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Global 21-cm experiments require exquisitely precise calibration of themeasurement systems in order to separate the weak 21-cm signal from Galacticand extragalactic foregrounds as well as instrumental systematics. Hitherto,experiments aiming to make this measurement have concentrated on measuring thissignal using the single element approach. However, an alternative approachbased on interferometers with short baselines is expected to alleviate some ofthe difficulties associated with a single element approach such as precisionmodelling of the receiver noise spectrum. Short spacing InterferometerTelescope probing cosmic dAwn and epoch of ReionisAtion (SITARA) is a shortspacing interferometer deployed at the Murchison Radio-astronomy Observatory(MRO). It is intended to be a prototype or a test-bed to gain a betterunderstanding of interferometry at short baselines, and develop tools toperform observations and data calibration. In this paper, we provide adescription of the SITARA system and its deployment at the MRO, and discussstrategies developed to calibrate SITARA. We touch upon certain systematicsseen in SITARA data and their modelling. We find that SITARA has sensitivity toall sky signals as well as non-negligible noise coupling between the antennas.It is seen that the coupled receiver noise has a spectral shape that broadlymatches the theoretical calculations reported in prior works. We also find thatwhen appropriately modified antenna radiation patterns taking into account theeffects of mutual coupling are used, the measured data are well modelled by thestandard visibility equation.

System design and calibration of SITARA -- a global 21 cm short spacing interferometer prototype