Later today (see countdown), ISRO will launch Pits #PSLV-C60/SPADEX Mission. SPAce Docking EXperiment (SPADEX) dual spacecrafts.
The mission objective is to test in-orbit rendezvous and docking. Primary payloads are two separate spacecraft, each of about 200+kg, a chaser and a target. The PSLV will place them in two different orbits, and 10 days later, the chaser will adjust its orbit, approach and dock with the target. Control of the combined spacecraft, power transfer between them, and subsequent undocking procedures are also part of the mission.
In addition, ISRO continues to exploit the 4th stage as the PSLV Orbital Experiment Platform (POEM) at around 350km altitude. The POEM will host 24 experiments, 10 of which are non-governmental – academic institutions or private sector startups. The POEM and hosted payloads have a lifetime of a few months, but the SPADEX mission is expected to operate for two years.
See the countdown here. The launch will be streamed on Youtube live here.
For more details, the ISRO subreddit is an excellent source.
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