We present various performance trades for multiantenna global navigation satellite system (GNSS) multisensor attitude estimation\nsystems. In particular, attitude estimation performance sensitivity to various error sources and system configurations is assessed.\nThis study is motivated by the need for system designers, scientists, and engineers of airborne astronomical and remote sensing\nplatforms to better determine which system configuration is most suitable for their specific application. In order to assess\nperformance trade-offs, the attitude estimation performance of various approaches is tested using a simulation that is based on a\nstratospheric balloon platform. For GNSS errors, attention is focused on multipath, receiver measurement noise, and carrierphase\nbreaks. For the remaining attitude sensors, different performance grades of sensors are assessed. Through a Monte Carlo\nsimulation, it is shown that, under typical conditions, sub-0.1-degree attitude accuracy is available when using multiple antenna\nGNSS data only, but that this accuracy can degrade to degree level in some environments warranting the inclusion of additional\nattitude sensors to maintain the desired level of accuracy. Further, we show that integrating inertial sensors is more valuable\nwhenever accurate pitch and roll estimates are critical.
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