The southwest mountainous area of China is one the areas with most landslides in world. In this paper, we used Ya’an City and Garzê Tibetan Autonomous Prefecture Sichuan Province as research to explore identification application effects large-area potential using synthetic aperture radar (SAR) data different wavelength types (Sentinel-1, ALOS-2), processing methods (SBAS-InSAR, Stacking-InSAR),...

Abstract Satellite-Based Augmentation System (SBAS) is essential to support aircraft navigation. L1 SBAS operates on the frequency (1575.42 MHz) and currently still of interest since all GNSS satellites receivers do not fully additional frequencies such as L5 (1176.45 MHz). Although Global Positioning (GPS) aided Geo Augmented Navigation (GAGAN) available, performances are degraded due discrepa...

در این مقاله یک مدل ریاضی برای مسئله سیستم تولیدی همکارانه ساخت بر اساس سفارش با رعایت انصاف تخصیص بار‌های تولید طراحی شده است. اهداف اصلی مدل، کمینه‌سازی هزینه‌‌های کل و حداکثر استفاده از منابع به‌منظور عادلانه شرایط عدم­قطعیت کنترل پارامتر‌های غیرقطعی روش برنامه‌ریزی فازی ‌شده نتایج نشان می‌دهد افزایش نرخ عدم‌قطعیت، می­یابد. ازآنجاکه ظرفیت کارخانه‌ها ثابت است، مقدار تقاضا، هر کارخانه نیز می­ی...

Abstract Due to lack of advanced navigation systems, secondary airports are normally unable support instrument approaches in low visibility conditions (LVC) more adverse than Category (CAT) I, making them inaccessible during such conditions. Incoming flights then delayed, diverted adjacent airports, or cancelled before take-off. This paper presents an onboard solution, under development scope S...

The topic of the paper is to describe influences of the difficult environment to the GNSS and SBAS signals and consequences for signal processing. At first, the issues related to signal reception in difficult environment are discussed, namely signal attenuation and shadowing, multipath propagation and effects related to user receiver movement. The satellite line of sight shadowing influence to ...

In most systems providing GNSS integrity to aircraft, like Satellite-based Augmentation Systems (SBAS), Groundbased Augmentation Systems (GBAS), Receiver Autonomous Integrity Monitoring (RAIM), or the proposed Advanced RAIM, the user position is computed using only the measurements of the current epoch (albeit carrier-smoothed). This snapshot approach is well suited for integrity, because it do...