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Preliminary results of the nasa beacon receiver for alphasat aldo paraboni tdp5 propagation experiment
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Luini, Lorenzo Nessel Sr., James Zemba, Michael Riva, Carlo Morse, Jacquelynne |
| Copyright Year | 2014 |
| Description | NASA Glenn Research Center (GRC) and the Politecnico di Milano (POLIMI) have initiated a joint propagation campaign within the framework of the Alphasat propagation experiment to characterize rain attenuation, scintillation, and gaseous absorption effects of the atmosphere in the 40 GHz band. NASA GRC has developed and installed a K/Q-band (20/40 GHz) beacon receiver at the POLIMI campus in Milan, Italy, which receives the 20/40 GHz signals broadcast from the Alphasat Aldo Paraboni TDP#5 beacon payload. The primary goal of these measurements is to develop a physical model to improve predictions of communications systems performance within the Q-band. Herein, we describe the design and preliminary performance of the NASA propagation terminal, which has been installed and operating in Milan since May 2014. The receiver is based upon a validated Fast Fourier Transform (FFT) I/Q digital design approach utilized in other operational NASA propagation terminals, but has been modified to employ power measurement via a frequency estimation technique and to coherently track and measure the amplitude of the 20/40 GHz beacon signals. The system consists of a 1.2-m K-band and a 0.6-m Qband Cassegrain reflector employing synchronous open-loop tracking to track the inclined orbit of the Alphasat satellite. An 8 Hz sampling rate is implemented to characterize scintillation effects, with a 1-Hz measurement bandwidth dynamic range of 45 dB. A weather station with an optical disdrometer is also installed to characterize rain drop size distribution for correlation with physical based models. |
| File Size | 797262 |
| Page Count | 9 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20150002100 |
| Archival Resource Key | ark:/13960/t7tn2749h |
| Language | English |
| Publisher Date | 2014-10-01 |
| Access Restriction | Open |
| Subject Keyword | Propagation Ka-band Q-band Power Spectra Time Series Analysis Calibrating Receivers Performance Prediction Microwave Frequencies Telecommunication Scintillation Radiant Flux Density European Communications Satellite Frequency Measurement Fast Fourier Transformations Data Links Rain Beacons Ariane 5 Launch Vehicle Atmospheric Attenuation Radio Transmission Payloads Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
