The LSPE-Strip Pointing Reconstruction and Star Tracker
Michele Maris, Maurizio Tomasi, Matteo Baratto, Fabio Paonessa,, Cristian Franceschet, Daniele Tavagnacco, Oscar Antonio Peverini, Fabrizio, Villa, Mario Zannoni, Marco Bersanelli, Barbara Caccianiga, Stefano Mandelli,, Aniello Mennella, Federico Nati, Stefano Sartor

TL;DR
This paper details the development and validation of a pointing reconstruction model and a star tracker prototype for the LSPE-Strip CMB telescope, achieving high accuracy in pointing calibration and error analysis.
Contribution
It introduces a formal Pointing Reconstruction Model and demonstrates a star tracker prototype with sub-arcminute accuracy for the LSPE-Strip telescope.
Findings
Star Tracker RMS accuracy of ~3 arcseconds
Systematic errors below 10 arcseconds
Intercalibration accuracy between 0.25 and 1 arcminute
Abstract
This paper aims to describe the Pointing Reconstruction Model (PRM) and the prototype Star Tracker, which will be mounted on LSPE-Strip, a microwave Q- and W-band CMB telescope planned for installation at the "Observatorio del Teide" in Tenerife. The PRM integrates information on the instantaneous attitude provided by the telescope control system to determine the actual pointing direction and focal plane orientation of the telescope. It accounts for various non-idealities in the telescope setup, represented by eight configuration angles, which will be calibrated using the Star Tracker. Following the derivation of the PRM formalism and its implementation, we investigate the pointing errors caused by incorrect calibration of these configuration angles to validate the required 1 arcminute maximum systematic pointing error for the LSPE-Strip survey. This paper also describes the main…
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Taxonomy
TopicsInertial Sensor and Navigation · Astronomical Observations and Instrumentation · Geophysics and Gravity Measurements
