Near-to-real time as well as “archive quality” Brewer total ozone observations, which are performed with well maintained and calibrated instruments over the Northern Hemisphere have been used for the validation of the total ozone column product of the Ozone Monitoring Instrument (OMI) aboard the NASA EOS-Aura satellite. During the commissioning phase of OMI, the near-to-real time ground-based d...

NAVSYS High Gain Advanced GPS Receiver (HAGR) uses a digital beamsteering antenna array to track up to twelve GPS satellites on L1 and L2, each with up to 10 dBi of additional antenna gain over a conventional receiver solution. This digital, reprogrammable architecture provides a costeffective solution for military applications where precision GPS measurements are needed. The additional gain pr...

We developed and tested a methodology to estimate olive (Olea europaea L.) gross primary production (GPP) combining ground and multi-sensor satellite data. An eddy-covariance station placed in an olive grove in central Italy provided carbon and water fluxes over two years (2010–2011), which were used as reference to evaluate the performance of a GPP estimation methodology based on a Monteith ty...

in this paper, a ground early warning receiver is introduced and explained for the reception and monitoring of signal from a space-borne synthetic aperture radar. this receiver can be used for various electronic warfare applications and implemented in two sectors of time parameter detector and frequency parameter detector. it can measure power, bandwidth, central frequency, pulse width, pulse r...

A means for reducing the risk for an on-orbit robotic servicing and assembly mission through the development of a series of testbeds that build successively upon one another is investigated. Robotic Servicing and Assembly (RSA) missions are believed to enable life extension programs for existing spacecraft while also enabling much larger and more complex satellites to be developed through on-or...

High-data-rate ground-to-space optical links are envisioned to be an alternative and more probably a next step to radio-frequency links, after the Q/V band still under development [1] for the feeder links of next generation high throughput satellites. Indeed, optical links allow a significant increase of the available spectral resources per link. This enables a drastic reduction of the number o...

Abstract. Previous studies utilizing the Global Positioning System (GPS) receivers aboard Jason satellites have performed measurements of plasmasphere electron content (PEC) by determining total (TEC) above these satellites, which are at altitudes about 1340 km. This study uses similar methods to determine PEC for Jason-2 receiver 24 July 2011. These values compared previous determinations from...