The launch, subject to weather conditions, would take place from the Satish Dhawan Space Centre in Sriharikota, a press release from the space agency said in Bengaluru.
The PSLV-C46 is the 14th flight of PSLV in 'core-alone' configuration, the statement said.
The RISAT-2B would be placed in an orbit of 555 km at an inclination of 37 degrees, it said.
ISRO has made provision for the public to view the launch from recently opened viewers' gallery at the Satish Dhawan Space Centre.
Online registration to watch the take-off would start five days before the launch, it said.