Distance measuring equipment (DME) and its military counterpart tactical air navigation (TACAN) has been a cornerstone of aviation navigation since its development in the 1950s. It is still one of the most commonly used aviation navigation aid. However, future airspace will need to accommodate increased traffic levels, more precise operations and autonomous air vehicles which will increase dema...

The key limitation of existing Real-Time Kinematic (RTK) systems is the service distances between reference stations and user receivers due to the impact of distance-dependent biases such as orbit error, and ionospheric and tropospheric signal delay. In current Network-RTK implementations, the inter-station distance is typically 70km to 90km. If coverage were to be extended to the whole Queensl...

Geofences are virtual boundaries based on geographic coordinates. When combined with global position system (GPS), or more generally global navigation satellite system (GNSS) transmitters, geofences provide a powerful tool for monitoring the location and movements of objects of interest through proximity alarms. However, the accuracy of geofence alarms in GNSS-radio frequency (GNSS-RF) transmit...

Satellite communications system uses various satellites to transmit radio signals between earth terminals. A typical operational link includes an active satellite and two or more earth terminals. Satellite communication is one of the significant factor from the space programs and has made a major contribution to the international communication. There are various types of information that can be...

Nonsupervised classification by clustering has been shown to be a very important tool in the analysis of satellite remote senSing data. However, clustering algorithms which use Euclidean distance as a measure of similarity are highly sensitive to scaling differences among the variables which participate in the clustering process. Since the Landsat MSS spectral bands have different ranges and di...

Movements of two female one-humped camels in central Australia were tracked using satellite telemetry between March 1986 and July 1987. During that time both animals travelled a minimum distance of over 1000 km within a radius of 125 km for one animal, and 200 km for the other. However, their movements were quite punctuated and both animals spent periods of up to several months in relatively sm...

distinguishing the susceptible areas to landslide using different landslide susceptibility mapping (lsm) models is one of the primitive and basic works to reduce probable damages and reduce risk. the main purpose of this research is the efficiency evaluation of four methods including information value (winf), valuing area accumulation (wa), analytical hierarchy process (ahp), kopta-joshi propos...