Assertion: sextant | /r/HasProperty | a one-of-a-kind investigation
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text: NICER/SEXTANT, which NASA's Science Mission Directorate selected in 2013 as its next Explorer Mission of Opportunity, is a one-of-a-kind investigation that not only will gather important scientific data, but also demonstrate advanced navigation technologies—all from a relatively low-cost instrument that takes advantage of an already-existing platform, the International Space Station (ISS).