The Electromagnetically Isolated Global Signal Estimation Platform (EIGSEP)
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arXiv
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| Autores principales: | , , , , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866915770132332544 |
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| author | Bye, Christian H. DeBoer, David R. Dexter, Matt Ewall-Wice, Aaron Fahs, Adam Karthik, Pranav Kaur, Komal Khalichi, Bahram Liu, Wei Monsalve, Raul A. Parsons, Aaron R. Parsons, Reid Rodriguez, Richard R. Saeed, Richard J. Tolley, Charlie G. Vazquez, Dominic Wright, Dirk |
| author_facet | Bye, Christian H. DeBoer, David R. Dexter, Matt Ewall-Wice, Aaron Fahs, Adam Karthik, Pranav Kaur, Komal Khalichi, Bahram Liu, Wei Monsalve, Raul A. Parsons, Aaron R. Parsons, Reid Rodriguez, Richard R. Saeed, Richard J. Tolley, Charlie G. Vazquez, Dominic Wright, Dirk |
| contents | The Electromagnetically Isolated Global Signal Estimation Platform (EIGSEP) is a new instrument designed to measure the global 21-cm signal from Cosmic Dawn and the Epoch of Reionization, redshifted to frequencies below 250 MHz. To reduce spectral structure in the antenna beam associated with ground scattering, EIGSEP uses a shaped bowtie antenna suspended in a canyon 100 m above the ground. We describe the current system design of EIGSEP, including the rotating antenna platform, a transmitter antenna to characterise the beam of the bowtie antenna, and auxiliary ground antennas. We then discuss the EIGSEP calibration scheme, which incorporates traditional Dicke switching in the receiver, and novel approaches that include beam mapping, beam modulation, and interferometric cross-correlation. The instrument has been deployed near Marjum Pass, Utah, for testing and initial data collection. We discuss the site characteristics and present initial field measurements. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_02661 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | The Electromagnetically Isolated Global Signal Estimation Platform (EIGSEP) Bye, Christian H. DeBoer, David R. Dexter, Matt Ewall-Wice, Aaron Fahs, Adam Karthik, Pranav Kaur, Komal Khalichi, Bahram Liu, Wei Monsalve, Raul A. Parsons, Aaron R. Parsons, Reid Rodriguez, Richard R. Saeed, Richard J. Tolley, Charlie G. Vazquez, Dominic Wright, Dirk Instrumentation and Methods for Astrophysics Cosmology and Nongalactic Astrophysics The Electromagnetically Isolated Global Signal Estimation Platform (EIGSEP) is a new instrument designed to measure the global 21-cm signal from Cosmic Dawn and the Epoch of Reionization, redshifted to frequencies below 250 MHz. To reduce spectral structure in the antenna beam associated with ground scattering, EIGSEP uses a shaped bowtie antenna suspended in a canyon 100 m above the ground. We describe the current system design of EIGSEP, including the rotating antenna platform, a transmitter antenna to characterise the beam of the bowtie antenna, and auxiliary ground antennas. We then discuss the EIGSEP calibration scheme, which incorporates traditional Dicke switching in the receiver, and novel approaches that include beam mapping, beam modulation, and interferometric cross-correlation. The instrument has been deployed near Marjum Pass, Utah, for testing and initial data collection. We discuss the site characteristics and present initial field measurements. |
| title | The Electromagnetically Isolated Global Signal Estimation Platform (EIGSEP) |
| topic | Instrumentation and Methods for Astrophysics Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2602.02661 |