The use of Global Navigation Satellite System (GNSS) signals reflected from the Earth’s surface has progressed from its beginnings in the early 1990’s to a demonstrated practical linkage of measurements to geophysical characteristics of ocean, ice and land surfaces. A pioneering space-based experiment was carried on the UK-DMC satellite launched in September of 2003. The GPS receiver on the sat...

The performance of the Multicast Dissemination Protocol (MDP) in a simulated satellite channel is investigated. The environment that is modeled is that to be expected in a small satellite communications environment including channel errors and link interruptions. The satellite link is simulated with a channel environment simulator. The performance of MDP is compared with file transfer protocol ...

Over the past few years, we have reported on the performance issues faced by TCP/IP based applications on satellite links. Performance is limited by the delay inherent in geosynchronous systems and the probability of bit errors found in any wireless system, including satellite systems. These limitations are becoming more important as new satellite systems o er much higher data transmission rate...

Over the past few years, we have reported on the performance issues faced by TCP/IP based applications on satellite links. Performance is limited by the delay inherent in geosynchronous systems and the probability of bit errors found in any wireless system, including satellite systems. These limitations are becoming more important as new satellite systems ooer much higher data transmission rate...

Significant numbers of bird species forage on the tubers of the submerged aquatic species. This resource is difficult to map due to the submerged nature of these species. Because the temperature is the primary driving factor of photosynthesis in these vegetation species, it is possible to map the distribution and biomass production of these submerged species indirectly. For the relative short g...

We present a method for on-orbit, attitudeindependent magnetometer calibration that includes the effect of time-varying bias due to electronics on-board a spacecraft. The calibration estimates magnetometer scale factors, mis-alignments, and constant as well as time-varying bias. Timevarying effects are mitigated by including spacecraft telemetry in the measurement model and estimating constant ...

Harmful algal blooms (HABs) are severe ecological disasters threatening aquatic systems throughout the World, which necessitate scientific efforts in detecting and monitoring them. Compared with traditional in situ point observations, satellite remote sensing is considered as a promising technique for studying HABs due to its advantages of large-scale, real-time, and long-term monitoring. The p...