4 research outputs found
TiEMPO: Open-source time-dependent end-to-end model for simulating ground-based submillimeter astronomical observations
The next technological breakthrough in millimeter-submillimeter astronomy is
3D imaging spectrometry with wide instantaneous spectral bandwidths and wide
fields of view. The total optimization of the focal-plane instrument, the
telescope, the observing strategy, and the signal-processing software must
enable efficient removal of foreground emission from the Earth's atmosphere,
which is time-dependent and highly nonlinear in frequency. Here we present
TiEMPO: Time-Dependent End-to-End Model for Post-process Optimization of the
DESHIMA Spectrometer. TiEMPO utilizes a dynamical model of the atmosphere and
parametrized models of the astronomical source, the telescope, the instrument,
and the detector. The output of TiEMPO is a time-stream of sky brightness
temperature and detected power, which can be analyzed by standard
signal-processing software. We first compare TiEMPO simulations with an on-sky
measurement by the wideband DESHIMA spectrometer and find good agreement in the
noise power spectral density and sensitivity. We then use TiEMPO to simulate
the detection of a line emission spectrum of a high-redshift galaxy using the
DESHIMA 2.0 spectrometer in development. The TiEMPO model is open source. Its
modular and parametrized design enables users to adapt it to design and
optimize the end-to-end performance of spectroscopic and photometric
instruments on existing and future telescopes.Comment: Presented at SPIE Astronomical Telescopes + Instrumentation 2020.
Full published paper, poster and video available at
https://doi.org/10.1117/12.2561014 Open-source Python package of TiEMPO:
https://pypi.org/project/tiempo-deshima/ Open-source code of TiEMPO:
https://zenodo.org/record/4279086#.X_jAsdhKg2
TiEMPO: Open-source time-dependent end-To-end model for simulating ground-based submillimeter astronomical observations
The next technological breakthrough in millimeter–submillimeter astronomy is three-dimensional imaging spectrometry with wide instantaneous spectral bandwidths and wide fields of view. The total optimization of the focal-plane instrument, the telescope, the observing strategy, and the signal-processing software must enable efficient removal of foreground emission from the Earth’s atmosphere, which is time-dependent and highly nonlinear in frequency. Here, we present Time-dependent End-to-end Model for Post-process Optimization (TiEMPO) of the DEep Spectroscopic HIgh-redshift MApper (DESHIMA) spectrometer. TiEMPO utilizes a dynamical model of the atmosphere and parameterized models of the astronomical source, the telescope, the instrument, and the detector. The output of TiEMPO is a time stream of sky brightness temperature and detected power, which can be analyzed by standard signal-processing software. We first compare TiEMPO simulations with an on-sky measurement by the wideband DESHIMA spectrometer, and find good agreement in the noise and sensitivity. We then use TiEMPO to simulate the detection of the line emission spectrum of a high-redshift galaxy using the DESHIMA 2.0 spectrometer in development. The TiEMPO model is open source. Its modular and parametrized design enables users to adapt it to optimize the end-to-end performance of spectroscopic and photometric instruments on existing and future telescopesISSN:2329-4221ISSN:2329-412
TiEMPO: Open-source time-dependent end-to-end model for simulating ground-based submillimeter astronomical observations
The next technological breakthrough in millimeter-submillimeter astronomy is three-dimensional imaging spectrometry with wide instantaneous spectral bandwidths and wide fields of view. The total optimization of the focal-plane instrument, the telescope, the observing strategy, and the signal-processing software must enable efficient removal of foreground emission from the Earth's atmosphere, which is time-dependent and highly nonlinear in frequency. Here, we present Time-dependent End-to-end Model for Post-process Optimization (TiEMPO) of the DEep Spectroscopic HIgh-redshift MApper (DESHIMA) spectrometer. TiEMPO utilizes a dynamical model of the atmosphere and parameterized models of the astronomical source, the telescope, the instrument, and the detector. The output of TiEMPO is a time stream of sky brightness temperature and detected power, which can be analyzed by standard signal-processing software. We first compare TiEMPO simulations with an on-sky measurement by the wideband DESHIMA spectrometer, and find good agreement in the noise and sensitivity. We then use TiEMPO to simulate the detection of the line emission spectrum of a high-redshift galaxy using the DESHIMA 2.0 spectrometer in development. The TiEMPO model is open source. Its modular and parametrized design enables users to adapt it to optimize the end-to-end performance of spectroscopic and photometric instruments on existing and future telescopes