India’s first privately developed orbital rocket has given the country’s fledgling commercial space industry a long-sought proof point, but analysts say Skyroot Aerospace must now show it can launch regularly, cheaply and reliably enough to win customers in a crowded global market. Skyroot’s Vikram-1 rocket lifted off on Saturday from the Satish Dhawan Space Centre in Sriharikota in the southern Indian state of Andhra Pradesh, carrying several customer payloads and in-orbit experiments on its...