Surveying satellite transit data using radio interferometry of the 21 cm emission line

Authors: Adrian Taveras, John Estes

SUNY Campus: SUNY Old Westbury

Presentation Type: Poster

Location: UU 111

Presentation #: 73

Timeslot: Session C 1:45-2:45 PM

Abstract: Radio emissions reveal the remnants of astronomical events and the presence of celestial bodies throughout or universe. As a means of cultivating these emissions, astronomers developed technologies such as the radio telescope which survey cosmological activity by measuring the radio band which occupy the 10 MHz to 1 THz frequency of the electromagnetic spectrum. This study carries out 21 cm intensity mapping experiments using the Baryon Mapping eXperiment (BMX); an interferometric array developed within the Brookhaven National Laboratory. To prepare for future 21 cm intensity mapping such as the proposed Packed Ultra-wideband Mapping Array (PUMA), a prototype instrument was designed and built within BNL to not only increase time testing new techniques but will allow easier implementation of new technologies and performing maintenance. This study analyzes global navigational satellite system (GNSS) transmissions to find satellite frequencies and trajectory using python code. To test self-calibration by means of measuring the closure phase, the correlation products were extracted from the data of multiple satellites. After analyzing the data of multiple trajectories, it was concluded that the satellites are not fully calibrated based on the closure phase of the three satellites selected where 10.6 for the 110 auto-correlation, 0.25 for the 220 auto-correlation, 7.4 for the 330 auto-correlation, and 18 for the 440 auto-correlation.