ASTROSAT is India’s first multi-wavelength astronomy satellite, was successfully launched on 2015 September 28 by PSLV in a ∼ 650 km near-equatorial orbit. It can be used to study astronomical objects in a wide range of electromagnetic energy band from UV to hard X-rays. With a very high spectral, timing as well as spacial resolutions from different scientific instruments of the satellite, one can make a detailed spectral and timing study of transient black hole candidates (BHCs) during their outbursts. Recently, we have included Chakrabarti-Titarchuk (1995) Two-Component Advective Flow (TCAF) model in HEASARC’s spectral analysis package XSPEC as a local additive table model to fit black hole with the model, and we found that it is quite capable of explaining both the spectral and temporal properties of BHCs very successfully. Multi-wavelength data of ASTROSAT is expected to provide some useful data to understand spectral as well as temporal variability of transient BHCs using TCAF solution. Here, we discuss various aspects of TCAF which can be verified from ASTROSAT data.