With latest technologies most of the smart devices are expected to work in all types of environments including indoor scenarios. But, conventional Global Navigation Satellite System (GNSS) receivers when used in indoor environments face difficulty in dealing with the propagating signals, hence channel modeling of signals in indoor is necessary. In this paper, experiments are carried out using IRNSS S1 and L5 signals at three indoor locations to compare their performance with the corresponding outdoor locations only differed by altitude. The experimental environment and effect of signal obstructions are explained using C/No and system specifications. The results would be useful in designing indoor applications of IRNSS.