The navigation of future interplanetary spacecraft will require an increasing degree autonomy to enhance space system performance. A real-time trajectory determination is paramount importance reduce the risks operations devoted exploration celestial bodies in solar and dependence loading on ground systems. We present a technique for sequential estimation orbits through processing line-of-sight ...

The advent of satellite tracking and communications technology has motivated organizations to investigate centralized real-time support for remote and mobile units and operations. Transportation companies have begun to use satellite tracking systems, production and energy plants are employing intelligent monitoring systems, and on-site emergency managers are being supported by headquarters in t...

Using the principle of energy conservation has been considered for gravity field determination from satellite observations since the early satellite era, see e.g. O’Keefe (1957), Bjerhammar (1968), Reigber (1969) or Ilk (1983). CHAMP is the first satellite to which the energy balance approach can be usefully applied, now that near-continuous orbit tracking by GPS is available, aided by accelero...

Using remote sensing video to monitor aircraft dynamics is significant for military applications, airport management, and rescue. The has a fixed size obvious characteristics, so it suitable correlation filtering. Correlation filtering algorithms can extract features from input data predict motion trajectories, the calculation speed of filterings fast. Hence, such are advantageous tracking targ...

The image-based detection and tracking of moving objects are extremely important for many aerospace and aviation applications, including satellite-based imagery. In this paper, we briefly review various approaches related to image-centroid and/or target tracking. We emphasize square root algorithms that are supposed to be more efficient than the basic implementation of KF. Then, we present some...

Improvement of orientation control laws for an underactuated satellite, is attemted using a nonlinear optimal control algorithm derived by Beard, et al. 1. A control law for an underactuated satellite would be used when the spacecraft is damaged during it's mission. Because of the immense cost in accessing space, recovery and repair is uncommon. Also, for this reason, it is necessary to maximiz...

A moon or natural satellite is a celestial body that orbits a planetary body such as a planet, dwarf planet, or an asteroid. Scientists seek understanding the origin and evolution of our solar system by studying moons of these bodies. Additionally, searches for satellites of planetary bodies can be important to protect the safety of a spacecraft as it approaches or orbits a planetary body. If a...

Increasing complexity and costs of satellite missions promote the idea of extending the operational lifetime or improving functionalities/performance of a satellite in orbit instead of simply replacing it by a new one. Further, satellites in orbit can severely be affected by aging or degradation of their components and systems as well as by consumption of available resources. These problems may...

Satellite-derived precipitation can be a potential source of forcing data for assessing water availability and managing water supply in mountainous regions of East Asia. This study investigates the hydrological utility of satellite-derived precipitation and uncertainties attributed to error propagation of satellite products in hydrological modeling. To this end, four satellite precipitation pro...