ska phase 1 system requirements specification - The Square ...

WP2‐005.030.000‐SRS‐002Revision : B3.2 Science Requirements DerivationThe science requirements have primarily been extracted from the science cases discussed in theDRM [1] and are listed below. The numbers are related to the chapter number of the science cases inthe DRM document.2 Probing the Neutral Intergalactic Medium During the Epoch of Reionization3 Tracking Galaxy Evolution over Cosmic Time via H I Absorption4 Probing the Epoch of Reionization Using the 21‐cm Forest5 Pulsar Surveys6 Pulsar Timing7 Extensibility: Phase 1 to Phase 2The SKA1 DRM [1] includes a direct translation of astronomical requirements into a limited set ofsystem requirements. It concerns the following observational and technical system requirements:Spectral: frequency range (Hz) instantaneous bandwidth (Hz) channel width (Hz) channel width required for RFI avoidance/suppression (Hz)Spatial: minimum or maximum baseline (m) instantaneous FOV (degree 2 ) sky coverage (degree 2 )Temporal time resolution (s)Sensitivity sensitivity (Aeff/Tsys, in m 2 K ‐1 ) survey speed (m 4 K ‐2 deg 2 )Dynamic range imaging dynamic range (dB) spectral dynamic range (dB) polarization dynamic range (dB)Three classes of top level requirements can be distinguished, scientific requirements, derivedtechnical requirements and constraint requirements.Scientific requirements are directly related to the SKA 1 astronomical science cases, and includefrequency range, polarisation, and limiting flux density. These requirements are more or less2011‐02‐14 Page 11 of 58