urn:nasa:pds:context:telescope:bopps.sto 1.0 1.7.0.0 Product_Context 2017-02-27 1.0 A. Raugh: Creation urn:nasa:pds:context:airborne:balloon.bopps telescope_to_airborne urn:nasa:pds:bopps2014:document:sto_overview context_to_associate This small text document provides a brief overview of the STO telescope. 80 The Stratospheric TeraHertz Observatory (STO) telescope is a light-weight telescope designed to be carried as part of a balloon-borne payload. It has an 80cm diamater hyperboloid primary mirror designed for maximum performance in the 300-5000nm wavelength range. This telescope originally flew on the Stratospheric TeraHertz Observatory and was refitted to be carried by the BOPPS (balloon observatory) gondola.