Before revision: In 2019 a diffractive solar sail project from the Rochester Institute of Technlolgy suggested a solar polar orbit mission with diffractive sails that could reach a higher solar inclination angle and smaller orbital radius than one with reflective sails, reaching NASA's NIAC phase II.
After revision: In 2019 a diffractive solar sail project from the Rochester Institute of Technlology suggested a solar polar orbit mission with diffractive sails that could reach a higher solar inclination angle and smaller orbital radius than one with reflective sails, reaching NASA's NIAC phase II.