The MODIS radiometric calibration product (Level 1B) is described for the thermal emissive and the reflective solar bands. Specific sensor design characteristics are identified to assist in understanding how the calibration algorithm software product is designed. The reflected solar band software products of radiance and reflectance factor both are… (More)
The Spectro-Radiometric Calibration Assembly (SRCA) provides on-orbit spectral calibration of the MODerate resolution Imaging Spectroradiometer (MODIS) reflected solar bands and this paper describes how it is accomplished. The SRCA has two adjacent exit slits: 1) Main slit and 2) Calibration slit. The output from the main slit is measured by a reference… (More)
J. Guala-Valverde and his colleagues have carried out a series of experiments on unipolar induction, and they present arguments to show that their results are compatible with the predictions of Weber's theory of electrodynamics, while they contradict the predictions of Maxwellian theory. The present paper argues that their results are compatible with either… (More)
A simple model is developed in order to calculate the flow of current in a Faraday disc when it is delivering power to an external circuit. Several counter-intuitive features emerge which are not revealed by a qualitative discussion. The argument is non-relativistic, and it is conducted in the laboratory frame of reference.
When a cylindrical magnet is rotated about its axis, electric fields develop on its surface which can be used to generate continuous currents. This effect is an example of electromagnetic induction, mechanical energy being converted into electrical energy, through the mediation of the magnetic field. It is suggested that the effect can be explained most… (More)
The paper by H. Montgomery published in this issue, , exhibits a curious mix between local action models (fields) and non local (action a distance) prospects. When dealing with the motor configuration (Section 4, figure 7), Montgomery makes use of the (Amperian) surface currents instead of the B-field itself. By analysing the case B (the probe anchored… (More)