Weak Instruments

A rchimedes said, “Give me the place to stand, and a lever long enough, and I will move the Earth” (Hirsch, Kett, and Trefil, 2002, p. 476). Economists have their own powerful lever: the instrumental variable estimator. The instrumental variable estimator can avoid the bias that ordinary least squares suffers when an explanatory variable in a regression is correlated with the regression’s distu...

Aanderaa Instruments Data Collecting Instruments for Land Sea and Air

1 Visibility in the atmosphere is of great interest for road and sea traffic and in aviation. The MIRA Visibility Sensor 3544 is designed to fulfill the demand for a small, low power unit to be operated with Aanderaa Measuring Stations. Visibility is often limited by fog and haze and the sensor is designed to detect these factors. The sensor consist of an aluminum body containing all necessary ...

Exhibition of New Instruments