gLISA: geosynchronous Laser Interferometer Space Antenna concepts with off-the-shelf satellites

TL;DR

This paper proposes two cost-effective geosynchronous gravitational wave detection mission concepts using off-the-shelf satellites and a novel two-stage drag-free system, aiming to significantly reduce mission costs compared to previous designs.

Contribution

Introduction of two innovative geosynchronous gravitational wave mission concepts utilizing commercial satellites and a new drag-free system without micro-Newton thrusters.

Findings

Both concepts could be operated at less than $500 million each.

A detailed mission cost analysis is planned for 2015 at JPL.

The proposed systems could enable cost-effective gravitational wave detection in geosynchronous orbit.

Abstract

We discuss two geosynchronous gravitational wave mission concepts, which we generically name gLISA. One relies on the science instrument hosting program onboard geostationary commercial satellites, while the other takes advantage of recent developments in the aerospace industry that result in dramatic satellite and launching vehicle cost reductions for a dedicated geosynchronous mission. To achieve the required level of disturbance free-fall onboard these large and heavy platforms we propose a "two-stage" drag-free system, which incorporates the Modular Gravitational Reference Sensor (MGRS) (developed at Stanford University) and does not rely on the use of micro-Newton thrusters. Although both mission concepts are characterized by different technical and programmatic challenges, individually they could be flown and operated at a cost significantly lower than those of previously envisioned gravitational wave missions. We estimate both mission concepts to cost less than 500M US$ each, and in the year 2015 we will perform at JPL a detailed selecting mission cost analysis.