P. K. Banerjee

TL;DR: In this article, the effect of ionospheric scintillation on GPS accuracy in the equatorial region of the world has been investigated and it is shown that the accuracy of position fixing with the GPS as indicated by the PDOP (position dilution of precision) factor is degraded when the raypath from the satellite shows deep fading.

TL;DR: In this article, the fatigue property of resistance spot welded DP steels in relation to weld nugget size, microstructures and notch geometry was evaluated and it was shown that fatigue performance under low load is better in joints with smaller nuggets, primarily because of delayed kinked crack initiation as opposed to accelerated kinking crack growth in larger nuggets with dual notches.

TL;DR: The signal-to-noise ratio (SNR) of the L1 (1.6 GHz) transmission from GPS and GLONASS satellites has been recorded at Calcutta (22.58°N, 88.38°E geographic; 32°N magnetic dip, 17.35°N dip latitude) since 1999 by a stand-alone coarse acquisition (C/A) code Ashtec receiver.

TL;DR: The studies show that, in such situations of inferior GNSS satellite visibility, IRNSS/NavIC operating together with GPS, can augment this time-dependent degraded visibility conditions.

TL;DR: A novel mathematical approach is presented to obtain optimal sensing duration (number of samples) in presence of noise uncertainty for energy detection method to attain desired performance in terms of P FA (Probability of False Alarm) and P D (Probable of Detection).