Abstract
The LISA Pathfinder (LPF) mission has demonstrated excellent performance. In addition to having surpassed the main mission goals, data has been collected from the various subsystems throughout the duration of the mission. This data is a valuable resource, both for a more complete understanding of the LPF satellite and the differential acceleration measurements, as well as for the design of the future Laser Interferometer Space Antenna (LISA) mission. Initial analysis of the Optical Metrology System (OMS) data was performed as part of daily system monitoring, and more in-depth analyses are ongoing. This contribution presents an overview of these activities along with an introduction to the OMS.
Highlights
The LISA Pathfinder satellite is a technology demonstrator that has proven the feasbility of some key technologies required for the future Laser Interferometer Space Antenna (LISA) mission [1]
The X1 interferometer determines the position of TM1 relative to the optical bench
The total power per quadrant is calculated. These three products are passed from the Optical Metrology System (OMS) to the Data Management Unit (DMU), where they are processed, nominally using the mean of the nominal and redundant photodiode channels, to give the main OMS outputs in the form of telemetry
Summary
The LISA Pathfinder satellite is a technology demonstrator that has proven the feasbility of some key technologies required for the future Laser Interferometer Space Antenna (LISA) mission [1]. The X1 interferometer determines the position of TM1 relative to the optical bench. The frequency (Freq.) interferometer has a deliberate pathlength mismatch between the two interfering beams, allowing measurement of laser frequency noise.
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