Thanks for checking. That link apparently runs a server-driven powerpoint viewer which is not platform independent

Try this as the direct download link:
https://vff5jg-bn1305.files.1drv.com/y3mYWy1zFfWGB9xB26pLc-J3u8NbJSb9t3e96A3K6l4M20MUiLj0K8V6f3Wn3jlo-Fwoa2_faOYBfWNquPPJU5kyX587rj3TknApwL5PNAMG-k/AnalyticalFormulationOfEquatorialStandingWavePhenomena2.ppsx?download&psid=1