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   Optimization of a hybrid highly elliptical orbit-based navigation system for continuous high accuracy navigation: An optimum choice for regional navigation; Jaffer, Ghulam  ; et alin Navigation (2019), 66(2), 289--303 Detailed reference viewed: 25 (0 UL)Toward GIS-Based Approach for Identification of Ecological Sensitivity Areas: Multi-Criteria Evaluation Technique for Promotion of Tourism in Soon Valley, Pakistan; ; et al in Journal of the Indian Society of Remote Sensing (2019) Detailed reference viewed: 35 (3 UL)The effects of ionospheric irregularities on the navigational receivers and its mitigation; ; et al in International Conference for Emerging Technologies in Computing (2018, July 20) The performance of navigational receivers using satellite-based navigation technology can be severely affected by the presence of time-varying electron-density fluctuations in the ionosphere which can ... [more ▼] The performance of navigational receivers using satellite-based navigation technology can be severely affected by the presence of time-varying electron-density fluctuations in the ionosphere which can cause amplitude and phase perturbations at the receiver resulting in loss of phase lock at the carrier tracking loop due to cycle slip and hence unavailability of the navigation services. This paper studies the effects of amplitude and phase fluctuations at high latitudes due to the irregular ionosphere and, their effects on the receiver performance by using real time raw data from the Global Positioning Systems (GPS) satellites. The paper also suggest the use of adaptive software-based receiver model or modified hardware receivers to mitigate the effects of amplitude and phase fluctuations due to irregular ionosphere. [less ▲] Detailed reference viewed: 45 (0 UL)Cost-effective and novel regional navigation system using HEO/GEO and GEO/IGS Constellations; ; Jaffer, Ghulam et alin IET Radar, Sonar Navigation (2018), 12(2), 276--285 Detailed reference viewed: 30 (1 UL)Internet-to-orbit gateway and virtual ground station: A tool for space research and scientific outreachJaffer, Ghulam ; ; in Acta Astronautica (2011), 69(7), 658-666 Detailed reference viewed: 36 (0 UL) |
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