Drone-based polarization calibration source for mm-wave telescopes

Dünner, Rolando; Fluxa, J.; Best, Sergio; Carrero, Felipe; Boettger, D.

doi:10.23919/eucap51087.2021.9411058

Cited by 1 publication

(1 citation statement)

References 8 publications

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“…At the moment, sources mounted on tall structures have been successfully used for beam calibration (BICEP2/Keck Array XI et al 2019). For the future, balloons (Masi et al 2006), drones (Dünner et al 2021), and even satellites (Johnson et al 2015) are being considered. The use of drones for calibration purposes is the subject of multiple active studies (Nati et al 2017).…”

Section: Candidate Sourcesmentioning

confidence: 99%

The Simons Observatory: Beam Characterization for the Small Aperture Telescopes

Dachlythra,

Duivenvoorden,

Gudmundsson

et al. 2024

ApJ

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We use time-domain simulations of Jupiter observations to test and develop a beam reconstruction pipeline for the Simons Observatory Small Aperture Telescopes. The method relies on a mapmaker that estimates and subtracts correlated atmospheric noise and a beam fitting code designed to compensate for the bias caused by the mapmaker. We test our reconstruction performance for four different frequency bands against various algorithmic parameters, atmospheric conditions, and input beams. We additionally show the reconstruction quality as a function of the number of available observations and investigate how different calibration strategies affect the beam uncertainty. For all of the cases considered, we find good agreement between the fitted results and the input beam model within an ∼1.5% error for a multipole range ℓ = 30–700 and an ∼0.5% error for a multipole range ℓ = 50–200. We conclude by using a harmonic-domain component separation algorithm to verify that the beam reconstruction errors and biases observed in our analysis do not significantly bias the Simons Observatory r-measurement

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