Browsing by Author "Best Reyes, Sergio André"

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Drone-based polarization calibration source for mm-wave telescopes
    (IEEE, 2021) Dünner Planella, Rolando; Fluxa Nadeau, Juan Carlos; Best Reyes, Sergio André; Carrero Muñoz, Felipe Ernesto; Boettger, David
    To probe alternative cosmologies, future CMB experiments will require an exquisite absolute polarization angle calibration. The scarce number natural polarized calibrators makes artificial alternatives appealing. Moreover, ground loading restrictions force these sources to be located at high elevations. We have shown that commercial drones can operate at altitudes above 5200 meters, lifting 4 kg payloads for 10 minutes, being capable of reaching the far-field of small aperture telescopes. A drone-based calibration source, equipped with a high-precision metrology system based on an RTK GPS, a photogrammetry camera and a geo-referenced reconstruction of the site, can provide an absolute polarization angle reference accurate to 0.1 degrees. The metrology data must be synchronized in time with the detector time-streams to compensate the source movements. We implemented an electronically chopped, linearly polarized 150 GHz coherent source, for serving the experiments CLASS, ACT, Simons Array and Simons Observatory.
  • Thumbnail Image
    Item
    The Parking Lot Planet
    (2022) Best Reyes, Sergio André; Correa Horta, Fernanda; Espinoza Retamal, Juan
    We give conditions for an exoplanetary system to function as an ideal amusement park/vacation resort (with its separate parking lot, of course); in case of massive human interplanetary colonization. Our considerations stem from the fact that an amusement park needs a parking lot of roughly the same surface area, thus the best option for its construction would be a system with at least 2 planets close to each other for easy tourist transportation. We also discuss the likelihood of finding such a system out there to cut down on construction costs.