Hannover 2020 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 28: Precision Measurements and Metrology (Gravity)
Q 28.4: Talk
Wednesday, March 11, 2020, 11:45–12:00, f435
Optical Metrology Terminal for Satellite-to-Satellite Laser Ranging — •Paul Koschmieder1,2, Oliver Mandel1,2, Michael Chwalla1, Thilo Schuldt2,3, Jasper Krauser1, Dennis Weise1, and Claus Braxmaier2,3 — 1Airbus Defense and Space GmbH, 88090 Immenstaad, Germany — 2Universität Bremen, Zentrum für Angewandte Raumfahrttechnologie und Mikrogravitation (ZARM), 28359 Bremen, Germany — 3Institut für Raumfahrtsysteme, Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR), 28359 Bremen, Germany
Interferometric laser ranging is an enabling technology for high-precision satellite-to-satellite tracking within the context of earth observation, gravitational wave detection, or formation flying. Here we report on the design, setup and initial performance verification of a compact monostatic interferometric measurement terminal, set up in quasi-monolithic fashion. The design was driven by parameters such as orbit dynamics, inter-satellite distance and placement of the platform within a satellite deduced from earlier satellite missions and mission studies. A dedicated optical metrology test environment was set up, confirming the potential of the terminal to measure with nanometer accuracy. Furthermore, concepts for an end-to-end test of an inter-satellite optical metrology link are developed. This test will contain thermal and vacuum testing, as well as a simulation of in-orbit satellite dynamics and its effect on the link. This project received financial support from DLR and BMWi under grant number 50EE1407 and 50EE1409.