Optical ranging and data communication in space-based applications
| Autor: | Gerhard Heinzel, J. Eichholz, Antonio M. Peinado, Juan Jose Esteban, Karsten Danzmann, Joachim Kullmann, Antonio Garcia, Iouri Bykov |
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| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | Proceedings of the 2010 7th Workshop on Positioning, Navigation and Communication WPNC |
| Popis: | Ranging measurements in the radio band have been extensively used in space-based applications, for example in GNSS for navigation and GRACE for mapping the Earth-s gravity field. However, the increasing demand for high-bandwidth communication and precision ranging will make optical systems ideal for these applications. Our investigations are focused on inter-spacecraft laser ranging and data communication for the LISA mission using Direct Sequence Spread Spectrum (DS/SS) modulation onto the laser links. We present the setup of an optical experiment to test the levels of performance achievable with a single laser link as well as a new hardware prototype based on FPGA (Field Programmable Gate Array) processing. This prototype performs the phase readout of the interferometric signal at microcycle sensitivity, ranging measurements at sub-meter accuracy, data communication at rates of several kilobits per seconds and is compatible with inter-spacecraft clock noise transmission and digital laser offset-phase locking. |
| Databáze: | OpenAIRE |
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