Altimetry with GNSS Bistatic Radar
Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
For the past two decades, Global Navigation Satellite System (GNSS) signals have been explored in terms of Earth remote sensing. Most work has been done on the Global Positioning System (GPS) signals. GNSS signals are reflected off the surface of the Earth and can be received using a left hand polarized antenna which could offer a low cost alternative to existing remote sensing instruments. The reflected GNSS signals can, together with the direct signals, be processed to provide altitude estimations of the receiver. If reflected off for example the surface of the ocean, the reflected signal carries information about the near surface winds and surface state. Most receivers use the publicly available GPS L1 signals for processing. The newer GPS L5 signals have different signal properties than the GPS L1 signal which gives a sharper correlation waveform that should lead to higher measurement sensitivity. This thesis work consisted of building a bistatic GNSS system capable of receiving L1, L2 and L5 signals. The system was tested on a 300 meter high tower and data was collected during the ascent and descent. The data collected on the tower was processed in terms of altimetry using the Wide Area Augmentation System (WAAS) L5 signals. The bistatic system was installed in the National Oceanic and Atmospheric Administration (NOAA) hurricane hunter airplane Kermit. The system collected approximately 12 hours of direct and reflected GNSS data while flying through hurricane Rafael and Sandy. The collected flight data is in the initial stages of bistatic processing.
Place, publisher, year, edition, pages
2013. , 56 p.
IdentifiersURN: urn:nbn:se:ltu:diva-57140Local ID: dd54e18a-57ab-4fe2-abe5-544c3550e32eOAI: oai:DiVA.org:ltu-57140DiVA: diva2:1030527
Subject / course
Student thesis, at least 30 credits
Space Engineering, master's level
Validerat; 20130121 (global_studentproject_submitter)2016-10-042016-10-04Bibliographically approved