Orbital Insight Inc., the startup betting on using big-data analysis of satellite imagery to give investors a more accurate and timely view of the global economy, raised $50 million from U.S. and Japanese investors to bring its total funding to $78.7 million. The Series C funding was led by Sequoia Capital, one of Silicon Valley’s top venture capital firms, and additional investors included Geodesic Capital and Japan’s Itochu Corp.