STS-51-A lo je ifoloke keji fun Oko-alobo Ofurufu Discovery, ati ifoloke 14k eto Oko-alobo Ofurufu ti NASA.. 
It could take up to 100,000 measurements per second with a photoṢàánú Accuracy of about 2% or better.Hst's guidance system can also be used as a Scientific instrument.. 