A multi-antenna GLS mapmaking method recovers the global 21-cm sky monopole without beam-chromaticity bias, outperforming single-spectrum fits when high-order foreground modes are known to about 10%.
arXiv:2410.00076
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Low multipole mapmaking for global 21-cm experiments
A multi-antenna GLS mapmaking method recovers the global 21-cm sky monopole without beam-chromaticity bias, outperforming single-spectrum fits when high-order foreground modes are known to about 10%.